Welch Allyn 1500 User Manual

Welch Allyn

®

1500

Patient Monitor

Directions for use

Software version 1.3.X

ii Welch Allyn 1500 Patient Monitor

© 2011 Welch Allyn. All rights are reserved. To support the intended use of the product described in this publication, the purchaser of
the product is permitted to copy this publication, for internal distribution only, from the media provided by Welch Allyn. No other use,
reproduction, or distribution of this publication, or any part of it, is permitted without written permission from Welch Allyn.

Welch Allyn assumes no responsibility for any injury to anyone, or for any illegal or improper use of the product, that may result from
failure to use this product in accordance with the instructions, precautions, warnings, or statement of intended use published in this
manual.

Welch Allyn, Acuity, Smartcuf, FlexNet, and Flexible Monitoring are registered trademarks of Welch Allyn.

Masimo, SET, and Signal Extraction Technology are registered trademarks of Masimo Corporation

NO IMPLIED LICENSE:
Possession or purchase of this device does not convey any express or implied license to use the device with unauthorized sensors or
cables which would, alone, or in combination with this device, fall within the scope of one or more of the patents relating to this
device.

Nellcor and Oximax are trademarks of Nellcor Puritan Bennett.

NOTICE: Purchase of this instrument confers no express or implied license under any Nellcor Puritan Bennett patent to use this
instrument with any oximetry sensor that is not manufactured or licensed by Nellcor Puritan Bennett.

Microstream is a registered trademark of Oridion.

NO IMPLIED LICENSE: Possession or purchase of this device does not convey any express or implied license to use the device with
unauthorized consumable CO
scope of one or more of the patents relating to this device and/or CO2 sampling consumable products

Software in this product is copyrighted by Welch Allyn or its vendors. All rights are reserved. The software is protected by United
States of America copyright laws and international treaty provisions applicable worldwide. Under such laws, the licensee is entitled
to use the copy of the software incorporated with this instrument as intended in the operation of the product in which it is
embedded. The software may not be copied, decompiled, reverse-engineered, disassembled or otherwise reduced to
human-perceivable form. This is not a sale of the software or any copy of the software; all right, title and ownership of the software
remain with Welch Allyn or its vendors.

For information about any Welch Allyn product, call the nearest Welch Allyn representative.

:

USA + 1 315 685 4560

Canada 800 561 8797 China + 86 216 327 9631

European Call
Center

Germany + 49 7477 92 71 86 Japan + 81 3 3219 0071

Latin America + 1 305 669 9003 Netherlands + 31 15 750 5000

Singapore + 65 6419 8100 South Africa + 27 11 777 7555

United Kingdom + 44 20 7365 6780 Sweden + 46 8 58 53 65 51

sampling consumable products which would, alone, or in combination with this device, fall within the

2

800 535 6663

Australia + 61 2 9638 3000

800 074 793

+ 35 3 46 906 7790 France + 33 1 60 09 33 66

REF 104592 (CD)

Manual 2.510865 Ver. c, 2011-09

SCHILLER AG
Altgasse 68
CH-6341 Baar Switzerland

www.welchallyn.com

SCHILLER AG
Altgasse 68
CH-6341 Baar Switzerland

Directions for use Contents iii

Contents

1 - Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

User responsibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Intended use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Organizational measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Safety equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Operation with other devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Networks and internet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Additional terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2 - Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Standard features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

The Welch Allyn

Function buttons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Setup menu overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Display overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

®

1500 Patient Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3 - Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Startup and initial preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Inserting recorder paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Switching the monitor on or off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Initial settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Saving the user-defined settings as default . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Standby mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Defining parameter fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Defining display waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Trend data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Settings via a parameter field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4 - Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Display of alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Silencing an alarm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Suspend all alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Turning off an individual parameter alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Alarm Volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Alarm limit setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Physiological alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

iv Contents Welch Allyn 1500 patient monitor

5 - Monitoring and Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

ECG. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Arrhythmia . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

ST measurement (option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Respiration rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Capnography. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

NIBP monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

SpO

monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

2

IBP monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

Temperature monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Cardiac output (option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

6 - Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Maintenance interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Visual inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Button check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Speaker check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

LED check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Alarm check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Battery maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Inspecting and cleaning the monitor and accessories . . . . . . . . . . . . . . . . . . . . 92

Inspection and checklist report. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Replacing the fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97

EMC compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98

Mounting on a wall or stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Recycling monitor components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

7 - Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Setup menu overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Parameter settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

8 - Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Miscellaneous. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Nellcor SpO
Masimo SpO

ECG. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

IBP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

NIBP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Cardiac output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

2

A - Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

System data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Safety standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Measured values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

1

©

1

Safety

User responsibility

• The numerical and graphical results and any interpretation given must be examined
with respect to the overall clinical condition of the patient and the general recorded
data quality.

• The indications given by this equipment are not a substitute for regular checking of
vital functions.

• This monitor is only to be used by those trained in its operation or repair.

• Ensure that the personnel have read and understood these operating instructions and
in particular this “Safety” section.

• Damaged or missing components must be replaced immediately.

• It is the owner's responsibility that the valid regulations for safety and prevention of
accidents are observed.

Intended use

• The Welch Allyn® 1500 Patient Monitor patient monitoring unit is designed for the
monitoring of vital parameters such as ECG, SpO
pressure (NIBP), invasive blood pressure (IBP), temperature and respiration of a
patient. Cardiac output and hemodynamic calculations are also possible.

• The device is intended to be used by qualified doctors or trained medical personnel.

• The device is not suitable for transport.

• There is no danger for patients with pacemaker.

• The device is intended for the monitoring of one patient at a time.

• The device is not designed for sterile use nor is it designed for outdoor use.

• Do not use this monitor in areas where there is any danger of explosion or in the
presence of flammable gases.

• The device is classified CF. It is defibrillation protected when the original
accessories are used. However, as a safety precaution when possible, remove the
electrodes before defibrillation.

• This product is not designed for direct cardiac application.

• The arrhythmia module is not intended for use with neonatal patients.

• The ST-analysis module is not intended for use with neonatal patients.

, etCO2, non invasive blood

2

2 Safety Welch Allyn 1500 Patient Monitor

Organizational measures

• Before using the monitor, ensure that an introduction regarding the monitor functions
and the safety precautions have been provided by a medical product representative.

• Observe the operating instructions and maintenance instructions.

• These operating instructions do not override any statutory or local regulations, or
procedures for the prevention of accidents and environmental protection.

Safety

WARNING Mount the monitor securely so that there is no possibility of it falling

on the patient or on the floor.

WARNING If uncertain about the accuracy of any measurement, first check the
patient’s vital signs by alternate means, and then make sure the monitor is
functioning correctly.

WARNING Do not touch the monitor during defibrillation.

WARNING To ensure patient safety, none of the ECG electrodes including the

neutral electrode, nor the patient or any person with simultaneous patient
contact, must come in contact with conductive parts, even when these are
grounded.

WARNING If you notice any changes that impair safety (including operating
behavior) remove the monitor from service and report it to the person responsible
for servicing the monitor.

WARNING Do not place any liquids on the monitor. If liquid is spilled over the
monitor, immediately disconnect the monitor from the mains and dry. The
monitor must be serviced before reusing.

Caution This manual, and especially these safety notes, must be read and
observed.

Caution Electrical installation of the room or the building in which the monitor is
to be used must comply with regulations specified by the country in which the
equipment is to be used

Caution Ensure the monitor is always mounted on a Welch Allyn approved
bracket or stand. The monitor is unstable when the unit is not secured to an
approved Welch Allyn mounting system.

Directions for use Safety 3

Safety equipment

Operating the monitor without the correctly rated fuse, or with defective cables,
constitutes a danger to patient safety. Therefore:

Caution Do not operate the monitor if the ground connection is suspect or if the
mains lead is damaged or suspected of being damaged.

Caution Damaged cables and connections must immediately be replaced.

Caution Electrical safety devices, such as fuses, must not be modified.

Caution Fuses must only be replaced with the same type and rating as the

original.

Alarms

WARNING Do not silence the audible alarm if patient safety could be

compromised.

WARNING Always respond immediately to an equipment alert because the
patient may not be monitored during certain alarm conditions.

WARNING Before each use, verify that the alarm limits are appropriate for the
patient being monitored.

WARNING Check the audible alarm silence duration before temporarily silencing
the audible alarms.

4 Safety Welch Allyn 1500 Patient Monitor

Operation with other devices

Caution Do not use the monitor in or near an MRI suite.

• Only use accessories and other parts recommended or supplied by Welch Allyn. Use
of other than recommended or supplied parts may result in injury, inaccurate
information or damage to the monitor.

• Accessory equipment connected to the analogue and digital interfaces must be
certified according to the respective IEC standards (e.g. IEC/EN 60950 for data
processing equipment and IEC/EN 60601-1 for medical equipment). Furthermore all
configurations shall comply with the current version of the system standard IEC/EN
60601-1-1. Anyone who connects additional equipment to the signal input part or
signal output part configures a medical system, and is therefore responsible that the
system complies with the requirements of the valid version of the system standard
IEC/EN 60601-1-1. If in doubt, consult the technical service department or your local
representative.

• Any other equipment used with the patient must use the same common ground as
the monitor.

• Precautions must be observed when using high frequency devices. Operating high
frequency electro-surgical equipment in the vicinity of the monitor can produce
interference in the monitor and cause incorrect measurements. Only use patient
cables recommended by Welch Allyn to avoid possible signal interference during ECG
acquisition.

• There is no danger when using the ECG monitor simultaneously with electrical
stimulation equipment. However, during defibrillation, keep discharge paddles away
from the monitor ECG lead wires, electrodes, any other monitor sensors, and other
conductive parts in contact with the patient.

• If the patient cable should become defective after defibrillation, a lead-off indication is
displayed and an audible alarm is issued.

• Portable communication equipment, HF two-way radios and devices marked with the

symbol can affect this monitor (see “EMC compliance” on page 98).

Networks and internet

• When the monitor is part of a network, (LAN, HIS, etc.), transmitting over a telephone
network or any other transmission /reception medium, or if exposed to the Internet or
other networks that are not secure, appropriate security measures must be provided
to protect the patient information stored.

• Patient security and security of the network is the sole responsibility of the user.

Directions for use Safety 5

Maintenance

WARNING Danger of electric shock. Do not open the monitor case. There are no

user serviceable parts inside. Servicing may only be performed by a qualified
technician authorized by Welch Allyn.

WARNING Before cleaning and to isolate the mains power supply, switch the
monitor off and disconnect it from the mains by removing the plug.

Caution Do not use high temperature sterilization processes (such as
autoclaving). Do not use E-beam or gamma radiation sterilization.

Caution Do not use solvent or abrasive cleaners on either the monitor or cable
assemblies.

Caution Do not immerse the monitor or cable assemblies in liquid.

Symbols

These symbols appear in this user guide.

WARNING Warning statements in this user guide identify conditions or
practices that could result in personal injury.

Caution Caution statements in this user guide identify conditions or practices
that could result in damage to the equipment or other property.

6 Safety Welch Allyn 1500 Patient Monitor

©

The following symbols appear on the monitor, or accessories.

Symbol Definition Symbol Definition

Potential equalization (earth ground) CF symbol. This monitor is classified safe for

The monitor can be recycled. Recycle the monitor and battery

Notified body of the CE certification (TÜV
P.S.).

Altitude limits Humidity limits

Keep away from sunlight Stacking limit

Temperature limits Keep away from rain

This way up Fragile

internal and external use. However, it is only
defibrillation protected when used with the
original Welch Allyn patient cable!

separately from other waste. Refer to

www.welchallyn.com/weee for collection

point and additional information.

Note accompanying documents.

CO

in CO2 out

2

Temperature NIBP

The following symbols appear on the screen.

Symbol Definition Symbol Definition

Alarm off Patient mode symbols; neonate, pediatric,

adult

Directions for use Safety 7

Note

Note

Additional terms

Implied authorization

Possession or purchase of this monitor does not convey any express or implied license to
use the monitor with replacement parts which would alone, or in combination with this
monitor, fall within the scope of one or more patents relating to this monitor.

Terms of warranty

Your monitor is warranted against defects in material and manufacture for the duration of
one year (from date of purchase). Excluded from this guarantee is damage caused by an
accident or as a result of improper handling. The warranty entitles free replacement
including labor, of the defective part. Any liability for subsequent damage is excluded. The
warranty is void if unauthorized or unqualified persons attempt to make repairs.

In case of a defect, send the apparatus to your dealer or an authorized Welch Allyn service
center. The manufacturer can only be held responsible for the safety, reliability, and
performance of the apparatus if:

• assembly operations, extensions, readjustments, modifications, or repairs are carried
out by persons authorized by the manufacturer.

• the monitor and approved attached equipment is used in accordance with the
manufacturer's instructions.

There are no express or implied warranties which extend beyond the warranties
hereinabove set forth. Welch Allyn makes no warranty of merchantability or
fitness for a particular purpose with respect to the product or parts thereof.

This equipment has been tested and found to comply with the limits for a class A
digital device, pursuant to both Part 15 of the FCC (Federal Communications
Commission) rules and the radio interference regulations of the Canadian
Department of Communications. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with this instruction
user guide, may cause harmful interference to radio communications. Operation
of this equipment in a residential area is likely to cause harmful interference in
which case the user will be required to correct the interference at his own
expense.

WHEN USED IN CANADA: To prevent radio interference to the licensed service,
this device is intended to be operated indoors and away from windows to provide
maximum shielding. Equipment (or its transmit antenna) that is installed outdoors
is subject to licensing.

8 Safety Welch Allyn 1500 Patient Monitor

9

2

Introduction

The monitor is designed for adult, pediatric and neonatal use. It has a 15-inch screen for
comprehensive vital data monitoring. The monitor can be used with mains power (100 –
240 VAC) or with an internal battery.

Standard features

• Function buttons and trim knob for easy operation

• 15-inch color screen

• Vital parameters:

• ECG (3, 5 or 12 lead)

• Heart rate

• Respiration

• Non invasive blood pressure

•SpO

• Temperature (x1)

• Drug calculations

(Masimo or Nellcor)

2

Options

• Printer

•etCO

• 12-lead resting ECG with measurements

• 12-lead resting ECG with measurements and interpretation

• Arrhythmia analysis

• ST analysis

• Cardiac output and hemodynamic calculations

• Invasive blood pressure (x2 or x4)

• Temperature (x2)

and Integrated Pulmonary Index™ (IPI)

2

10 Introduction Welch Allyn 1500 Patient Monitor

Visual alarm
indicator

Patient
connection
panel

Function button
panel

Trim knob

Ethernet (RJ45)
connector

Potential
equalization
(ground)

Nurse call
connector*

Mains connector
(100-240 VAC)
and fuse panel

Printer

USB connector
(lift door)

The Welch Allyn® 1500 Patient Monitor

Front panel

Back panel

*The nurse call can be used to give an external indication of a parameter alarm.

Directions for use Introduction 11

Note

Temperature 1

etCO2 sampling input

etCO2 sampling exhaust

ECG

NIBP

IBP 2

SVC

(service only)

SpO

2

IBP 1

IBP 3

IBP 4

Temperature 2

Cardiac Output

Connection panel

The connection panel layout will vary according to the options installed.

12 Introduction Welch Allyn 1500 Patient Monitor

Function buttons

Print
Printout of three waveforms and all parameters. The waveforms and print settings are
defined in the printer
can also be obtained when a limit is violated. This is also defined in system setup.

Alarm silence
Silence / resume an audible alarm, or confirmation of displayed messages. The silence
time is defined in the Setup/Administrator menu (see “Administrator” on page 108).

NIBP measurement interval
Interval setup for non-invasive blood pressure measurement or switch-off of the interval
measurement (see “Automatic blood pressure measurement” on page 64). Saves patient
information.

NIBP measurement
Start or stop of the non-invasive blood pressure measurement (see “Taking a single NIBP

measurement” on page 64).

Standby
In standby mode patient monitoring is interrupted and the screen is blank. Monitoring is
resumed when any button is pressed.

Setup
Display of the Setup menu. The required menu item can be selected by turning the trim
knob and pressing (see next page).

Trend
Displays trend data (see “Trend data” on page 29).

menu (see “Recorder” on page 103). Note that an auto printout

Home
Pressing this button closes opened dialogues and returns to the monitoring screen.
Any settings that were changed in the opened dialogue screen are saved.
Pressing this button is the same as selecting

ON/OFF
Press to switch the monitor on.
Press and hold for 4 seconds to switch the monitor off.
The LEDs below this button indicate:

• Left LED - mains power is connected to the monitor.

• Right LED - mains connected to the monitor and internal battery being charged.

• (see “Switching the monitor on or off” on page 19).

Trim knob
The trim knob is used for navigation, value selection and value change. Use as follows:

1. Turn the trim knob to the left or right to select a field or value. A white frame appears around
the field.

2. Press the trim knob to open the menu of the selected parameter field or value.

3. Turning the trim knob to the left or right to select the desired value.

4. Press the trim knob to apply the changed value.

OK on the opened dialogue screen.

Directions for use Introduction 13

Note

Setup menu overview

Press to enter the setup menu and adjust the following settings and options:

The following is an overview of the setup menu options. Further details are given
in section 8 (see “Settings” on page 101).

Parameter Settings/Submenus

Alarm Suspend Silences all alarms for a set period. The silence time is defined in the

Arrhythmia

Alarms Alarm overview. All alarm limits and print on alarm settings.

Speaker Volume Speaker volume.

HR/PR Tone Volume Heart beat volume.

Waveform area Defines the waveforms to be displayed and the size and sweep speed.

Recorder

Parameters

12-lead Resting ECG

Hemodynamic
Calculations

Drug Calculations Screen for entry of drug parameters with dose and titration calculations based

Patient Information Enter/edit patient ID and patient information.

Patient Mode Neonatal:

Restore User Defaults Reset all settings to user defaults (see administrator > system, below).

1

2

3

5

Administrator menu (alarms).

Arrhythmia limits and alarm levels.
Pacer Display and analysis (on/off).

Defines the data on the printout.

Enable/disable any combination of the following: ST measurements, etCO2,
Masimo SpO2 settings, cardiac output, invasive blood pressure display and
temperature display options.

4

View electrode status, and take a resting ECG. After the resting ECG has been
taken, the option to obtain a printout is given.

Screen for entry of hemodynamic measurement parameters with automatic
hemodynamic calculations based on entered parameters.

on entered parameters.

Birth through 28 days.

Pediatric:

Between 29 days and 12 years.

Adult:

13 years and older.

14 Introduction Welch Allyn 1500 Patient Monitor

Parameter Settings/Submenus

Administrator Configuration

Display of monitor ID, network settings, options, etc. This is for information
only.

Alarms

Alarm settings - silence time, suspend time, etc. This requires a password to
enter (see “Settings” on page 101).

System

Time and date settings and unit preference (cm/in, kg/lb). This screen also
gives the option to save the current settings as the user default settings, and
the option to display the event log screen. This screen requires a password
to enter (see “Settings” on page 101).

Communications, Service and Factory

These menu options are for service and factory personnel and can only be
accessed by password only. Details are given in the service handbook.

Close Exits the setup menu.

1. The full arrhythmia option is only viewable when the full arrhythmia option is installed.

2. The recorder option is only viewable when the printer is installed.

3. The parameter options will vary according to the monitor configuration and licensed options.

4. The 12-lead resting ECG option is only viewable when the resting ECG option is installed.

5. The hemodynamics calculations option is only viewable when the cardiac output option is installed.

Directions for use Introduction 15

Waveform fields Parameter fields

Time of last

blood pressure

measurement

Blood pressure

Alarm and system

messages

Temperature

Information field
See“Information

field” following

Note

Note

Display overview

The waveform display is changed in setup menu see “Defining display

waveforms” on page 27).

The parameter fields can be changed according to licensed options, parameter
selection (see“Defining parameter fields” on page 25), and patient panel options.

16 Introduction Welch Allyn 1500 Patient Monitor

a b

Information field

Top line

The left box on the top line (a) displays the patient’s room number
(entered in the patient information screen).

The middle box (b) displays the patient mode (Neonatal, Pediatric, or
Adult) indicated by the highlighted icon.

.

Middle line

Displays the patient name.

Bottom line

Displays the current time. When mains is not connected, a battery symbol is also
displayed to the left of the time (see “Power supply” on page 22).

17

a

cb

3

Operation

Startup and initial preparation

WARNING Danger of electrical shock. Do not operate the monitor if the ground

connection is suspect or if the mains lead is damaged or suspected of being
damaged.

WARNING Network the monitor to an Acuity Central Station only. Connecting to

other networks could damage the monitor or injure the patient. If in doubt about
the network jacks or devices, consult your facility’s Biomedical Engineering
Department.

Connections

1. Connect the mains cable to the rear of the monitor (a).

2. Ethernet connection (b) (not enabled).

3. Connect the potential equalization (ground) cable to the central potential equalization

lug (c).

Caution Ensure that the patient or any person with simultaneous patient

contact does not come in contact with conductive parts of any connectors
including the RJ45 connector and the USB connector when the cover is opened.

18 Operation Welch Allyn 1500 Patient Monitor

Note

a

b

c

Inserting recorder paper

The monitor is delivered without printing paper installed. Only use original Welch
Allyn printing paper. The thermal paper is sensitive to heat, humidity, and
chemical vapors. Store the paper in a cool, dry and chemical free area.

1. Pull the locking catch (a) to the front. The paper tray is unlocked.

2. Pull the paper tray out.

3. Insert paper and pull the beginning of the paper out. Make sure that the paper mark

(b) is facing to the top.

4. Reinsert and close the tray. Be sure that the paper lies exactly between the rails (c)

Directions for use Operation 19

Switching the monitor on or off

Switching the monitor on

To turn the monitor on, press the On/Off button .

Switching the monitor off

To turn the monitor off, press the On/Off button for approximately 4 seconds. The

following message is displayed when the monitor is shutting down.

Initial Power up

1. Press the On/Off button (confirmed by a beep).

2. Confirm the New Patient dialogue with Yes or No.

• Yes: Previous patient information is deleted. The patient information can be

• No: Previous patient information, if any, is used.

3. Check the settings.

entered via the setup menu (Setup > Patient information (see “Patient

information” on page 107).

20 Operation Welch Allyn 1500 Patient Monitor

Note

Note

Initial settings

Caution Only authorized personnel, trained in the operation of this monitor, are

qualified to do the setups in the following menu.

Alarm and general settings are given in the setup menu. Initial monitor settings may
include general alarm settings (alarm silence time, alarm delay time, etc.), and general
monitor settings (height and weight units, time and date, etc.).

Access the setup as follows:

1. Pr e s s t h e Setup button .

2. Use the trim knob to select parameters and change values. Press to confirm the
selection and settings

• The alarm settings are given in the setup menu: Administrator > Alarm

• The system settings are given in the setup menu: Administrator > System

The alarm and the system sub-menu are password protected. The password for

both of these is 49, 48, 46.

Details of the setup menu and the passwords are given in the settings section
(see “Settings” on page 101).

Directions for use Operation 21

Note

Saving the user-defined settings as default

All monitor settings, including alarms settings, are stored until the monitor is switched off.
To save the user defined settings as default,

1. Press the Setup button .

2. Select Administrator > System > Save User Defaults.

The system menu is password protected. The password is 49, 48, 46.

3. Confirm with ok:

Restoring the user settings

1. Press the Setup button .

2. Select Restore User Defaults. You are prompted to confirm:

22 Operation Welch Allyn 1500 Patient Monitor

a b

Note

Power supply

Mains connected

When the mains supply is connected, the mains LED is illuminated (a). When the mains
supply is connected, and the battery is recharging both mains LED (a) and the battery
LED (b) are illuminated.

For battery recharging see “Recharging the battery” on page 91.

Mains interrupted

If the mains supply is interrupted, the monitor automatically switches over to
battery operation. The user settings are maintained.

Disconnect from the mains

To isolate the monitor from the mains, disconnect the mains cable.

Directions for use Operation 23

• Full = between 87.5% and 100% capacity.

• 3/4 full = between 62.5% and 87.5% capacity.

• Half full = between 37.5% and 62.5% capacity.

• 1/4 full = between 12.5% and 37.5% capacity

• Empty = between 0% and 12.5% capacity.

Visual Alarm Indicator

Battery operation

Two batteries are available for the monitor:

• Lithium-Ion battery: This type of battery will provide power for approximately two

hours when fully charged.

• Lead acid battery: This type of battery will provide power for approximately one hour

when fully charged.

When running on battery power the battery symbol is displayed next to the time. The
battery indicator gives an approximate guide to the capacity of the battery:

When the battery capacity is close to depletion:

• the alarm message Battery low appears

• the battery symbol flashes

• an audible alarm beep is heard

• the visual alarm indicator flashes blue

• After a few minutes if the monitor is not connected to the mains supply, the message
Battery nearly depleted is displayed and a continuous beep is heard; the monitor

switches off. If mains is connected during this period the monitor remains on.

Connect the monitor to the mains supply. For battery recharging, see “Recharging the

battery” on page 91.

24 Operation Welch Allyn 1500 Patient Monitor

Note

Note

Note

Standby mode

WARNING In standby mode, vital signs data and alarms are no longer displayed

or collected.

In standby mode, patient monitoring is temporarily interrupted. Confirmed patient
information is saved.

Patient information that has not been confirmed is lost when standby mode is
entered.

1. Pr e s s t h e Standby button . The following screen is displayed:

The standby message is continuously displayed while the unit is in standby mode.

2. To exit standby mode press any button. You are prompted to confirm the same patient
or enter a new patient.

After exiting standby mode, ensure that the NIBP intervals are re-armed by
manually starting an NIBP measurement.

Directions for use Operation 25

Defining parameter fields

1. Press the Setup button .

2. Select Parameters.

The screen will vary according to the licensed options:

• etCO

•The Masimo settings enabled (yes / no), gives extra settings for SpO2

•The Temperature options are only available when two temperature connectors are

•The IBP options are only available when four IBP connectors are installed on the

, ST and CO are only displayed when the options are licensed.

2

measurement (see “SpO2 monitoring” on page 67) and is only displayed when the
Masimo module is installed.

installed on the patient panel.

patient panel.

26 Operation Welch Allyn 1500 Patient Monitor

RR or when enabled, etCO

2,

measurement, ST measurement,
or both ST and etCO

2

measurements.

Two or four IBP measurements
(or this area is left blank when
no IBP measurement are
selected).

Cardiac Output measurement
(when enabled).

T1, T1 and T2, or T1 and T

Parameter field display

• When etCO2 is enabled, the CO2 parameter replaces the RR parameter below the
heart rate.

• When the ST parameter is enabled, the ST parameter replaces the RR value and the
RR value is moved below the ST parameter.

• When both etCO

and ST parameters are enabled, both values are displayed below

2

the heart rate (RR is not displayed).

• When IPI is enabled, the value is displayed below the CO

.

2

• When four IBP connectors are available the number of IBP measurements displayed
can be set, that is, no IBP measurements displayed, two measurements displayed, or
four IBP measurements displayed (see previous page).

• When two temperature connectors are available, one (T1), two (T1 and T2) or T1 plus
the temperature difference can be displayed (T1 plus T).

Directions for use Operation 27

Note

Note

Defining display waveforms

1. Press the Setup button .

2. Select Waveform Area.

3. The waveforms are configured through the pull-down menus.

4. Set the amplitude for each waveform according to preference and signal strength. Set
the sweep speed (for all waveforms) according to preference and patient.

The RESP and SpO2 sweep speed values are not configurable.

5. Select OK to save.

• The number of waveforms that can be displayed will depend on the
configuration of the monitors and the options licensed and enabled. Either 4,
5, 7 or 8. waveforms can be displayed.

• Waveforms P1, P2, P3, P4, CO
the display parameter fields (see “Defining parameter fields” on page 25).

and ST are only displayed when selected in

2

28 Operation Welch Allyn 1500 Patient Monitor

Waveform 1 - ECG (I, II, III, V, aVL,
aVR, aVF)

Waveform 2 - ECG, RESP, CO2, ST
or Trend (“Trend data” on page 29)

Waveform 3 - ECG, RESP, Trend,
CO

2

, or SpO2

(Waveform 4- ECG, Trend, or SpO

2

)

Waveform 4 to 7 (5 to 8) - P1 to P4,
or P1 and P2, or no IBP waveform
displayed. P1, P2, P3, P4 will be
displayed as selected for
parameter measurement (see

“Defining parameter fields” on

page 25.)

Waveform display

The waveforms that can be configured are as follows:

Waveform
position

1 •

2 •••••

3 •••• •

4 ••••

5 ••

6 ••

7 ••

8 •

• RESP in waveform 2 can only be displayed when etCO

• When ST is enabled SpO
SpO

2

ECG RESP CO2 Trend ST SpO2 P1 P2 P3 P4

is not enabled.

2

is available for waveform 4 only. When ST is not enabled

2

is available for waveform 3 only.

• When resting ECG is enabled, ECG waveform can also be set in waveform 4.

• Waveforms P1, P2, P3, P4 are displayed when selected in the parameter
measurements fields and shown in waveform fields 4, 5, 6 and 7 or 5, 6, 7 and 8 only.

• The size of the waveforms are automatically adjusted for the number of waveforms
displayed.

Directions for use Operation 29

Note

Trend data

The monitor records up to 24 hours of trend data at one-minute intervals. The trend values
are displayed at the user defined interval (see below) and additionally after every manual
NIBP measurement.

• Trend data is deleted when a new patient is entered.

• When the memory is full, the oldest trend data is overwritten.

• The display interval for the trend table can selected for intervals of one minute, five
minutes, 15 minutes, one hour, or four hours.

Trend data display and settings

Press the Trend button .

• Previous measurements are displayed using the up and down icons.

• Use the trim knob to select the trend display interval with the pull down menu in the

Interval setting.

•The Clear option deletes all stored trend data.

•The Print option prints the trend data.

The data recorded will depend on licensed and enabled options and the number
of IBP and temperature connectors installed on the monitor (see “Defining

parameter fields” on page 25).

30 Operation Welch Allyn 1500 Patient Monitor

Note

Displaying trend data in the measurements screen

The HR trend can also be displayed in the waveforms:

Press the Setup button . and select Waveforms. Scroll down for more options.

The trend data can be displayed in waveform 2 or 3 (or 4 if ST is enabled):

Trend data can be displayed for any of the following:

• Heart rate

• RR (see example above)

•etCO

•fiCO

• IPI when selected in parameter display)

•SpO

• P1, P2, P3 P4

•NIBP

•T1

• T2 (when selected in parameter display)

• T (when selected in parameter display)

• CO or CI (when selected in parameter display)

2

2

2

When the trend waveform is displayed and it is highlighted and selected with
the trim knob (see next page), options appear at the bottom of the waveform (as
shown on the example above) to:

• Change the interval (15 mins to 24 hours)

• Change the waveform scale

• Obtain a printout.

Directions for use Operation 31

Settings via a parameter field

1. Select the desired parameter measurement field using the trim knob. A white frame

appears around the selected field.

2. Press the trim knob to display the menu. The following example is displayed when

the heart rate settings screen is selected. Other setting screens are similar:

3. The settings can be saved as default (see “Saving the user-defined settings as

default” on page 21).

32 Operation Welch Allyn 1500 Patient Monitor

33

Visual alarm indicator

Text Display

Parameter Field

4

Alarms

Display of alarms

During initial powerup

No alarms are displayed if no patient is being monitored.

During monitoring

There are three alarm priorities:

Alarm type Priority LED visual alarm

indicator

Technical Low Blue Single deep tone

Parameter Medium Yellow (flashes with

parameter field)

Parameter High Red (flashes with

parameter field)

Lethal High Red (flashes with

parameter field)

Audible signal Display

every 2 seconds

Two tone high/low
every second.

Three high tones
every second.

Three high tones
every second.

Text display in the alarm status field at the
bottom.

Text display in the alarm status field at the
bottom.

Yellow flashing parameter field.

Text display in the alarm status field at the bottom

Red flashing parameter field.

Text display in the alarm status field at the bottom

Red flashing parameter field.

34 Alarms Welch Allyn 1500 Patient Monitor

Silencing an alarm

Acknowledging an alarm

Alarm Limit

Press the Alarm button to silence the alarm. The audible alarm is silenced for 1, 1.5

or 2 minutes. The visual parameter alarm continues to be displayed.

Press the Alarm button again to resume the alarm.

After the defined silence time, the audible alarm is reactivated. The silence time is

defined in Setup > Setup Administrator> Alarms > Alarm Silence Time (see

“Administrator” on page 108).

Technical Alarm

A technical alarm can be acknowledged by pressing the Alarm Silence button . This

alarm is not reactivated.

Suspend all alarms

The Alarm suspend is used to deactivate all alarms caused by for example, disconnecting
patient cables, loose electrodes or relocation of the patient. The alarm is suspended for a

duration of 1, 1.5, or 2 minutes. During this time the message Alarms Suspended is

displayed.

The alarm suspension time is defined in the menu Setup > Administrator> Alarms >
Alarm Suspend Time (see “Administrator” on page 108).

1. Pr e s s t h e Setup button .

2. Select Alarm Suspend.

A message is given in the message bar indicating that the alarms have been
suspended.

If you wish to reactivate the alarms before the set duration, press the Setup button again

. The menu entry is changed to Alarm Resume. Select this option to reactivate the

alarms.

Directions for use Alarms 35

Note

Turning off an individual parameter alarm

WARNING The audible alarm is silenced permanently. The settings are not

reset. Physiological alarms of the patient are silenced. Use this function only if
disconnecting a sensor from the patient for a long period of time.

1. Individual alarms can be inhibited via the Alarms menu (see below) and in any
parameter measurement field by using the trim knob to select a parameter (a white
frame appears around the selected field) and pressing the trim knob to display the

menu for that parameter.

2. Switch off an individual limits by selecting the limit setting and rotating the trim knob
to the maximum limit until off is selected.

3. The alarm off symbol is displayed in the respective measurement field.

Alarm Volume

The alarm volume is set in the setup menu.

1. Press the Setup button .

2. With the trim knob, select the menu option.

3. Press the trim knob to display the speaker volume.

The speaker volume is set on a scale of 1 to 10. The volume is heard when scrolling
through the values.

A setting is available in the administrator menu, that prevents the HR / PR alarm
from being switched off (see “Administrator” on page 108).

36 Alarms Welch Allyn 1500 Patient Monitor

Note

Note

Note

Alarm limit setting

All alarm limits are reset to the default settings after confirming a new patient
(see “Standby mode” on page 24).

1. Press the Setup button .

2. Select the menu item Alarms.

3. Use the trim knob to scroll through the alarm settings and select the limits.

Individual parameter alarm limits can be set in the parameter menu (see

“Monitoring and Measurements” on page 39).

The Alarm settings for arrhythmia are detailed in the Arrhythmia menu option in
the setup menu.

Directions for use Alarms 37

Note

Physiological alarms

Alarm abbreviation Description Priority

SpO

low/high Oxygen saturation of the blood Medium

2

PP low/high Peripheral pulse of SpO

2

RRECG low/high Respiration rate impedance Medium

Apnea limit Apnea time limit exceeded Medium

low/high Inspiratory CO

CO

2

low/high Capnographic respiration rate Medium

RRCO

2

etCO

low/high End-tidal expiratory CO

2

2

2

NIBPs low/high Systolic blood pressure Medium

NIBPm low/high Mean average blood pressure Medium

NIBPd low/high Diastolic blood pressure Medium

HR low/high Heart rate Medium

Pxs Art low/high Invasive systolic blood pressure Medium

Medium

Medium

Medium

Pxm Art low/high Invasive mean blood pressure Medium

Pxd low/high Invasive diastolic blood pressure Medium

Temp low/high Temperature in degrees Fahrenheit or degrees Celsius. Medium

All technical alarms are low priority.

38 Alarms Welch Allyn 1500 Patient Monitor

39

Note

Note

5

General

Monitoring and Measurements

Caution The guidelines in this section are given as an overview only. They are

not a substitute for, nor do they overrule manufacturer documentation and
instructions or departmental procedures.

Values are only displayed when the ECG cable or at least one sensor is
connected. If a sensor is disconnected, a technical alarm is issued. The measured
value will no longer be displayed if the sensor is disconnected and the alarm is
acknowledged.

• Connect the ECG electrodes, the NIBP cuff, the SpO2 sensor, the CO2 sensor, and
the temperature sensor to the patient as required.

• As soon as the sensors are connected, the corresponding indication appears on the
display.

• Check or set the alarm limits (see “Alarms” on page 33).

This section gives a general overview of the parameters that can be measured
with the monitor. It is aimed at medical professionals and no specific medical
direction is given or implied; any instructions given here do not overrule local
medical directives.

The individual parameter menu settings are selected with the trim knob,
described previously (see “Settings via a parameter field” on page 31).

40 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

Note

Note

©

ECG

WARNING In order to minimize interference and the danger of burns to the

patient, only use Welch Allyn ECG cables. Keep the ECG cable as far away as
possible from any electrosurgical cables. Make sure that the electrosurgical
return conductor (neutral) is properly attached to the patient and that good
contact is made.

Patient preparation

The quality of the ECG reading is dependent on the degree of contact resistance between
the electrode and the skin. To ensure the lowest resistance consider the following
actions:

1. Shave the areas where the electrodes are to be placed.

2. Use alcohol to thoroughly clean the areas where the electrodes are to be placed.

3. When applying the electrodes, make sure that there is a layer of gel between the
electrode and the skin.

To maintain the quality of signals during long-term monitoring, the electrodes
should be replaced at least every 48 hours. Over longer periods, the electrode gel
can dry out and the patient’s skin can be irritated by the gel or adhesive. When
replacing electrodes, do not position the new electrodes on exactly the same
locations, but a little to the side of the original positions.

Connecting the ECG patient cable

• When an electrode falls off or the resistance of an electrode is too high, a
lead-off indication is displayed and an audible alarm is issued.

• Color code: the colors shown here are according to IEC requirements. The
AHA color configuration is shown in “Electrode identification and color code

IEC/AHA” on page 43.

WARNING Patient harm. The monitor is type CF and protected only when

approved Welch Allyn patient cables are used.

Caution Only use approved Welch Allyn patient cables. Use of other cables can

damage the monitor.

Directions for use Monitoring and Measurements 41

3-lead

5-lead

42 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

Note

12-lead

This graphic shows the IEC color configuration. The AHA (U.S.) color configuration
is shown in “Electrode identification and color code IEC/AHA” on page 43.

Directions for use Monitoring and Measurements 43

Electrode identification and color code IEC/AHA

The electrode placements shown in this manual are labelled with the colors according to
IEC requirements. The equivalent AHA colors are given below.

IEC (Europe) AHA (U.S.)

System Electrode

identifier

Limb R Red RA (right arm) White

L Yellow LA (left arm) Black

F Green LL (left leg) Red

Chest C1 White/Red V1 Brown/Red

C2 White/Yellow V2 Brown/Yellow

C3 White/Green V3 Brown/Green

C4 White/Brown V4 Brown/Blue

C5 White/Black V5 Brown/Orange

C6 White/Violet V6 Brown/Violet

Neutral N Black RL (right leg) Green

Color Electrode

identifier

Color

44 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

Red (R)

Green (F)

Yellow (L)

White (C)

Black (N)

Pacemaker monitoring

WARNING Patients with a pacemaker must be observed continuously because

the heart rate from the pacemaker might still be registered in case of a cardiac
arrest or some arrhythmias. See specification “Technical data” on page 117 for
disclosure of the pacemaker pulse rejection capability of this monitor.

WARNING Pacemaker monitoring is not possible with ECG cables that have un-

shielded lead wires. Ensure that only shielded lead wire ECG cables are used
when monitoring patients that have a pacemaker.

WARNING Welch Allyn recommends using an SpO

ECG measurement and to set the alarm range for the peripheral pulse (PP) in the
range of the heart rate (HR), or to set the HR source in the SpO
(see “SpO

settings” on page 69.)

2

3- and 5-lead cables for pacemaker patients

The following illustration shows the electrode placement with a 5-lead patient cable for
optimum results for patients with an implanted pacemaker.

With a 3-lead patient cable, only R, L and F are connected.

sensor in addition to the

2

menu to SpO2

2

IEC AHA

Black (N) Green (RL)

Red (R) White (RA)

Yellow (L) Black (LA)

Green (F) Red (LL)

White (C) Brown (V)

Directions for use Monitoring and Measurements 45

Note

aa

Activating the pacer display

1. Select the HR measurement field using the trim knob. A white frame appears around
the measurement field.

2. Press the trim knob to display the menu.

3. Scroll down to the pacer display option and select yes.

Pacemaker spikes are presented as vertical lines (a) on the ECG trace. These vertical lines
represent neither magnitude nor duration of the pacemaker pulse but are purely time
relative.

The Analyze Pacer setting is not applicable.

46 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

ECG display

ECG traces can be displayed in waveforms 1, 2 and 3. The waveform lead and size is
defined in the waveform display menu (see “Settings via a parameter field” on page 31).

1. P r e s s t h e Setup button .

2. Select Waveforms.

Directions for use Monitoring and Measurements 47

Note

12-lead resting ECG (option)

With this option it is possible to record a 12-lead resting ECG. One resting ECG can be
stored at a time. The resting ECG cannot be viewed on the monitor but can be printed on
the internal printer.

The 12-lead resting ECG is an option and only appears in the setup menu when
enabled.

Taking a resting ECG

1. Press the Setup button .

2. Select 12-lead ECG.

3. Check electrode status. Ensure the green On is displayed for all electrodes - this
indicates that the electrode resistance is within acceptable range to obtain a valid
reading.

4. Select Start 12-lead Resting ECG. The message Rest ECG Analysis - in Progress is
displayed while the resting ECG is being taken. This is followed by Rest ECG -

Complete.

5. The resting ECG is saved in memory until a new patient is defined or the ECG is
overwritten with a new recording.

48 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

Note

Note

ECG menu settings

The parameter settings are selected with the trim knob. (See “Settings via a

parameter field” on page 31).

The default settings are in bold.

Main menu Parameter Description

Setup HR ECG Lead Lead selection I,

Size 0.5, 1, 2, 4 mV/cm

HR/PR source

HR/PR Tone
ECG Filter Select Diagnostic or Monitor

1

1

ECG, SpO

2

Off/ on

Two predefined filter settings can be selected. These defined
filter options define the cut off frequency for the Myogram,
Baseline and Mains filters. The filter definitions and the
corresponding filter cut-offs are defined as follows:

II, III, V, AVL, AVR, AVF

, P1

2

Baseline Myogram Mains

Diagnostic 0.05 Hz 150 Hz as set
Monitor 0.50 35 Hz as set

Single ECG Yes/No, select lead I, II, III, or V. Select this option to analyze one

ECG lead.

Pacer Display Yes/No displays pacer pulses relative to time but not

representative of either amplitude, duration or polarity.

Analyzer Pacer Yes/No - not applicable.

HR lower / upper

3

limit

Cal Generates a simulated 1 mV calibration impulse on the curve.

1. This can also be set in the setup SpO2 menu.

2. If SpO2 is selected, the pitch of the beep corresponds to the SpO2 saturation. A high pitched beep indicates a high

saturation.

3. The lower limit cannot be set to a higher value than the value set for the upper limit, and vice versa.

Range: 25 - 250
Lower limit default 50
Upper limit default 120

A setting is available in the administrator menu that prevents the HR / PR alarm
(upper / lower limit) from being switched off (see “Administrator” on page 108).

Directions for use Monitoring and Measurements 49

ECG alarms and messages

Message Possible cause Suggested action

HR – asystole/ASY No QRS detected for 4 seconds. Check the patient.

ECG signal lower than 0.5 mV.

HR – ventricular
fibrillation/VF

HR – artifact Patient has moved. Calm the patient.

HR > [upper limit]
HR < [lower limit]

HR – lead off Electrode lose/defective. Check and reapply/replace electrodes.

No organized ventricular rhythm
detected.

Bad electrode. Checking the electrode pads.

Interferences by other devices. Remove source of the interference.

Heart rate higher/lower than
alarm limit.

Patient cable defective. Replace the patient cable.

Check the patient.
ECG signal lower than 0.5 mV.

Check the patient.

50 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

Note

Arrhythmia

Arrhythmia settings

The full arrhythmia menu is only displayed when the full arrhythmia option is
licensed. When the full arrhythmia option has not been enabled, settings are
made for VFib, Asystol and Vtach only.

1. Press the Setup button .

2. Select Arrhythmia.

The default settings are in bold.

Main menu Parameter Description

Setup Arrhythmia VFib Alarm Level - Lethal (cannot be changed), Print

Asystole Alarm Level - Lethal (cannot be changed), Print

VTach VTach Limit 100 to 200 (125), Alarm Level - Lethal

PVC run PVC run 3 to 6 (6) Alarm Level (High, Medium,

VRyhthm Alarm Level (High, Medium, Low, Off), Print on

Couplet Alarm Level (High, Medium, Low, Off), Print on

PVC/min PVC/min 1to 30 (30) Alarm Level (High, Medium,

Bigeminy Alarm Level (High, Medium, Low, Off), Print on

on alarm Yes/No.

on alarm Yes/No.

(cannot be changed), Print on alarm Yes/No.

Low, Off), Print on alarm Yes/No.

alarm Yes/No.

alarm Yes/No.

Low, Off), Print on alarm Yes/No.

alarm Yes/No.

Directions for use Monitoring and Measurements 51

Main menu Parameter Description

Setup Arrhythmia
(continued)

Options Irregular Limit Yes/No, set limit between 45 and 120 (45)

Trigeminy Alarm Level (High, Medium, Low, Off), Print on

alarm Yes/No.

Tachycardia Tachycardia 150 to 250 (180) Alarm Level (High,

Medium, Low, Off), Print on alarm Yes/No.

Bradycardia Bradycardia 20 to 100 (45) Alarm Level (High,

Medium, Low, Off), Print on alarm Yes/No.

Pause Alarm Level (High, Medium, Low, Off), Print on

alarm Yes/No.

Irregular (irregular rhythm) Alarm Level (High, Medium, Low, Off), Print on

alarm Yes/No. This is an irregularity in the R to R
interval over a series of at least 16 non­ventricular beats. The number of beats analyzed
is given in options.

Non-capture (pacemaker
non-capture)

Alarm Level (High, Medium, Low, Off), Print on
alarm Yes/No. This is for pacemaker patients
with the analyze pacers option enabled (see
options below) - a beat does not directly follow a
pacer.

Single ECG Yes/No, select lead

option to analyze one ECG lead.

Pacer Display Yes/No displays pacer pulses relative to time but

not representative of either amplitude, duration
or polarity.

Analyze Pacers Yes/No enables non-capture (see above).

Arrhythmia OFF Sets all alarms to off except VFib, Asystole and

VTach which remain set at the highest alarm
level.

Presets Resets all arrhythmia settings to the default.

ST / ARR Relearn Approximately 15 - 20 complexes are used to set

the parameters (duration, amplitude, etc.) for
Arrhythmia analysis. Select this option to
redefine the template used.

I, II, III, or V. Select this

52 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

Note

ST measurement (option)

The ST segment represents the period from the end of ventricular depolarization to the
beginning of ventricular repolarization. The ST segment lies between the end of the QRS
complex and the initial deflection of the T-wave. It is normally isoelectric.

ST Analysis is a useful diagnostic tool because it may provide an early indication of
myocardial ischemia or infarction.

ST Analysis is an algorithm that analyzes the offset of the ST segment from the ECG
signal of normal beats. The offset of a reference beat is measured in millivolts (mV) (or
millimeters) with respect to the isoelectric level of the ECG waveform; the offset of
subsequent beats is measured relative to the reference beat.

The reference beat is originally obtained by learning the patient’s normal morphology, but
it can be modified by the clinician at any time using the re-learn option in the ST Analysis
Setup Window (see next page). When re-learn is selected reference beat is updated to
the current morphology.

ST re-learn is also initiated by arrhythmia re-learn.

The ST measurement is made at a point 60 or 80 milliseconds (ms) after the J-point (see
next page).

The J-point is the point on the ST segment where the slope changes (marking the end of
the QRS and the beginning of the ST segment.

Directions for use Monitoring and Measurements 53

Note

ST settings

ST measurements can only be displayed when the full arrhythmia and ST option is
licensed, and when ST is enabled in setup parameters (See “Defining parameter

fields” on page 25).

The parameter settings are selected with the trim knob, described previously (see

“Settings via a parameter field” on page 31).

The default settings are in

Main menu Parameter Description

Setup ST ST Relearn Reanalyzes the QRS complexes to determine

bold.

base measurement levels.

ST Lead 1 Define the lead for measurement 1 (default lead

II).

ST lead 2 Define the lead for measurement 2 (default lead

V).

ST Measurement point Auto, 60, 80. Define the measurement point (ms

after the j-point).
Note: When Auto is defined, the measurement
point is set to either 60 or 80 ms. This is
dependent on the results of an algorithm that
builds a hysteresis counter based on the
patient's average heart rate - a faster heart rate
is set at 60 ms.

Lower limit / upper limit Range: -10 to +10

Lower limit default -1

Upper limit default +1
Alarm level Off, Low, Medium, High.
Print on alarm Yes, No.

Presets Select to return all ST settings to the defaults.

ST alarm messages

Alarm Possible cause Suggested action

ST > [upper limit]
ST< [lower limit]

ST is higher or lower than the
alarm limit.

Check the patient.

54 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

Note

Note

Respiration rate

The RR measurement field is not displayed if the etCO2 field is enabled.

If the RR should be measured via the ECG instead of etCO2, the etCO2 measurement
field must be deactivated as follows:

Press the Setup button , select Parameters and deactivate etCO

The RR signal is measured via the R (RA) and F (LL) electrodes of the ECG cable
(impedance measurement). After the patient is connected, about 30 seconds can
elapse before a reliable value is displayed.

Respiration rate settings

The parameter settings are selected with the trim knob, described previously (see

“Settings via a parameter field” on page 31).

The default settings are in bold.

Main menu Parameter Description
RESP Enabled Display RR measurement Yes, No. When the respiration is not

Apnea Apnea time 6, 10, 15, 20, 25, 30 seconds.

Setup RR Lower limit / upper limit Range: 2- 150

(No).

2

enabled, (Disabled) is displayed in the
measurement screen.

Lower limit default 5
Upper limit default 30

Directions for use Monitoring and Measurements 55

Respiration rate alarms and messages

Message Possible cause Suggested action

RR out of range (too
high)

RR lead off Electrode loose/defective. Check and reapply/replace electrodes.

RR artifact Patient has moved. Calm the patient.

RR > [upper limit]
RR < [lower limit]

The patient's RR is too high for
accurate measurement.

Electrical interferences from
other devices.

Signal disturbed due to frequent
artifacts caused by bad
electrode contact.

Interferences by other devices. Remove source of the interference.

Bad electrode. Check/replace electrodes.

RR is higher or lower than alarm
limit.

Check the patient.

Remove source of the interference.

Check and reapply/replace electrodes if
required.

Check the patient.

56 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

Note

Capnography

The capnography module is intended to provide professionally trained health care
providers with continuous, non-invasive measurement and monitoring of carbon dioxide
concentration of the expired and inspired breath and respiration rate. It is intended for use
with neonatal, pediatric, and adult patients.

The etCO2 menu is only displayed when the etCO2 option is enabled. If the etCO2
measurement field is not displayed ensure it is enabled in the parameter settings.

Safety

Press the Setup button , enter the menu Setup/Parameters and activate etCO

Only use Welch Allyn approved accessories for etCO2 monitoring.

WARNING Carefully route the sampling line to reduce the possibility of patient

entanglement or strangulation.

WARNING The sampling line may ignite in the presence of oxygen when

directly exposed to laser, electro-surgical devices, or high heat. When performing
head and neck procedures involving laser, electrosurgical devices or high heat,
use with caution to prevent flammability of the sampling line or surrounding
surgical drapes

.

2

WARNING When using a sampling line for intubated patients with a closed

suction system, do not place the airway adapter between the suction catheter
and endotracheal tube. This is to ensure that the airway adapter does not interfere
with the functioning of the suction catheter.

WARNING Loose or damaged connections may compromise ventilation or

cause an inaccurate measurement of respiratory gases. Securely connect all
components and check connections for leaks according to standard clinical
procedures.

WARNING Do not cut, remove any part, bend or crush the sampling line. This

could lead to erroneous readings.

Directions for use Monitoring and Measurements 57

WARNING If too much moisture enters the sampling line (i.e., from ambient

humidity or breathing of unusually humid air), and the sampling line cannot be
cleared, the message Blockage appears in the message area. Replace the
sampling line once the sampling line blockage message appears.

Caution In high-altitude environments, etCO

values may be lower than values

2

observed at sea level. When using the monitor in high altitude environments, it is
advisable to consider adjusting EtCO

Caution Microstream

®

etCO2 sampling lines are designed for single patient

alarm settings accordingly.

2

use, and are not to be reprocessed. Do not attempt to clean, disinfect, sterilize or
flush any part of the sampling line as this can cause damage to the monitor.

Caution Dispose of sampling lines according to standard operating procedures

or local regulations for the disposal of contaminated medical waste.

Caution Before use, carefully read the Microstream etCO

sampling lines

2

Directions for Use.

Caution Only use Microstream etCO

sampling lines to ensure the monitor

2

functions properly.

Caution Dispose of Microstream etCO

sampling lines according to standard

2

operating procedures or local regulations for the disposal of contaminated
medical waste.

Caution During nebulization or suction for Intubated patients, in order to avoid

moisture buildup and sampling line occlusion, remove the sampling line luer
connector from the monitor.

Caution Replace the sampling line according to hospital protocol or when a

blockage is indicated by the monitor. Excessive patient secretions or a build-up of
liquids in the airway tubing may occlude the sampling line, requiring more
frequent replacement.

58 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

Preparing the Oridion sensor

Basic principles for choosing microstream CO

When choosing Microstream CO2 sampling lines, the following should be considered:

• The condition of the patient (ventilated or not ventilated)

• If the patient is ventilated, whether ventilation is humidified or non-humidified

• Patient’s size and weight

• The probability that the patient will switch between oral and nasal breathing

• Duration of use

• For best results, for short term monitoring, use Microstream CO
orange connectors. For long term monitoring, use Microstream CO
with yellow connectors.” Products that include an “H” in the name are intended for
long term use.

Select the appropriate sampling line and connect it to the monitor before putting on the
patient. Be sure to follow the directions for provided with the sampling line.

For further information, please contact your local representative.

Connecting a sampling line

The appropriate sampling line must be connected to the monitor and to the patient.
Connect as follows:

1. Slide open the sampling line input connector shutter and
connect the appropriate sampling line.

sampling lines

2

sampling lines with

2

sampling lines

2

2. Screw the sampling line connector into the monitor clockwise
until it can no longer be turned.

3. Connect the sampling line to the patient as described in the
Directions for Use supplied with the sampling line.

When the sampling line is connected, the monitor will immediately begin to search for
breaths, but it will not indicate a No Breath condition before any valid breaths have
occurred.

CO2 data displayed by the monitor

The monitor Home screen displays real time CO

•Real time etCO2 values along with selected units and alarm settings

• Respiration rate (RR) in breaths per minute and alarm settings

•

Real-time FiCO

•CO

Waveform if enabled (see “Waveform display” on page 28)

2

• IPI value if enabled (see following).

values along with selected units and alarm settings

2

data. The displayed data includes:

2

Directions for use Monitoring and Measurements 59

etCO2 settings

The parameter settings are selected with the trim knob, described previously (see

“Settings via a parameter field” on page 31).

The default settings are in bold.

Parameter Description
Size 0 to 40 mmHg, 0 to 60mmHg, 0 to 80mmHg.
Units mmHg/kPa.
Apnea time 6, 10, 15, 20, 25, 30 seconds.

EtCO2 lower /upper limit Range: 0- 99 mmHg

RR lower limit / upper limit Range: 2- 150

FiCO

upper limit 2 - 25 mmHg (5 mmHg / 0.7 kPa).

2

Lower limit default 25 mmHg / 3 kPa)
Upper limit default 60 mmHg / 8 kPa.

Lower limit default 5
Upper limit default 30.

60 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

Integrated Pulmonary Index (IPI) settings and measurement

The capnography module provides the clinician with an integrated pulmonary index (IPI).
The IPI is based on end tidal carbon dioxide, respiration rate, oxygen saturation and heart
rate. The IPI is a single index of an adult or pediatric patient's ventilatory status displayed
on a scale of 1 - 10, where 10 indicates optimal pulmonary status. IPI monitoring displays
a single value that represents the patient's pulmonary parameters and alerts clinicians to
changes in the patient's pulmonary status.

IPI provides an uncomplicated, inclusive assessment of a patient’s
ventilatory and oxygenation status. By following the trend of the
IPI, a clinician can quickly assess the inter-relations of a patient’s
respiratory parameters.

IPI also provides an early indication of changes in a patient’s
respiratory status that may not be indicated by the values of the
individual parameters.

IPI is only supported in adult and pediatric mode. When patient
mode is set for neonatal, IPI cannot be enabled. Patient mode is
defined in the setup menu (mode see “Patient mode” on
page 107). When pediatric is set, there are three pediatric sub­modes based on age. It is important to choose the patient age
group to which the current patient belongs (see below).

IPI settings

Since the IPI uses data from the monitoring of both CO

and SpO2,

2

it will only be available when both parameters are available and RR
and PR are being calculated from these parameters.

The parameter settings are selected with the trim knob, described previously (see

“Settings via a parameter field” on page 31).

The default settings are in bold.

Parameter Description

IPI Enabled

1

No/yes. When enabled the measurement appears below the etCO
measurement. The lower limit is displayed after the measurement.

2

Age range

Lower limit 1 to 9 (default

1. IPI can only be enabled when patient mode is set to either adult or pediatric

2. Age range is only applicable when the patient mode is set to pediatric. When patient mode is set to adult this option

2

is greyed and cannot be entered.

1 to 3, 3 to 6, 6 to 12.

4)

Directions for use Monitoring and Measurements 61

Note

Assessing the IPI value

IPI can provide an early indication of a change in ventilatory status which may not be
shown by the current value of any of the four parameters individually. The IPI is designed
to summarize information regarding patient status, possibly before etCO
PR values reach levels of clinical concern. While the IPI highlights a change in ventilatory
status, the root parameters are still required to understand patient status. It is important
to note that different conditions can cause similar IPI values.

The IPI trend graph displays the patient ventilatory status trend in one graph, and thus can
alert you to changes in patient status. The importance of the IPI therefore, lies not only in
its absolute numeric number, but also in its relationship to previous values, so that a graph
can display an upward or downward trend in patient status and indicates that attention or
intervention may be required.

The IPI is modeled on normal healthy patients (ASA Physical Status value of 1 according to
the ASA Physical Status Classification System, as published in Relative Value Guide® ­2008 of the American Society of Anesthesiologists). Patients with ASA Physical Status
values of 3 or higher are expected to have low IPI values by definition. Therefore, for
patients with an ASA Physical Status value of 3 or higher, the IPI may have no added
value.

, RR, SpO2, or

2

The range of the IPI is 1-10; values should be understood as seen in the table below.

Index range Patient Status

10 Normal

8 - 9 Within normal range

7 Close to normal range: requires attention

5 - 6 Requires attention and may require intervention

3 - 4 Requires intervention

1 - 2 Requires immediate intervention

A graphical trend view of the IPI can be displayed. This is selected in waveforms
(see “Displaying trend data in the measurements screen” on page 30).

If patient mode is changed, all IPI trend data is purged.

62 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

etCO2 alarms and messages

l

Message Possible cause Suggested action

etCO

> [upper limit]

2

< [lower limit]

etCO

2

RR > [upper limit]
RR < [lower limit]

FiCO

> [upper limit] FiCO2 has exceeded alarm limit. Check the patient and ventilator.

2

needs calibration CO2 measurement reading too

CO

2

etCO

is higher / lower than

2

alarm limit.

RR is higher / lower than alarm
limit.

low due to:

Check the patient.

Check the patient.

Carry out calibration.

• Incorrect calibration

• Module requires calibration

IPI cannot measure CO2 measurement reading too

low.
SpO

measurement too low or

2

absent.

Check the patient.

Check SpO

measurement and sensor.

2

Directions for use Monitoring and Measurements 63

NIBP monitoring

Safety

WARNING To prevent extensive pressure on the extremity, it is very important

to:

• Choose the correct cuff size.

• Check the initial pressure in the NIBP menu. The correct initial pressure for

adults is 160 mmHg, for pediatric patients 120 mmHg, and for neonates 90
mmHg.

WARNING In case of long-term monitoring or automatic operation, the

connected body areas of the patient and the extremity to which the cuff is
attached must be checked regularly for signs of ischaemia, purpuras or
neuropathy.

WARNING The cuff must not be attached to a limb that is already used for

interventions such as infusions or SpO

measurement.

2

WARNING To prevent incorrect measurement results, make sure that the NIBP

tube is not compressed.

WARNING To achieve correct arterial pressure measurement, the cuff must

always be installed on the level of the right atrium.

64 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

Note

Note

Note

Taking a single NIBP measurement

1. P r e s s t h e NIBP start/stop button .

2. The measurement can be stopped at any time by pressing the button again.

Automatic blood pressure measurement

1. P r e s s t h e NIBP measurement interval button .

2. Select the interval between 3 minutes and 60 minutes, and confirm your selection

with OK.

3. The message NIBP interval – xx minutes is displayed.

4. The first measurement is started by pressing the NIBP start/stop button .

After exiting the standby mode, ensure that the NIBP intervals are re-armed by
manually starting an NIBP measurement.

These settings are reset when the monitor is switched off and automatic
measurement must again be defined when the monitor is switched on.

The monitor sets the maximum pressure as follows:

• Adults: 270 mmHg.

• Pediatric: 180 mmHg.

• Neonate: 150 mmHg.

The patient mode is defined in the setup menu (“Patient mode” on page 107).

Directions for use Monitoring and Measurements 65

NIBP settings

The parameter settings are selected with the trim knob, described previously (see

“Settings via a parameter field” on page 31).

The default settings are in bold.

Parameter Description
NIBP Interval Off, 3, 5, 10, 15, 30, 60
Format Sys/Dia or Mean. This defines the main measurement to be

displayed, that is the larger measurement displayed in the NIBP box.
The secondary measurement is displayed smaller by the side of the
defined measurement. Note that the mean measurement is shown in
brackets.

Initial Inflation Pressure Adult: 160

Pediatric: 120
Neonate: 90

NIBPs (systolic blood pressure)
upper/lower limit

NIBPd (diastolic blood pressure)
upper/lower limit

Range: 30 - 300
Adult 220/75
Pediatric: 145/75
Neonate: 100/50

Range: 20 - 235
Adult 110/35
Pediatric: 100/35
Neonate: 70/30

NIBPm (mean pressure) upper/
lower limit

Range: 20 - 255
Adult 120/50
Pediatric: 110/50
Neonate: 80/35

66 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

NIBP alarms and messages

Message Possible cause Suggested action

NIBP needs service No NIBP module detected. Switch off and restart.

Replace monitor.

NIBP artifact
cannot measure

Cannot measure
NIBP

NIBP cuff leak No cuff connected, or cuff or

NIBP signal low Blocked tube; kink in the tube. Check and replace the tube if required.

Patient has moved. Calm the patient.

Max. required pressure is higher
than the initial pressure of
160 mmHg.

Patient has moved. Check and calm patient.

Very unsteady pulse. Apply cuff to another extremity with less

Air tube plugged or leaking. Check tube and cuff.

insufficiently fitted or defective.

Cuff not applied correctly. Reposition/check the cuff.

1

Repeat measurement. The monitor will
automatically increase the initial pressure.

movement and steady pulse.

Check cuff position.

Check cuff for tightness.

Check if the cuff is connected to the monitor.

Pulse too low for good
measurement.

NIBP time too long Inflation time exceeded (max.

135 sec.) due to interferences
because the patient has moved

NIBPs < [lower limit] Systolic pressure too low. Check the patient and alarm limits.

NIBPs > [upper limit] Systolic pressure too high. Check the patient and alarm limits.

NIBPd < [lower limit] Diastolic pressure too low. Check the patient and alarm limits.

NIBPd > [upper limit] Diastolic pressure too high. Check the patient and alarm limits.

NIBPm < [lower limit] Mean pressure too low. Check the patient and alarm limits.

NIBPm > [upper limit] Mean pressure too high. Check the patient and alarm limits.

1. If the initial pressure is too low, the measurement is immediately restarted and the pressure is increased by

60 mmHg.

Apply the cuff to another extremity where
the pulse measurement is easier.

Check the patient (see also message "cannot
measure").

Repeat the measurement.

Directions for use Monitoring and Measurements 67

Masimo
module
connector

Nellcor
module
connector

SpO2 monitoring

Two SpO2 modules are available with the monitor - Masimo or Nellcor. The two modules
are distinguished by the connectors. The display data and waveform are similar for both
modules. The Masimo module has extra clinical settings for signal processing (see

“Masimo settings” on page 70).

• Pulse oximetry enables the continuous non-invasive monitoring of the functional
oxygen saturation of the arterial hemoglobin and the peripheral pulse rate.

• The display shows the continuous progress of the numeric SpO
waveform and signal quality values.

• The displayed plethysmographic waveform is not proportional to the pulse volume.

• The update period of the measurement readings on the display is approximately 2
seconds.

• In accordance with the relevant standards, the temporary alarm silence period can be
set to a maximum of 2 minutes.

The peak wavelength and maximum optical power of the light emitted by the pulse
oximeter probes can be especially useful to clinicians e.g. performing photodynamic
therapy. They are as follows:

, plethysmographic

2

• Range of peak wavelengths: 600 nm to 900 nm.

• Maximum light power output: <15 mW.

68 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

Safety

WARNING Only use sensors recommended from Welch Allyn for SpO

measurement with the monitor. Only use Masimo sensors when the monitor has
a Masimo module. Only use Nellcor sensors when the monitor has a Nellcor
module. Other sensors can impact the performance and give incorrect
measurement readings.

WARNING The information in this manual does not overrule any instructions

given in the SpO
read the sensor directions for use.

WARNING Do not use the pulse oximeters or sensors during magnetic

resonance image scanning. Induced current could potentially cause burns, and
the pulse oximetry may affect the image and the accuracy of the measurements.

WARNING Do not use the pulse oximeter or sensors in or near the presence of

MRI equipment or in an MRI suite.

WARNING Tissue damage can be caused by incorrect application or use of a

sensor. Inspect the sensor site as described in the sensor directions for use to
ensure skin integrity and correct positioning of the sensor.

sensor directions for use. Before using the sensor, carefully

2

2

WARNING Do not use damaged patient cables, damaged sensors or a sensor

with exposed optical components.

WARNING Substances causing disturbances: Carboxyhemoglobin can lead to

falsely high measurement readings. Colors or substances containing colors that
influence the natural blood pigments can also lead to incorrect measurement
readings.

WARNING Exposure to excessive illumination, such as surgical lamps

(especially those with xenon light source), bilirubin lamps, fluorescent lights,
infrared heating lamps or direct sunlight, can affect the performance of an SpO
sensor. To prevent exposure to excessive illumination, ensure that the sensor is
correctly applied and that it is covered with an opaque material, if required. If
these measures are neglected, excessive illumination can lead to incorrect
measurements.

WARNING Change the sensor's position at least every 4 hours.

2

Directions for use Monitoring and Measurements 69

SpO2 settings

The parameter settings are selected with the trim knob, described previously (see

“Settings via a parameter field” on page 31).

The default settings are in bold.

Parameter Description

alarm pause When the alarm is paused the message SpO2 Alarms Paused

SpO

2

HR/PR source

HR/PR tone

1

1

SpO2 lower/upper limit Range: 50- 100

1. This can also be set in the Setup HR menu.

2. If SpO2 is the HR/PR source, the pitch of the beep corresponds to the SpO2 saturation. A high-pitched beep

indicates a high saturation.

appears in the message line. The alarm is paused until the sensor is
reinstalled.

ECG, SpO

displayed in brackets next to the HR parameter.
Off, on

, P1 (selection of the heart rate source). The source is

2

2

Lower limit default 50
Upper limit default 100

70 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

Note

SIQ values

PI value

Masimo settings

When the monitor has a Masimo module installed, the following settings are additionally
available:

The extra settings for masimo modules are only available when Masimo settings
enabled in the parameter settings (see “Defining parameter fields” on page 25).

Parameter Description

Display Signal IQ (SIQ)
Waveform

1

On, Off. This value shows the acquired signal quality and timing of
the pulse relative to the plethysmograph. A vertical line is displayed
corresponding with the pulse beep: a tall vertical line indicates a
high quality signal, a small line indicates a low quality signal.

Display Perfusion Index (PI)

Averaging Time 2, 4, 8, 10, 12, 14, 16. Averaging time in seconds. It is recommended

Sensitivity Normal, Max, APOD. The normal mode provides the best

Fast SAT Off, on. Fast SAT mode enables rapid tracking of arterial oxygen

2

On, Off. The perfusion index indicates the percentage of pulsatile to
non-pulsatile signal. The range of signal strength is 0.02 to 20%. A
value of 0 indicates that no measurement is available. This setting
allows clinicians to place sensors on optimal sites and can also be
used as a troubleshooting tool.

that the default of 8 seconds is suitable for most applications.

combination of sensitivity and probe off detection performance. This
mode is recommended for the majority of patients.
The max mode can be used where obtaining a reading is most
difficult and the signal may be very weak.
The adaptive probe off detection (APOD) mode is the least
sensitive in picking up a reading on patients with low perfusion but
has the best detection for off-probe conditions. This mode can be
used for patients that are at particular risk of the sensor becoming
detached (pediatric, combative, etc).

saturation changes by minimizing the averaging. This mode is
clinically applicable during procedures when detecting rapid
changes in oxygen saturation is paramount such as induction,
intubation and sleep studies.
Fast SAT is always on when averaging time (above) is set to 2 or 4.

1. It is necessary to reboot the device after changing this setting.

2. It is necessary to reboot the device after changing this setting.

Directions for use Monitoring and Measurements 71

SpO2 messages

Message Possible cause Suggested action

SpO

– check sensor Defective SpO2 sensor Replace the sensor.

2

Incorrect settings in the monitor Check the monitor settings.

SpO

– check sensor

2

placement

Poor sensor contact or the
sensor has fallen off

Check the contact between the sensor and
the patient.

Sensor is disturbed by ambient

Cover the sensor.

light

Sensor defective (red light on

Replace the sensor.

the sensor is not lit)

Low Perfusion

SpO

2

1

Sensor not properly applied Check the sensor and reapply.

Fingernail varnish on the finger Remove fingernail varnish.

Thick skin Change finger.

Sensor failed Change sensor.

Weak Signal see SpO

unplugged SpO2 not connected to the

SpO

2

monitor

Low Perfusion above see SpO2 Low Perfusion above.

2

Connect sensor.

SpO2 artifact Patient has moved Calm the patient.

Hemodynamic interference Apply sensor to another extremity.

Too thin skin Apply sensor to a larger finger.

< [lower limit] SpO2 too low Check the patient and alarm limits.

SpO

2

SpO

> [upper limit] SpO2 too high Check the patient and alarm limits.

2

2

SpO2 low signal IQ

Poor quality signal Check the sensor and reapply. Move sensor

to obtain a better quality signal.

PR < [lower limit] Pulse rate too low Check the patient and alarm limits.

PR > [upper limit] Pulse rate too high Check the patient and alarm limits.

1. When the monitor has a Masimo module, the message SpO2 low perfusion only occurs when the perfusion index

feature is enabled.

2. The SpO2 low signal IQ message is only given when the monitor has a Masimo module and only occurs if Signal IQ

waveform feature is enabled.

72 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

Note

Note

Note

IBP monitoring

Safety

WARNING Carefully read the manufacturer's instructions before using the

invasive blood pressure kit.

WARNING When applying the kit to the patient, make sure that absolutely no air

penetrates the system.

WARNING To achieve correct arterial pressure measurement, the pressure

sensor must be installed on the level of the right atrium.

WARNING If the pressure sensor's position is moved after calibration, this may

give inaccurate values.

WARNING If an invasive catheter for blood pressure measurement is introduced

into an arterial vessel, the circulation in the terminal vessels must be checked at
regular intervals.

WARNING Single-use accessories must not be reused.

WARNING For patient safety, ensure that neither the sensors nor the patient or

persons touching the patient, come into contact with conducting objects, even if
these are grounded.

WARNING Precautions must be observed when using high frequency devices.

To prevent the incorrect IBP measurements, only use sensors that are protected
against high-frequency radiation.

The kit and operating procedure vary according to manufacturer. Please consult
the manufacturer's documentation for connection.

For warm-up time/ready for measurement and displacement for invasive
transducers, refer to the documentation of the transducer manufacturer.

P1 is the only connection that can determine the HR/PR source.

Directions for use Monitoring and Measurements 73

Note

Preparing IBP measurement

Refer to the manufacturer’s directions for use for operating information for the IBP sensor.

IBP settings

The parameter settings are selected with the trim knob, described previously (see

“Settings via a parameter field” on page 31).

When changing the IBP label in the setup window, the upper and lower alarm
limits will change to match the label (see“IBP alarm defaults” on page 74). The
IBP default size (scale) will also change according to the label set.

Parameter Description

Zero Set Zero set the selected IBP1, IBP2, IBP3, IBP4

Label P1, P2, P3, P4

ART

PA

RA

LA

CVP

ICP

UA

UV

Size -10 to 20 mmHg

-10 to 60 mmHg

0 to 150 mmHg

0 to 200 mmHg

0 to 250 mmHg

0 to 300 mmHg

Format Sys/Dia or Mean. This defines the main measurement to be

displayed, that is the larger measurement displayed in the IBP box.
The secondary measurement is displayed smaller below the main
measurement. Note that the mean measurement is shown in
brackets.

74 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

IBP alarm defaults

Label / Parameter Adult

Lower Limit

P1, P2, P3, P4
P1, P2, P3, P4
P1, P2, P3, P4

ART SYS

DIA

ART
ART Mean

CVP SYS
CVP DIA
CVP Mean

PA SYS
PA

DIA
Mean

PA

SYS

ICP
ICP

DIA
Mean

ICP

SYS

RA
RA

DIA
Mean

RA

SYS

LA
LA

DIA
Mean

LA

SYS

UA
UA

DIA
Mean

UA

SYS

UV
UV

DIA
Mean

UV

SYS
DIA
Mean

6 14 2 10 2 10

-4 6 -4 2 -4 2
0 10 0 4 0 4
75 220 75 145 50 100
35 110 35 100 30 70
50 120 50 110 35 80
6 14 2 10 2 10

-4 6 -4 2 -4 2
0 10 0 4 0 4
10 34 10 34 10 34
016016016
020020020
614210210

-4 6 -4 2 -4 2
0100404
6 14 2 10 2 10

-4 6 -4 2 -4 2
0 10 0 4 0 4
6 14 2 10 2 10

-4 6 -4 2 -4 2
0 10 0 4 0 4

Adult
Upper Limit

Pediatric
Lower Limit

Pediatric
Upper Limit

Neonate
Lower Limit

50 100
30 70
35 80
2 10

-4 2
0 4

Neonate
Upper Limit

Directions for use Monitoring and Measurements 75

Note

IBP zero set

• Zero Set must be carried out before every application.

• To prevent incorrect measurement readings due to the sensor's physical null drift,
calibrate the sensor every 24 hours.

Ensure the sensor is kept still during zero set. If the pressure sensor's position is
moved during zero set, this can lead to incorrect values.

1. Move to the desired IBP measurement field (P1, P2) using the trim knob.

2. Press the trim knob to display the IBP menu.

3. Select Zero Set with the trim knob and press to carry out the zeroing.

4. A straight line is displayed in the IPB waveform.

IBP alarms and messages

Message Possible cause Suggested action

IBP needs service No IBP module detected Switch off/on.

Replace monitor.

IBP needs calibration Zero-point sensor too high/low

by more than ± 30 mmHg or
unsteady pressure

IBP artifact Loose sensor contact Inspect the sensor and cable connection.

A manipulation at the sensor,
such as rinsing, has caused
variation peaks of ± 150 mmHg

Incorrect IBP value
displayed

IBPs < [lower limit] Systolic pressure too low Check the patient and alarm limits.

IBPs > [upper limit] Systolic pressure too high Check the patient and alarm limits.

IBPm < [lower limit] Mean pressure too low Check the patient and alarm limits.

IBPm > [upper limit] Mean pressure too high Check the patient and alarm limits.

IBPd < [lower limit] Diastolic pressure too low Check the patient and alarm limits.

IBPd > [upper limit] Diastolic pressure too high Check the patient and alarm limits.

Constant pressure (± 30 mmHg)
during the calibration in the
system

Check tube system, sensor and valves.

Re-calibrate the sensor.

After rinsing, calibrate the sensor.

Check tube system, sensor and valves. Set
three-way valve to ambient pressure.

Re-calibrate the sensor.

76 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

Note

Temperature monitoring

• Depending on the sensor type, the sensor can be applied to the ear, the skin or the
rectum.

• To achieve a reliable measured value, independent of the measuring site, the
measurement duration must be at least 2 minutes.

Temperature settings

The parameter settings are selected with the trim knob, described previously (see

“Settings via a parameter field” on page 31).

The default settings are in bold.

Parameter Description
TEMP Display Mode T1 and T2, T1 only, or T1 and
Temp Units °C or °F

T1 and T2 lower / upper limit Range: 15°C to 45°C (59°F and 113°F)

T lower / upper limit Range: 15°C to 45°C (59°F and 113°F)

Alarms can only be set for the temperature parameters that are currently on
display. So for example, if T1 and delta T were selected for display, there would be
no T2 alarm settings.

Temperature alarm and messages

Message Possible cause Suggested action

TEMP unplugged TEMP not connected to the

monitor

TEMP needs service The monitor has detected an

error

TEMP out of range The temperature is outside the

measuring range of the monitor.

T

Lower limit default: 35°C (95°F)
Upper limit default: 37.8°C (100°F)

Lower limit default: 0.0°C (0.0°F)
Upper limit default: 0.1°C (0.2°F)

Connect sensor.

Switch monitor Off/On or replace monitor.

Check the patient or alarm limits.

Sensor or monitor problem Check the sensor and monitor. Switch the

monitor off/on.

TEMP < [lower limit] Temperature too low Check the patient and alarm limits.

TEMP > [upper limit] Temperature too high Check the patient and alarm limits.

Directions for use Monitoring and Measurements 77

Cardiac output (option)

Introduction

The WA 1500 patient monitor uses the thermodilution method of measuring cardiac
output. A pulmonary artery catheter (PAC) is inserted into the right side of the heart. The
PAC is balloon tipped and is inflated to help it through the right ventricle to occlude a
smaller branch of the pulmonary artery system. The balloon is deflated and the PAC
injects a small amount (10ml) of cold injectate at a known temperature into the pulmonary
artery. The temperature is then measured at a known distance using the same catheter.

The cardiac output can be calculated from the measured temperature curve. Low cardiac
output will change the temperature slowly, and high cardiac output will change the
temperature rapidly. The degree of change in temperature is directly proportional to the
cardiac output.

Usually three to five repeated measures are averaged to improve accuracy.

CO Units

Cardiac output is expressed as liters / minute:

• Cardiac Output (CO) = Stroke volume × Heart rate

where: Stroke volume = End Diastolic Volume (EDV) - End Systolic Volume (ESV)

Heart rate = beats per minute

The cardiac index is expressed as liters / minute / m

• Cardiac Index (CI) = Cardiac output/ BSA

where: BSA is Body Surface Area in square meters.

2

:

78 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

Note

Note

Safety

WARNING Carefully read the manufacturer's catheter instructions before

carrying out measurements.

WARNING When an invasive catheter is introduced into an arterial vessel, the

circulation in the terminal vessels must be checked at regular intervals.

WARNING When applying the kit to the patient, make sure that no air

penetrates the system.

WARNING PAC use is complicated by arrhythmias, infection, pulmonary artery

rupture, and right heart valve damage.

WARNING Single-use accessories must not be reused.

WARNING It is important that the CO Computation Constant (see “Cardiac

output settings” on page 80) of the catheter is entered correctly to ensure

accurate measurements for the specific Edwards-compatible catheter used.

Caution Only use Edwards-compatible catheters

Caution Only use Baxter/Edwards/Abbott "in-line" injectate sensors

Caution It is important that the injectate temperature is in the range specified

for the computation constant.

Caution It is important that the injectate volume is the same as that specified in

the computation constant.

The kit and operating procedure vary according to manufacturer. Please consult
the manufacturer's documentation for connection.

For warm-up time/ready for measurement and displacement for invasive
transducers, refer to the documentation of the transducer manufacturer.

Directions for use Monitoring and Measurements 79

Note

Note

Approved catheters and injectate sensor type

Catheters

The monitor will work with any blood temperature sensor that is Edwards-compatible.

Injectate Sensor

The injectate sensor must be a Baxter/Edwards/Abbott "in-line" thermistor.

The monitor does not support bath probe or arrow flow-through sensor.

Preparing for cardiac output measurement

The CO is only displayed when the CO option is enabled. If the CO measurement
field is not displayed, ensure that it is enabled in the parameter settings.

1. Press the Setup button , enter the menu Setup/Parameters and activate CO

enabled (yes).

2. Connect the catheter to the CO connector on the side panel.

3. Setup the catheter according to the instructions given by the manufacturer.

80 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

Note

Taking a CO measurement

Cardiac output settings

1. Use the trim knob to select and highlight the CO measurement field. Press the trim
knob to display the settings.

Parameter selection with the trim knob is described previously (see “Settings via

a parameter field” on page 31).

2. The settings screen appears:

3. Make the settings as shown on the following page.

Directions for use Monitoring and Measurements 81

CC =

1. 0 8 * C

t

* 60 * V

I

1000

The default settings are in bold.

Parameter Description
Mode Auto, manual. In auto mode the unit monitors the blood temperature and

indicates that a measurement can be commenced only when the temperature
is stable.
In manual mode, the user monitors starts the measurement at any time.

Computation constant Between 000 and 999 (starting figure 400). This is a constant based on the

temperature coefficient of the catheter, temperature and volume of the
injectate, and catheter dimensions.

The formula used is as follows:

Where:

1.08 = density times specific heat (5% dextrose / blood)
C

= catheter thermal loss coefficient (specified by the catheter

t

manufacturer)
60 = seconds
V

= volume of the injectate

I

1000 = conversion factor (cubic centimeters to liter)

Note: The C
temperature of the injectate solution and separate C
different temperature ranges, for example 0

value specified by the manufacturer, will differ according the

t

o

values will be stated for

t

to 5o, 19o to 22o , and 23o to 25o.

Since all factors are constants except the injection volume and the injection
temperature, many manufactures will specify the computation constant CC for
specific volumes and temperature range instead of the thermal loss coefficient
C

in their instruction leaflet. This can be entered directly.

t

Display parameter CO, CI. Measurement shown as cardiac output (liters per minute) or cardiac

index (cardiac output / body surface area (m2)). For CI the patient data must
have been entered.

Caution It is essential that the computation constant is entered correctly so

that the monitor knows the volume and temperature range of the injectate, and
the thermal loss of the catheter. Inaccurate results will be obtained if the
computation constant is not correct.

82 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

Note

Real-time blood
temperature

Injectate temperature

See Note below

Taking a CO measurement

1. Insert the catheter and prepare injectate solution in accordance with the instructions
provided by the manufacturer.

2. On the monitor make the settings and enter the computation constant (see previous
page).

3. The blood temperature is monitored and when the temperature is stable, Ready is

indicated at the top of the screen.

In manual mode, (see the mode parameter in“Cardiac output settings” on

page 80), a start button is positioned in the lower right of the screen. The Ready

indication is given when this is selected.

Directions for use Monitoring and Measurements 83

Note

Temperature waveform

CO Measurements 1 to 5

Averaged value of all
measurements

View all temperature
curves

4. Inject the solution. The temperature waveform is displayed and the CO value given in
measurement 1.

Follow you facility’s guidelines for injecting the solution.

5. Repeat to obtain 3- 5 measurements.

Editing the measurements

• The average value is displayed in the bottom middle of the screen and is updated after
every measurement or if a measurement is deleted.

• After five measurements, when another measurement is taken, the latest
measurement takes the place of measurement 5 and all measurements are shifted
left (and measurement 1 is deleted).

• Any measurement can be deleted by selecting and pressing the trim knob. If another
measurement is taken, the later measurements are shifted left as above and the
measurement deleted is replaced by the one higher.

•Select Review curves to view the temperature waveforms of all measurements.

84 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

Note

Saving a measurement

When three or more consistent measurements have been obtained, Save Average can

be selected to save the measurement. You are prompted to confirm.

When confirmed the averaged measurement is entered in the CO field at the bottom of
the screen.

The time when the measurement was made appears in the top right corner and the
measurement parameter (CO or CI) appears in the left corner.

The measurement remains until overwritten or a new patient is confirmed.

A graphical trend view of the CO can be displayed. This is selected in waveforms
(see “Displaying trend data in the measurements screen” on page 30).

Directions for use Monitoring and Measurements 85

CO messages

The following self-clearing alert messages may be displayed during the CO measurement
process:

Message Message trigger and when displayed Suggested action

BT out of range (too
high or
BT out of range (too
low)

IT out of range (too
high) or
IT out of range (too
low)

CO measurement
Time-out

Blood temperature out of range (High or Low),
displayed when:

• detected during a CO measurement session.

• CO start has been selected for manual
mode.

Injectate temperature out of range (high or low),
displayed when:

• detected during a CO measurement session.

• detected after CO start has been selected
for manual mode.

No blood temperature change, displayed when:

• CO start has been selected for manual mode
and no reading is detected in the time-out
period.

Verify correct catheter position.

Verify that injectate volume and temperature
corresponds for the catheter used and that the
computation constant has been entered
correctly.

Check injectate temperature.

Check injectate probe and catheter
probe connection.

Ensure the injectate is injected soon after CO
start has been selected. Reselect Start.

Verify correct catheter position.

BT unplugged Blood temperature transducer unplugged,

IT unplugged Injectate temperature transducer unplugged,

BT check sensor Blood temperature transducer fault, displayed

IT check sensor Injectate temperature transducer fault,

CO computation
constant not yet
entered

displayed when:

• detected during a CO measurement session.

• detected after CO start has been selected
for manual mode.

displayed when:

• detected during a CO measurement session.

• detected after CO start has been selected
for manual mode.

when:

• detected during a CO measurement session.

• detected after CO start has been selected
for manual mode.

displayed when:

• detected during a CO measurement session.

• detected after CO start has been selected
for manual mode.

Computation constant not yet entered, displayed
when:

• detected during a CO measurement session.

Check connections and catheter.

Check connections.

Check connections.

Check catheter.

Check connections.

Check injectate sensor.

Enter the computation constant.

• detected after CO start has been selected
for manual mode.

86 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

Entered
Val ues

Calculated
Values

Hemodynamic calculations

1. Press the Setup button .

2. Select Hemodynamic Calculations.

Enter the following parameters to calculate the hemodynamic calculations (see next
page). As soon as the calculated values have sufficient data to for the entered
parameters, the calculated values are shown.

Parameter Description

CO Cardiac Output

HR Heart rate (bpm)

ARTs Arterial pressure systolic

ARTd Arterial pressure Diastolic

ARTm Mean arterial pressure

PAs Pulmonary artery pressure systolic

PAd Pulmonary artery pressure diastolic

PAm Mean pulmonary artery pressure

CVP Central venous pressure

PAWP Pulmonary artery wedge pressure - the pressure measured by

Height Height in cm or inches

Weight Weight in Kg or lbs

wedging the pulmonary catheter with the inflated balloon in the
small pulmonary arterial branch.

Directions for use Monitoring and Measurements 87

Calculations

Parameter Units Description

Time Time when the calculations were made

BSA m

2

SV ml Stroke volume (milliliters / stroke):

SVR dyne-sec/cm

PVR dyne-sec/cm

LCW kg-m Left cardiac work:

Body surface area in m2 calculated as follows:

• BSA = ([Height(cm) x Weight(kg)] / 3600 )

½

• SV = (C0*1000) / HR

5

Systemic Vascular Resistance (SVR). Represents the load applied to the left
ventricular muscle during ejection.

• SRV = (ARTm - CVPm) * 80 / CO

5

Pulmonary vascular resistance (PVR):

• PRV = (PAm - PAWP) * 80 / CO

• LCW = CO * (ARTm - PAWP) * 0.0136

LVSW gm-m Left ventricular stroke work:

• LVSW = SV * (ARTm - PAWP) * 0.0136

RCW kg-m Right Cardiac Work:

• LVSW = SV * (ARTm - PAWP) * 0.0136

RVSW gm-m Right Ventricular Stroke Work:

• RVSW = SV * (PAm - CVPm) * 0.0136

CI l/min/m

2

Cardiac Index:

• CI = CO / BSA

SVI ml/m

2

Stroke Volume Index:

• SVI = SV / BSA

88 Monitoring and Measurements Welch Allyn 1500 Patient Monitor

Parameter Units Description

5/m2

SVRI dyne-sec/cm

PVRI dyne-sec/cm

LCWI kg-m/m

LVSWI gm-m/m

RCWI kg-m/m

RVSWI gm-m/m

2

2

2

2

Systemic Vascular Resistance Index:

• SVRI = SRV * BSA

5/m2

Pulmonary Vascular Resistance Index:

• PVRI = PVR * BSA

Left Cardiac Work Index:

• LCWI = LCW / BSA

Left Ventricular Stroke Work Index:

• LVSWI = LVSW / BSA

Right Cardiac Work Index:

• RCWI = RCW / BSA

Right Ventricular Stroke Work Index:

• RCSWI = RVSW / BSA

89

6

Maintenance

Maintenance interval

This software controlled monitor has undergone a software risk analysis to minimize any
hazards associated with software defects.

The regular system maintenance must include a functional test according to the
manufacturer's instructions. The test results should be recorded (see “Inspection and

checklist report” on page 94).

Maintenance work not described in this section, e.g. battery replacement, may only be
accomplished by a qualified technician.

The following table indicates the intervals and responsibilities of the maintenance work
required. Local regulations in your country may stipulate additional or different inspection
intervals and tests.

Interval Maintenance Responsible

Before use Visual inspection of the monitor

Every 6 months Visual inspection of the monitor

User

and cables

User

and cables

Button check

Speaker check

LED check

Alarm check

Every 12 months Yearly test and test after repair

1. The need for calibration is based upon physical component changes that occur during use. The module requires
its first calibration after 1200 operating hours or one calendar year, whichever comes sooner, and then after each
4000 operating hours or once a year, whichever comes sooner. The message Calibration Due appears when the
hourly limit is reached. It is advisable to calibrate in the one-year maintenance program especially if the monitor is
used for intermittent, short term use typical of patient monitors.

according to IEC/EN 62353.

Calibration

CO

2

1

Qualified technician

90 Maintenance Welch Allyn 1500 Patient Monitor

Visual inspection

Defective monitors or damaged cables must be removed from service until repaired or
replaced.

Visually inspect the monitor and cables for the following:

• Monitor casing damaged or cracked, excessively scratched, etc.

• Damage to the LCD screen.

• Damage to sensor sheathing, mains, or potential equalization cables.

• Damage to connection panels or connectors.

• Legibility of the labels on the rear of the monitor.

• Legibility of the annotation on the function button panel.

Button check

Press all buttons and trim knob and check that they work properly.

Speaker check

On switch-on, beeps must be audible.

LED check

Connect mains to the monitor and ensure the Mains LED is illuminated.

Disconnect the mains supply and leave the monitor on for 10 minutes. Reconnect the
mains supply and ensure both the mains LED and the battery charge LED are illuminated.

Alarm check

The alarm check is performed with the SpO2 sensor. Proceed as follows:

1. Connect the SpO
normal range.

sensor to a volunteer and check that the measurement is within

2

2. Set the SpO
on page 69), so that the alarm activates.

3. Check that the visual and audible alarms are activated.

alarm to on and set the limit to the lowest setting (see “SpO2 settings”

2

Directions for use Maintenance 91

Battery maintenance

The battery is maintenance free during its normal life.

• No maintenance is necessary during normal operation.

• If the monitor is not used, check and recharge the batteries every three months. The
battery should not be allowed to fully discharge during storage.

• Replace the battery every 2 to 5 years (depending upon application). When the
running time falls substantially under two hours (lithium ion battery), or one hour (lead
acid battery), replace the battery.

Recharging the battery

Totally discharged batteries require the following times to charge:

• Lead acid battery: 80% capacity - 2.8 hours, 100% capacity 3.5 hours

• Li-Ion battery: 80% capacity - 2.5 hours, 100% capacity - 6.5 hours

It is possible to use the monitor when the battery is being charged; however, the charging
time of the battery will be extended.

1. Connect the monitor to the mains but do not switch it on.

2. The LEDs for both mains and battery are illuminated.

3. The battery LED is extinguished when the battery is fully charged.

Battery disposal

Batteries must be disposed of in municipally approved areas or sent back to Welch Allyn.
See “Recycling monitor components” on page 99.

WARNING Explosion warning. The battery must not be burned or disposed of in

domestic trash.

WARNING Flammability and chemical danger. Do not open the battery.

WARNING Protect the contacts from shorting when disposing of the battery.

Apply non-conducting tape to the contacts.

92 Maintenance Welch Allyn 1500 Patient Monitor

Inspecting and cleaning the monitor and accessories

WARNING Do not autoclave the monitor or any accessories.

WARNING Do not immerse the monitor in liquid when cleaning. Do not

immerse accessories in liquid when cleaning unless the accessory
manufacturer’s cleaning instructions explicitly instruct you to do so.

WARNING Fire and electrical shock hazard. Always unplug the monitor from the

electrical power outlet before inspecting or cleaning the monitor and accessories.
Exposing any of these to liquids, such as cleaning solutions, while they are
connected to electrical power could result in electrical shock or fire.

Before cleaning the monitor or any accessories, thoroughly inspect them.

• Look for any signs of damage and any improper mechanical function of buttons or

connectors.

• Gently bend and flex cables, inspecting them for damage or extreme wear,

exposed wires, or bent connectors.

• Confirm that all connectors engage securely.

• Ensure that all transducers and accessories are within their expiration date.

• Immediately report any sign of damage or malfunction to your service

department, and remove the monitor from service.

To clean the monitor or any accessories, follow these steps:

1. Wipe the equipment with a cloth slightly moistened (not wet) with one of the
approved cleaning solutions listed in “Cleaning instructions and cleaning solutions”
on page 93.

2. Clean cable assemblies by gently wiping from the center of the cable. Do not allow
the sheathing to be displaced.

3. Thoroughly wipe off any excess cleaning solution. Do not let the cleaning solution run
into or accumulate in connector openings, latches, or crevices. If liquid gets into
connectors, dry the area with warm air, and then check the equipment to confirm that
it operates properly.

Caution Use only a cleaning solution recommended by Welch Allyn for this

equipment. Use of any other cleaning solutions can cause damage to the
equipment, including cracking and deterioration of the plastic case.

Caution Always follow the mixing/diluting instructions provided by the

manufacturer of the cleaning solution.

Caution Never use any of the following solutions or similar products to clean

the equipment: ethyl alcohol, ethanol, acetone, hexane, abrasive or scouring
powder or material.

Directions for use Maintenance 93

Cleaning instructions and cleaning solutions

Equipment Cleaning instructions Approved cleaning solutions

1

Monitor

ECG cable, extension
cable

SpO

cable, extension

2

cable

Other accessories Consult manufacturer’s instructions. Consult manufacturer’s

1. The equipment can be disinfected to comply with OSHA requirements for cleaning and decontaminating spills of blood

and other body fluids. (Federal OSHA blood borne pathogens standard: 29 CFR 1910.1030, 12/6/91.)

2. If liquid gets into the connectors, dry the area with warm air and then verify all monitoring functions.

Wipe with a nearly dry cloth moistened with
cleaning solution.
Thoroughly wipe off any excess cleaning
solution. Do not let cleaning solution run into
connector openings or crevices.

2

70 % solution isopropyl alcohol;
neutral mild detergent solution;
all products designed for cleaning
plastic.

Consult manufacturer’s instructions. Mild detergent solution; also

consult manufacturer’s
instructions.

Consult manufacturer’s instructions. Consult manufacturer’s

instructions.

instructions.

94 Maintenance Welch Allyn 1500 Patient Monitor

Inspection and checklist report

In accordance with the maintenance interval detailed previously, the following check list
should be copied and followed.

Monitor Serial Number: _________________________________

Every six months

Inspection Result Checked

General examination

Visual inspection of the
monitor.

Visual inspection of the
LCD.

Visual inspection of all
cable assemblies and
sensors and accessories.

Monitor casing not broken or
cracked.

LCD screen undamaged.

Electrode cable sheathing and
connectors undamaged. 





No kinks, abrasion or wear in any
cable assembly.

All transducers and accessories
are within their expiratory date.

Plug and socket
connectors.

Button check Buttons work. 

Speaker check.
Switch the monitor on by
pressing the On button.

LED check Mains LED on when mains

Alarm Check

Connect SpO
volunteer.

Set SpO2 limit to lowest
setting.

Recurrent test

Confirm the date of last
factory inspections and
test.

sensor to

2

Input/output connectors
undamaged.

Switch-on beeps sounded. The
standard screen is displayed. 

connected. Battery LED on when
battery charging.

Measurement within range.

Measurement out of range and
visual and audible alarm
activated.

If the monitor is due for a yearly
test, have a qualified technician
perform the test.















Date of Inspection:

Inspector:

Directions for use Maintenance 95

Every 2 to 5 years

Inspection Result Checked

Internal battery

Replace battery if
operation falls
substantially under two
hours (Lithium ion battery),
or one hour (lead acid
battery).

Date of Inspection:

Inspector:

Replace battery 

96 Maintenance Welch Allyn 1500 Patient Monitor

Replacing the fuses

WARNING Disconnect the monitor from the mains before changing the fuses.

WARNING Blown fuses must only be replaced with the fuse types indicated in

the below table.

Fuse types

Voltage range Number Fuse type WA Part No. Manufacturer Part No.

100-240 VAC 2 M 1.6A E 250V 4.210004 Schurter Inc, FSM 0034.2518

M= Medium time lag
E= Enhanced breaking capacity

Changing the fuse

1. Disconnect the monitor from the mains.

2. Release the fuse holder by gently squeezing the side retaining clips and remove the
fuse holder.

3. Replace both fuses. Re-insert the fuse holder until the two side clips snap in place.