Respironics 920, 920M Instruction And Service Manual

English

Instruction and Service Manual

Models 920 and 920M

Hand Held Pulse Oximeters

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English

About the Manual

Boxes draw attention to contraindications, warnings, and
cautions.

The boxed messages are important. Be sure to read them.

The information in this manual has been carefully checked and is
believed to be accurate. In the interest of continued product
development, RESPIRONICS, INC. reserves the right to make
changes and improvements in this manual and the products it
describes at any time, without notice or obligation.

Caution: Federal Law (USA) restricts this device to sale by or
on the order of a physician.

Respironics Georgia

175 Chastain Meadows Court
Kennesaw, Georgia 30144-3724
USA
Customer Service Telephone: [phone] (USA and Canada)
Customer Service Fax: [phone] (USA and Canada)
www.respironics.com

Respironics Deutschland

Gewerbestrasse 17
82211 Herrsching
Germany
Telephone: [phone]
Fax: [phone]

Respironics Asia Pacific

3/F, Microtron Building
38 Hung To Road
Kwun Tong, Kowloon, Hong Kong
Telephone: [phone]
Fax: [phone]

References to “920” in this manual shall imply Models 920 and 920M.
References to “Respironics” in this manual shall imply Respironics, Inc.

is a registered trademark of Respironics, Inc.

Copyright © 1999 Respironics, Inc. All rights reserved.

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Table of Contents

I. Contraindications, Warnings, and Cautions......... 1

II. Unpacking Your Pulse Oximeter............................ 3

III. Introduction.............................................................. 4

A. Indications for Use.......................................................4

B. General........................................................................4

IV. Operating Instructions ............................................ 5

A. Batteries ......................................................................5

B. General........................................................................7

1. Connecting the Sensors.......................................7

2. Turning on the Pulse Oximeter.............................7

3. Verifying Operation...............................................9

4. Cleaning the Pulse Oximeter................................9

V. Features.................................................................. 10

A. Controls.....................................................................10

1. Power .................................................................10

2. Display Brightness..............................................10

3. Setup Mode........................................................11

a. Printer Settings.............................................11

b. Calendar Settings.........................................13

c. Clock Settings...............................................14

B. Displays.....................................................................15

1. SpO2 Display.......................................................15

2. ♥ (Pulse Rate) Display.......................................15

3.

(Perfusion) Indicator..................................15

4. Flashing Display.................................................16

5. Dash in the SpO2 Display ...................................16

C. Printer/Serial Output..................................................17

D. Memory Option (920M only) ......................................18

1. Recording Sessions ........................................... 18

2. Memory Output Mode......................................... 19

VI. Pulse Oximeter Sensors........................................ 21

A. General Sensor Description ...................................... 21

B. Finger Clip Sensors...................................................24

1. Adult Articulated Finger Clip Sensor ..................24

2. Pediatric Finger Clip Sensor...............................24

C. Flex Sensors.............................................................. 25

1. Adult Flex Sensor...............................................25

2. Infant Flex Sensor ..............................................26

3. Neonatal Flex Sensor.........................................26

D. Ear Clip and Reflectance Sensors.............................27

1. Ear Clip Sensor..................................................27

2. Reflectance Sensor............................................28

E. Adult and Pediatric Disposable Sensors ...................28

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F. Infant and Neonatal Disposable Sensors..................30

1. Infant Flexi-Form Sensor.................................... 30

2. Neonatal Flexi-Form Sensor ..............................31

G. Cleaning the Sensors................................................33

H. Sensor Compatibility ................................................. 33

VII. Theory of Operation ...............................................34

VIII. Specifications .........................................................36

IX. Service .....................................................................38

X. Warranty..................................................................39

XI. Accessories.............................................................40

XII. Troubleshooting Guide..........................................42

Tables

Table I: Printer, clock, and calendar mode

parameters.....................................................................11

Table II: 920P Printer modes........................................12

Table III: Printer/Sensor interface

assignments. .................................................................17

Table IV: 920M memory data format............................20

Table V: Reusable sensor reference. ..........................22

Table VI: Disposable sensor reference.......................23

Table VII: Sensor accessory reference. ......................23

Figures

Figure I: Replacing batteries in the 920..................... 6

Figure II: Connecting sensors to the 920................... 7

Figure III: Front view of the 920.................................. 8

Figure IV: Rear view of the 920...................................8

Figure V: Flowchart for setting the printer mode. .. 12

Figure VI: Flowchart for setting the calendar.......... 13

Figure VII: Flowchart for setting the clock. ............. 14

Figure VIII: Adult Articulated Finger Clip Sensor.... 24

Figure IX: Pediatric Finger Clip Sensor. .................. 24

Figure X: Adult Flex Sensor...................................... 25

Figure XI: Flex Sensor with tape strain relief.......... 25

Figure XII: Infant Flex Sensor on big toe................. 26

Figure XIII: Neonatal Flex Sensor on foot................ 27

Figure XIV: Ear Clip Sensor....................................... 27

Figure XV: Finger Flexi-Form Sensor....................... 29

Figure XVI: Infant Flexi-Form Sensor....................... 31

Figure XVII: Neonatal Flexi-Form Sensor. ............... 32

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Glossary of Symbols

Symbol Definition of Symbol

ATTENTION
Consult ACCOMPANYING DOCUMENTS

Type BF Applied Part:
(Patient isolation from electrical shock).

Canadian Standards Association

UL

Underwriters Laboratories

CE Marking indicating conformance to EC
directive No. 93/42/EEC concerning medical
devices.

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I. Contraindications, Warnings, and
Cautions

CONTRAINDICATIONS

• Do not operate in an explosive atmosphere.

• Do not operate the RESPIRONICS 920 in an MRI

environment.

• Do not use the 920 in a situation where alarms are

required. The 920 and 920M models have no audible
alarms.

WARNING

• The 920 is intended only as an adjunct in patient

assessment. It must be used in conjunction with clinical
signs and symptoms.

• Use only Respironics-manufactured sensors. These sensors

are manufactured to meet the calibration requirements for
Respironics pulse oximeters. Use of other manufacturer's
sensors may cause improper pulse oximeter performance.

• Check application site frequently to determine circulation,

positioning, and skin sensitivity of the patient. Each patient's
sensitivity to Respironics sensors may vary depending on
their medical status or the condition of their skin.

• Use of Respironics double-backed adhesive strips or the

Hydrogel tape strips should be discontinued if the patient
exhibits allergic reactions to the adhesive material.

• Do not stretch the adhesive tape while applying the sensors.

This may cause inaccurate readings or skin blisters.

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CAUTION

• Federal law (USA) restricts this device to sale by or on the

order of a physician.

• Read this manual carefully before use of the 920.

• Carefully read the instructional insert provided with the

sensor before use.

• The 920 is intended for spot-checking or continuous

monitoring by an attending health care professional.
Because the 920 has no audible alarms, international
labeling requirements dictate it be labeled “Not for
continuous monitoring.”

• The 920 must be able to measure the pulse properly to

obtain accurate SpO2 measurement. Verify that nothing is
hindering the pulse measurement before relying on the SpO2
measurement.

• Fingernail polish may reduce light transmission and thereby

affect SpO2 accuracy.

• The 920 may not work on all patients. If you are unable to

achieve stable readings, discontinue use.

• The 920 is sensitive and must be repaired by knowledgeable

and specially trained personnel only.

• The 920 may interpret motion artifact of sufficient amplitude

and regularity as good perfusion (green).

• The 920 is calibrated to determine the percentage of arterial

oxygen saturation of functional hemoglobin. Significant levels
of dysfunctional hemoglobin such as carboxyhemoglobin or
methemoglobin may affect the accuracy of the
measurement.

• Cardiogreen and other intravascular dyes, depending on the

concentration, may affect the accuracy of the SpO2
measurement.

• Do not use different types of batteries at the same time. Do

not mix fully charged and partially charged cells at the same
time. These actions may cause the batteries to leak.

• Do not immerse the 920 or Respironics sensors in liquid to

clean.

• Do not use caustic or abrasive cleaning agents.

• Ear Clip and Reflectance sensors are not recommended for

pediatric or neonatal use. The accuracy of the sensors has
not been established for pediatric or neonatal use.

• Do not remove any covers other than the battery cover when

battery replacement is necessary. There are no user
serviceable parts inside other than the replaceable batteries.

• Alkaline batteries may leak or explode if used or disposed of

improperly.

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II. Unpacking Your Pulse Oximeter

Contact the carrier immediately if the shipping carton for the 920 is
damaged. Carefully unpack the instrument and its accessories.
Confirm that the items listed below are packed with the 920 Hand
Held Pulse Oximeter. The 920/920M shipment includes:

• Model 920 or 920M Hand Held Pulse Oximeter

• Instruction and Service Manual for Models 920 and 920M

• Six AA batteries

• Model 936 Sensor (Adult Articulated Finger Clip)

If any item on this list is missing or damaged, do not use the pulse
oximeter. Contact your local distributor or, if you do not know your
local distributor, contact Respironics.

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III. Introduction

A. Indications for Use

The 920 Hand Held Pulse Oximeter is intended to be used for
monitoring oxygen saturation and pulse rate for adult, pediatric, and
neonatal patients in hospital, ambulatory, home, and EMS
environments. The 920 may be used for spot checking and/or
continuous monitoring when attended by a healthcare professional. The
variety of individual sensors available must be checked frequently to
ensure proper circulation and application.

B. General

The 920 Hand Held Pulse Oximeter is small and lightweight. The
920 has visual alarms for tracking patient status. It typically will
operate for 100 hours continuously between battery replacements.
The 920 requires no routine calibration or maintenance.

The 920 determines arterial oxyhemoglobin saturation (%SpO2) by
measuring the absorption of red and infrared light passed through
tissue. Changes in absorption caused by pulsation of blood in the
vascular bed are used to determine arterial saturation and pulse
rate.

Oxygen saturation and pulse rate are displayed on light emitting
diode (LED) digital displays. On each detected pulse, the perfusion
LED flashes. Patient perfusion signals are graded as good,
marginal or inadequate and are indicated as such by the LED
flashing green, yellow, or red. This simple method gives the user a
pulse-by-pulse visual indication of waveform signal quality without
requiring the user to perform complex waveform analysis during
critical patient care situations.

Sensor disconnect or malfunction is indicated by lack of good
perfusion flashes and/or a dash to the left of the SpO2 value on the
LED display. Ultimately, if adequate perfusion pulses are not
received, the SpO2 and Pulse Rate (♥) numerical values will be
replaced by dashes. When the batteries are low, the digital displays
will blink.

The 920 Pulse Oximeter may be used with all Respironics pulse
oximeter sensors (except fiber optic sensors) enabling proper
operation for nearly every patient.

NOTE:

Respironics sensors do not contain natural rubber
latex.

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IV. Operating Instructions

A. Batteries

CAUTION

• Do not remove any covers other than

the battery cover when battery
replacement is necessary. There are no
user serviceable parts inside other than
the replaceable batteries.

• Alkaline batteries may leak or explode if

used or disposed of improperly.

• Do not use different types of batteries at

the same time. In addition, do not mix
fully charged and partially charged cells
at the same time. These actions may
cause the batteries to leak.

The 920 Pulse Oximeter is powered by 6 AA Alkaline cells that will
typically provide 100 hours of continuous operation. The 920

indicates when the batteries are low by flashing the digital
displays once each second. When the displays begin flashing, the

batteries should be replaced as soon as possible. Replace the
batteries by removing the battery door on the bottom of the 920. Be
sure to follow the polarity markings on the rear label of the pulse
oximeter when installing new batteries. Refer to Figure I for an
illustration of battery replacement.

Rechargeable Nickel Cadmium batteries may be used in the 920 if
desired. Since NiCad batteries have less than half the capacity of
alkaline batteries, the batteries will have to be recharged more often
than every 100 hours.

NOTE:

Reducing the LED display brightness can extend
battery life up to 100%! Refer to Section V (A. 2.).

NOTE:

Replacing batteries erases the clock settings of the

920. The memory of the 920M will also be erased
when the batteries are replaced. These settings
should be reset after the batteries are replaced. To
do this, refer to Section V (A. 3.).

NOTE:

Batteries should be removed if the 920 is going to
be stored for more than 30 days. Batteries may
leak if left in the device for a long period of time.

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Figure I: Replacing batteries in the 920.

IMPORTANT:

Insert these two
batteries first.

Battery
Door

Battery
Orientation

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B. General

The 920 Hand Held Pulse Oximeter is portable and is intended for
attended patient monitoring by trained personnel. It displays
numerical values for oxygen saturation and pulse rate. Because the
920 Pulse Oximeter has no patient alarms, the user must frequently
observe the SpO2 and Pulse Rate displays.

1. Connecting the Sensors

Connect the sensor to its 9-pin mating jack on the top of the 920 as
shown in Figure II. To select a sensor type, refer to Section VI (A). If
additional cable length is necessary, connect the Model 927 Patient
Cable between the sensor and the 920 Pulse Oximeter. Position the
appropriate sensor on the patient. Refer to Section VI for sensor
positioning information.

Figure II: Connecting sensors to the 920.

2. Turning on the Pulse Oximeter

Turn on the 920 Hand Held Pulse Oximeter by depressing the “”
button on the front of the pulse oximeter. Refer to Figure III.

When the 920 is powered on, the SpO2 and ♥ displays will cycle
through the following sequence before displaying valid data values:

• “888 888”

• time saved in memory in hours and minutes

• software revision number

• “- -”

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Figure III: Front view of the 920.

Figure IV: Rear view of the 920.

Digital Display
Percent Oxygen
Saturation

Digital Display
Heart Rate

Perfusion Light

On Switch

Display Brightness
And Setup Mode

Off Switch

Serial Number

Battery
Orientation

Battery Door