Fukuda Denshi Co LX7230G User Manual

ECG, Respiration and SpO2

Transmitter

LX-7230N

Ver.02

Before using the product, please read this manual thoroughly.
Store this manual where it can be always referred to.

Operation Manual

LX-7230N

TYPE:GHz

This operation manual is for the LX-7230 Ver. 02.

CA UT IO N

Federal Law restricts this device to sale by or on the order of a physician.

CA UT IO N

Users are advised to periodically contact the FCC or specified frequency
coordinator and determine if other or your transmitter frequencies that
may cause interference.

CA UT IO N

The manufacturers, installers and users of Wireless Medical Telemetry
System equipment are cautioned that the operation of this equipment
could result in harmful interference to other nearby medical devices.

CAUTION:

This equipment for sale by or on the order of a physician.
The company and product names used in this manual are trademarks or

registered trademarks.

If this manual has pages missing or out of order, contact Fukuda Denshi

for replacement.

Only physician or persons instructed by physicians are allowed to use the

equipment.

The information contained in this document is subject to change without

notice due to improvement in the equipment.

Copyright © 2012 by Fukuda Denshi Co., Ltd.
No part of this document may be copied or transmitted in any form without the prior
written permission of Fukuda Denshi Co., Ltd.

Printed in Japan

Thank you for purchasing this product.
Before using this product, read this operation manual thoroughly for
correct handling and operation.

Safety Precautions

Read the “Safety Precautions” thoroughly before use to ensure correct and

safe use of the product.

Make sure to follow the precautions indicated below, as these are important

messages related to safety.

DA NG ER

WARN I N G

CA U T I O N

NO T E

Failure to follow this message may cause immediate
threat of death or serious injury.

Failure to follow this message may result in death or
serious injury.

Failure to follow this message may cause injury or
failure to the equipment.

A note is not related to product safety, but provides
information about the correct use and operating
procedures to prevent incorrect operation and
malfunction of the equipment.

Precaution from Fukuda Denshi

Fukuda Denshi is liable for the safety, reliability, and performance of its
equipment only if;

Maintenance, modifications, and repairs are carried out by authorized

personnel.

Components are used in accordance with Fukuda Denshi operating

instructions.
If the equipment is used incorrectly and become unusable, Fukuda Denshi is
not liable for the malfunction. Use the equipment only for the purpose specified
in this manual.

i

Graphic Symbols

Refer to the following symbols indicated on the LX-7230N for their meanings.

Symbols indicated on the main unit

Symbol Description

Caution: Refer To Accompanying Documents
Indicates the need to refer to the related accompanying
documents before operation.

Type CF Applied Part with Defibrillation-Proof
Indicates that the degree of protection against electric
shock is Type CF Applied Part with defibrillation-proof.

No Alarm Function
Indicates no alarm function.

Battery Type and Direction
Indicates the battery type and direction.

Symbols indicated on the LCD screen

Symbol Description

Heart Rate Synchronization Mark
This mark flashes synchronizing to the heartbeat.

Battery Mark
Indicates the remaining battery level.

ii

Precautions for Safe Operation of Medical Electrical Equipment

Cautions described here are regarding the general instructions for safety use
to the patient and users. As for cautions about the LX-7230N, please refer to
the following pages.

CA U T I O N

1. Users should have a thorough knowledge of the operation before
using this equipment.

2. Pay attention to the following when installing or storing the
equipment.

Do not install or store in an area where the equipment will be subject
to splashing water.
Do not install or store in an area where the environmental
conditions, such as atmospheric pressure, temperature, humidity,
ventilation, sunlight, dust, sodium, sulfur, will adversely affect the
system.
Place the equipment on a stable surface where there is no
inclination, vibration, or shock (including during transportation).
Do not install or store in an area where chemicals are stored or
gases are evolved.

3. Before operating the equipment, verify the following items.

Check the cable connection and polarity to ensure proper operation
of the equipment.
Ensure that all cables are firmly and safely connected. Especially,
recheck the attachment and connection condition of electrode and
the probe (sensor).
Pay special attention when the equipment is used in conjunction with
other equipment as it may cause erroneous judgment and danger.
Check the remaining battery level.
When replacing the battery, make sure that the battery polarity is
correct. Do not charge the battery.

4. During operation of the equipment, verify the following items.

Do not operate the equipment beyond the time period required for
diagnosis and medical care.
Do not pick up and/or swing the equipment pulling/grabbing the
probe (sensor) or cable part. It may damage the equipment and lead
to measurement error.
Always observe the equipment and patient to ensure safe operation
of the equipment.
If any abnormality is found on the equipment or patient, take
appropriate measures such as ceasing operation of the equipment
and/or detaching the probe (sensor) and/or electrode, in the safest
way for the patient.
Do not allow the patient to come in contact with other equipments.

iii

5. After using the equipment, verify the following items.

Make sure to turn off the power of the equipment.
When unplugging the cables, do not apply excessive force on the
cable and pull from its connector.
Clean the accessories and cables, and keep them together in one
place.
Keep the equipment clean to ensure proper operation for the next
use.
Make sure to remove the batteries if the equipment is not used for a
long time. The leakage from the batteries may damage the
equipment or an explosion from the batteries may occur.

6. If the equipment is damaged and in need of repair, ensure patient
safety by immediately turning the equipment off and remove the
electrodes and/or probe from the patient. User should not
attempt service. Label the unit “OUT OF ORDER” and contact
Fukuda Denshi representative.

7. Do not remodel the equipment.

8. Maintenance Check

Make sure to periodically check the equipment, and accessories.
Before reusing the equipment that has been left unused for a while,
make sure that the equipment works normally and safely.

9. When using electrosurgical knives or defibrillator with this
equipment, take care of the following.

To prevent burn injury to the patient, verify proper attachment of
patient ground plate, ECG electrode type for the electrosurgical
knives, and the quantity of gel, output energy for the defibrillator.
Also, verify that a proper ground is selected.
Some types of equipment other than the above may cause
accidental hazards to the patient and operator due to the conditions
of the equipment. Read the operation manual attached to each
equipment and understand the precautionary instructions prior to
use.

Non-Explosion Proof

DA N G E R

Never operate the equipment in the presence of flammable anesthetics,

high concentration of oxygen. It may cause an explosion or fire.

Never operate the equipment inside a hyperbaric chamber. It may

cause an explosion or fire.

Never operate the equipment where flammable gas or fluid such as

anesthetic, oxygen, and hydrogen are used. It may cause an explosion
or fire.

iv

Precautions about Magnetic Resonance Imaging (MRI)

WARN I N G

Do not operate this equipment in magnetic resonance imaging (MRI)

environments.

When conducting MRI test, remove the electrodes and sensors

connected to the patient (test subject).
The local heating caused by the induced electromotive force may cause
burn injury to the patient (subject). For details, refer to the operation
manual for the MRI testing device.

Electrosurgery Safety

WARN I N G

When using electrosurgical instrument, make sure the contact between

the patient and the ground plate is secured. If the connection is
incomplete, the patient may suffer a burn at the electrode site.

When using an electrosurgical instrument, it may misidentify noise from

the electrosurgical instrument as a heartbeat or arrhythmia.

Defibrillation Safety

WARN I N G

Use only the lead cable specified by Fukuda Denshi when defibrillating.

If used by unspecified lead cable, the equipment may be damaged,
resulting in a safety hazard.

When using the defibrillator, keep away from the electrodes or

medicament applied to the patient chest. If this is not possible, remove
the electrodes or medicament before using it.
If the defibrillator paddles are directly in contact with the electrodes or
medicament, an electrical shock may result from the discharged energy.

When using the defibrillator, do not touch the patient and the metal part

of the equipment or cables. Electric shock may result from the
discharged energy.

v

Precautions about the Pacemaker

WARN I N G

Minute ventilation rate-adaptive implantable pacemakers can

occasionally interact with certain cardiac monitoring and diagnostic
equipment, causing the pacemakers to pace at their maximum
programmed rate. The cardiac monitoring and diagnostic equipment
may possibly send wrong information.
If such event occurs, disconnect the cardiac monitoring and diagnostic
equipment, or follow the procedures described in the operation manual
of the pacemaker.
(For more details, contact FUKUDA DENSHI personnel, your
institution’s professionals, or your pacemaker distributors.)

Reference

“Minute Ventilation Rate-Adaptive Pacemakers”
FDA alerts health professionals that minute ventilation rate-adaptive
implantable pacemakers can occasionally interact with certain cardiac
monitoring and diagnostic equipment, causing pacemakers to pace at their
maximum programmed rate.
[Based on a safety bulletin issued by FDA Center for Devices and Radiological
Health on October 14, 1998]

ECG meter may continue to count the pacemaker rate during

occurrences of cardiac arrest or arrhythmias. Do not rely entirely upon
the ECG meter alarms. Keep pacemaker patients under close
surveillance. Check this manual for disclosure of the pacemaker pulse
rejection capability of this equipment.

Precautions about the LX-7230N

WARN I N G

Do not connect cables not authorized by Fukuda Denshi to any I/O

connector. If done so by mistake, the LX-7230N cannot deliver its
maximum performance and may be damaged, resulting in a safety

hazard.
Do not use this equipment with multiple patients simultaneously.
This equipment itself has no alarm function. Do not use it if an alarm

function is necessary. The alarm function with the receiving monitor,

refer to the operation manual of the receiving monitor.

CA U T I O N

Do not pick up and/or swing the LX-7230N pulling/grabbing the probe
(sensor) or cord part. The cable could break or get disconnected from the
LX-7230N. And it may hit people or damage other equipment around.

vi

Precautions about Waterproof

CA U T I O N

Replace the “Battery Compartment Lid” of the LX-7230N regularly to

keep the performance of waterproof. If not regularly replaced, the quality

of the lid will deteriorate and cannot keep the waterproof performance.

For details about the regular replacement, contact your local Fukuda

Denshi service representative.
The lid may be damaged from high impact. If the LX-7230N is dropped

or is subjected to a high impact, make sure that the lid is not damaged.
However, the SpO2 probes (sensors) are not waterproof. Do not take a

bath with them, and ensure to be away from liquid.
Do not use the LX-7230N wet. Always wipe the LX-7230N with a soft

cloth and dry it thoroughly before use.

Precautions about ECG

CA U T I O N

When removing electrodes from the patient, remove them carefully and

slowly. Do not apply excessive force to remove them. Otherwise, it may

damage the skin.
There are some cases when the pacemaker pulse cannot be detected

depending on the pacemaker type, pulse voltage, pulse width, electrode

lead type (unipolar, bipolar), electrode placement, or lead method which

causes the pacemaker pulse amplitude to decrease and disables

pacemaker pulse detection.
If signals similar to a pacemaker pulse are present, such as electric

blanket noise or excessive AC frequency noise, these may be

erroneously detected and displayed as a pacemaker pulse. In this case,

check the condition of the electrodes and ECG lead cable to resolve the

cause or turn off the pacemaker detection setting on the receiving

monitor.

vii

Precautions about SpO2

WARN I N G

During SpO2 monitoring, always use the probe (sensor) specified by

Fukuda Denshi. If any other probe (sensor) is used, a high temperature

rise of the probe (sensor) may place the patient in danger of burns in

the worst case.
When the SpO2 probe (sensor) is in a connector-off condition, the SpO

alarm will not be generated on the receiving monitor. Make sure that the

SpO2 probe (sensor) is securely connected. If the SpO

waveform/numeric data is not displayed, check the patient’s condition

and pay attention not to miss the connector-off condition.
When measuring the SpO2 of a patient with high fever or peripheral

circulatory insufficiency, check the probe (sensor) attachment

periodically and change the attachment site. The temperature of the

attachment site will rise 2 to 3 C due to the sensor heat which may

result in compression necrosis and burn injury.
Even a short duration of attachment may inhibit the blood flow and

generate compression necrosis and burn injury.
When securing the probe (sensor) with tape, do not apply the tape too

tight. At the same time, check the blood flow constantly so that

congestion is not generated at the peripheral. When removing the tape,

remove it slowly with care not to damage the patient’s skin.

CA U T I O N

For the following case, accurate measurement may not be possible.

Patient with excessive abnormal hemoglobin (COHb, MetHb)
Patient with the pigment injected to the blood
Patient receiving CPR treatment
Placement of SpO2 probe (sensor) on limb with a blood-pressure cuff,

arterial catheter, or intravascular line

When measuring at placement position with venous pulse
Patient with body motion
Patient with small pulse
Excessive body motion (patient’s motion)
Excessive light (direct sunlight, fluorescent, light therapy equipment,

surgical light, infrared heat ramp, etc.)

External colorant such as nail polish
Abnormally low or high hemoglobin concentration
Electrosurgery
Influence of electromagnetic waves from other electronics devices
High-intensity radio waves from mobile phones

2

2

viii

Precautions about Output Signal

WARN I N G

Do not use the output signal of the monitor that receives radio wave signal
from the LX-7230N as the trigger signal for IABP, MRI echocardiographic,
or defibrillator for the following reasons.

It may lead to a delay of operating timing due to the delay time of

waveform transmission.

A trigger signal unrelated to the heart rate may be generated due to

the interfusion of spike noise at weak electric field.

Precautions about Accessories and Optional Accessories

WARN I N G

Use only the accessories, such as ECG Lead cable and SpO2 probe
(sensor), specified by Fukuda Denshi for the LX-7230N. Otherwise, the LX­7230N cannot deliver its maximum performance and may be damaged,
resulting in a safety hazard.

CA U T I O N

Do not reuse disposable products.
Store the disposable products properly as mentioned in their user

manuals.

Precautions about Battery

WARN I N G

Use new "AA" size (“LR06” size) alkaline cell.
Install the battery with the correct polarity.
Do not charge the battery. Any attempt to charge the battery may cause

it to leak or break.
Do not short the (+) and (-) terminals. It may result in exothermic heat

and fire.
Do not throw the battery into fire. It may explode.

ix

Precautions about Disposing of Equipment, Accessories, or
Components

CA U T I O N

When disposing of the equipment, accessories, or components, use an

industrial waste distributor. Do not dispose of as ordinary waste.
Used disposal items (ECG electrodes, etc.) shall be discarded as

medical waste.

Precautions about Disposing of Battery

CA U T I O N

Obey the local municipal rule to dispose the used dry cell battery.

Precautions for Use of Medical Telemeter

WAR N I N G

The LX-7230N transmitter must not be co-located or operated in

conjunction with any other antenna or transmitter.
The LX-7230N complies with FCC radiation exposure limits set forth for

a controlled environment and meets the FCC radio frequency (RF)

Exposure Guidelines. The LX-7230N has very low levels of RF energy

that are deemed to comply without testing of specific absorption ratio

(SAR).
Operation of LX-7230N requires the prior coordination with a frequency

coordinator designated by the FCC for the Wireless Medical Telemetry

Service.
This radio frequency device is susceptible to interference from outside

sources. Interference may prevent the monitoring of patients connected

to this equipment. If a problem exists, contact your local service

representative.
The LX-7230N transmits vital signs to the receiving monitor using radio

wave signal. Under unstable radio wave signals, the receiving monitor

will not generate any alarms. This situation may miss sudden change in

the patient's condition and may cause a serious accident. Under

unstable radio wave signals, check the patient status consistently under

this situation. To get stable radio wave signals, make sure to have a

proper telemetry installation.

CAUTION

For installation, make sure the following.

The medical institution (hereinafter referred to as the “Institution”) must
decide the telemetry installation plan for the medical department in order

x

to prevent interference and interference between transmitters (telemetry

based on destination country’s radio law). When telemetry has already
been installed and been used, radio format, frequency, and antenna power
are required to be examined to prevent interference.
When using telemetry, which requires zone location, the Institution is to
set up the zones as an operation unit for each transmitter to prevent
electronic interference between telemetry throughout the Institution.
When using telemetry, which requires zone location, display and identify
each prepared zone in the equipment.
When laying receiver antenna for each transmitter, the Institution has to
examine the installation so that electronic interference does not occur.
Based on the above examination result, the Institution should install each
receiver antenna as required.

For management, make sure to follow the precautions below.

The Institution should appoint a person (hereinafter referred to as the
“Overall Manager”) to manage the wireless channels for the whole
Institution.
And when using telemetry, which requires zone location, the Institution
should nominate a person (hereinafter referred to as the “Zone Manager”)
to manage the wireless channels in each zone. However, when using such
telemetry in a local Institution, one person can perform both functions.
The Overall Manager and Zone Manager must be selected from people
who understand the characteristics and functionality of telemetry systems,
and are skilled in operating telemetry.
When installing telemetry, the Overall Manager and the Zone Manager
have to understand the precautions for use of telemetry in advance.
The Overall Manager is responsible for maintenance of wireless channel
and storage and maintenance of telemeter in the overall medical facilities
to give proper instructions to the Zone Manager when using telemetry
needing zone alignment, and to the telemetry user when using telemetry
not-needing zone alignment.
The Overall Manager should create a management log (hereinafter
referred to as the “log”), which contains a list of the management status of
the wireless channels for the whole Institution. When changing a wireless
channel, register it in the log and give proper instructions to the Zone
Manager or to the user.
The Zone Manager assumes responsibility for managing the wireless
channels, storing, and managing telemetry.
The Zone Manager assigns the transmitter to the user, and provides
enough education for use inside the zone.
The telemetry user verifies operation of the transmitter/receiver before
use.
The telemetry user, if using the telemetry in a zone location, follows the
instructions of the Zone Manager for the zone and gives instructions to the
patient if required.
When interference or breakdown occurs in telemetry communication, the
user is required to inform the Zone Manager and the Overall Manager of
the problems. The Zone Manager and Overall Manager are to deal with
the problem properly and/or contact their nearest Fukuda Denshi
representative for service.

xi

Electromagnetic Compatibility

The performance of this equipment under electromagnetic environment
complies with IEC 60601-1-2 (2007).

Precautions for Safe Operation under Electromagnetic Influence

CA U T I O N

If any sorts of electromagnetic wave, magnetic field, or static electricity
exist around the equipment, noise interference or malfunction of the
equipment may occur. If any unintended malfunction or noise occurs
during monitoring, check the magnetic influence and take appropriate
countermeasures.
The following are examples of the common cause and countermeasures.

Mobile Phone

The radio wave may cause malfunction to the equipment.
Mobile phones and radio sets should be turned off in the room
(building) where medical device is located.

Static Electricity

In a dry environment (room), static electricity is likely to occur. Take
the following countermeasures.

Both operator and patient should remove any static electricity before
entering the room
Humidify the room

xii

EMC Guidance

This equipment complies with IEC 60601-1-2 (2007). However, if portable
transmitter or wireless LAN equipment is used extremely nearby, the
electromagnetic influence may largely exceed the compliance level and may
cause unexpected phenomenon such as noise interference on the waveform,
etc.
Therefore, this equipment should be used in a location specified by each
medical institution. If any unexpected noise interference on the waveform or
failure to the peripheral device occurs, stop using the equipment and follow the
instruction of the technician.

The following is the information relating to EMC (Electromagnetic
Compatibility).
(When using this equipment, verify that it is used within the environment
specified below.)

Compliance to the Electromagnetic Emissions

The LX-7230N is intended for use in the electromagnetic environment
specified below. The customer or the user of the LX-7230N should assure that
it is used in such an environment.

Emission Test Compliance

RF Emission

CISPR 11

RF Emission

CISPR 11

Harmonic Emission

IEC 61000-3-2

Voltage Limit /

Flicker Emission

IEC 61000-3-3

Group 1

Class A

N/A

N/A

Electromagnetic Environment –

The LX-7230N uses RF energy only for
its internal function. Therefore, its RF
emissions are very low and are not likely
to cause any interference in nearby
electronic equipment.

This LX-7230N is suitable for use in all
establishments other than domestic
establishments.

Guidance

xiii

Compliance to the Electromagnetic Immunity (1)

magnetic fields should

The LX-7230N is intended for use in the electromagnetic environment
specified below. The customer or the user of the LX-7230N should assure that
it is used in such an environment.

Immunity Test

Electrostatic
Discharge
(ESD)
IEC 61000-4-2

Electrical fast
transient/burst
IEC 61000-4-4

Surge
IEC 61000-4-5

Voltage dips,
short
interruptions
and voltage
variations on
power supply
input lines.
IEC 61000-4-11

Power
Frequency
(50/60Hz)
Magnetic Field
IEC 61000-4-8

Note:

UT is the AC mains voltage prior to application of the test level.

xiv

IEC 60601-1-2

Test Level

±6kV contact
±8kV air

±2kV:
Power supply lines
±1kV:
Input/output lines
±1kV:
differential mode
±2kV:
common mode
<5% UT
(>95% dip in UT)
for 0.5 cycle

40% UT
(60% dip in UT)
for 5 cycles

70% UT
(30% dip in UT)
for 25 cycles

<5% UT
(>95% dip in UT)
for 5sec.

3A/m 3A/m

Compliance

Level

±6kV contact
±8kV air

N/A

N/A

N/A

Electromagnetic

Environment

Guidance

Floors should be
wood, concrete or
ceramic tile. If floors
are covered with
synthetic material, the
relative humidity
should be at least
30%.

Power frequency

be at levels
characteristic of a
typical location in a
typical commercial or
hospital environment.

Compliance to the Electromagnetic Immunity (2)

Electromagnetic Environment

a)

The LX-7230N is intended for use in the electromagnetic environment
specified below. The customer or the user of the LX-7230N should assure that
it is used in such an environment.

Immunity

Test

Portable and mobile RF

Conducted RF
IEC 61000-4-6

Radiated RF
IEC 61000-4-3

Where P is the maximum output

Note 1: At 80MHz and 800MHz, the higher frequency range applies.
Note 2: These guidelines may not apply in all situations. Electromagnetic propagation is

Field strengths from fixed transmitters, such as base stations for radio

(cellular/cordless) telephones and land mobile radios, amateur radio, AM and FM
radio broadcast and TV broadcast cannot be predicted theoretically with accuracy.
To assess the electromagnetic environment due to fixed RF transmitters, an
electromagnetic site survey should be considered. If the measured field strength in
the location in which the LX-7230N is used exceeds the applicable RF compliance
level above, the LX-7230N should be observed to verify normal operation. If
abnormal performance is observed, additional measures may be necessary, such
as re-orienting or relocating the LX-7230N.

b)

Over the frequency range 150kHz to 80MHz, field strength should be less than

3V/m.

IEC60601-1-2

Test Level

3Vrms
150kHz to 80MHz

3V/m
80MHz to 2.5GHz

affected by absorption and reflection from structures, objects and people.

Compliance

Level

3Vrms

3V/m

Guidance

communications equipment should
be used no closer to any part of the
LX-7230N, including cables, than
the recommended separation
distance calculated from the
equation applicable to the
frequency of the transmitter.

Recommended Separation Distance

d

= 1.2P

d

= 1.2P 80MHz to 800MHz

d

= 2.3P 800MHz to 2.5GHz

power rating of the transmitter in
watts (W) according to the
transmitter manufacturer and d is
the recommended separation
distance in meters (m).

Field strengths from fixed RF
transmitters, as determined by an
electromagnetic site survey
should be less than the compliance
level in each frequency range

Interference may occur in the
vicinity of equipment marked with
the following symbol:

a)

,

b)

.

xv

Recommended Separation Distances between Portable and

Mobile RF Communications Equipment and the LX-7230N

The LX-7230N is intended for use in an environment in which radiated RF
disturbances are controlled. The customer or the user of the LX-7230N can
help prevent electromagnetic interference by maintaining a minimum distance
between portable and mobile RF communications equipment (transmitters)
and the LX-7230N as recommended below, according to the maximum output
power of the communications equipment.

Rated Maximum
Output Power of

Transmitter

(W)

0.01 0.12 0.12 0.23

0.1 0.38 0.38 0.73

10 3.8 3.8 7.3

100 12 12 23
For transmitters rated at a maximum output power not listed above, the recommended
separation distance d in meters (m) can be determined using the equation applicable to
the frequency of the transmitter, where P is the maximum output power rating of the
transmitter in watts (W) according to the transmitter manufacturer.

Note 1 : At 80MHz and 800MHz, the separation distance for the higher frequency range

Note 2 : These guidelines may not apply in all situations. Electromagnetic propagation

Separation Distance according to Frequency of Transmitter (m)

150kHz to 80MHz

d

1 1.2 1.2 2.3

applies.

is affected by absorption and reflection from structures, objects and people.

= 1.2P

80MHz to 800MHz

d

= 1.2P

800MHz to 2.5GHz

d

= 2.3P

xvi

CONTENTS

Safety Precautions ..................................................................................... i

Precaution from Fukuda Denshi ....................................................... i

Graphic Symbols .............................................................................. ii

Precautions for Safe Operation of Medical Electrical Equipment .... iii

Non-Explosion Proof ....................................................................... iv

Precautions about Magnetic Resonance Imaging (MRI) ................. v

Electrosurgery Safety ...................................................................... v

Defibrillation Safety ......................................................................... v

Precautions about the Pacemaker .................................................. vi

Precautions about the LX-7230N .................................................... vi

Precautions about Waterproof ................................. ...................... vii

Precautions about ECG .................................... ............................. vii

Precautions about SpO2................................................................ viii

Precautions about Output Signal ............................... ..................... ix

Precautions about Accessories and Optional Accessories ............. ix

Precautions about Battery ............................................................... ix

Precautions about Disposing of Equipment, Accessories,

or Components ........................................................................... x

Precautions about Disposing of Battery .......................................... x

Precautions for Use of Medical Telemeter ...................................... x

Electromagnetic Compatibility ............................................................ xii

Precautions for Safe Operation under Electromagnetic Influence .. xii

EMC Guidance .............................................................................. xiii

1. General Description ............................................................................. 1

2. Names of Parts and Their Functions .................................................... 3

3. Preparation .......................................................................................... 5

1) Installing the Batteries ................................................................ 5

2) Operating Power Switch ............................................................. 7

4. ECG Monitoring ................................................................................... 9

Connecting the ECG Lead Cable and Electrodes ...................... 9

Attaching the Electrodes .......................................................... 12

Connecting the ECG Lead Cable to the LX-7230N ................. 13

5. Respiration Monitoring ....................................................................... 15

6. SpO

Monitoring ................................................................................. 17

2

SpO2 Monitoring ............................................................................ 18

7. Measurement ..................................................................................... 35

Starting Screen ........................................................................ 35

Waveform Display Screen .................................. ..................... 35

Battery Level Check ................................................................ 37

Waveform Display ...................................... ............................. 37

xvii

8. Operation .......................................... ................................................. 47

Changing Setup ....................................................................... 47

Restarting the LCD display ...................................................... 51

Pressing the EVENT button ..................................................... 51

9. Other Setting Items ............................................................................ 53

Changing the Time Constant ............................ ....................... 54

Changing the Detection Sensitivity of the Pacemaker Pulse ... 55

Changing the Respiration Detection Signal ON/OFF ............... 56

Changing the LCD Contrast ..................................................... 56

10. Changing the Transmitter Channel and Group ID ............................ 57

Changing the Transmitter Channel .......................................... 57

Changing the Group ID ............................................................ 57

11. Troubleshooting ........................................ ....................................... 59

List of Displayed messages ..................................................... 59

Troubleshooting ....................................................................... 61

In Case of Dropping the LX-7230N into Water ........................ 63

12. Cleaning and Disinfection ................................................................ 65

Cleaning and Disinfecting the LX-7230N ................................. 65

Cleaning the ECG lead cable .................................................. 66

Cleaning and Disinfecting the SpO2 probe (sensor) ................ 66

13. Maintenance and Inspection ............................................................ 67

14. Standard and Optional Accessories ................................................. 69

Standard Accessories .............................................................. 69

Optional Accessories ............................................................... 70

15. Specification ..................................... ................................................ 73

Specification ............................................................................ 73

Functional Testers and Patient Simulator for SpO2

measurement ........................................................................... 76

Displays ............................................ ....................................... 77

Details of the “ELECTRODE?” Message ................................. 79

List of Setup Items ................................................................... 80

xviii

1. General Description

The LX-7230N is a radio telemetry transmitter designed to measure the ECG,
respiration waveform, SpO2 (functional oxygen saturation of arterial
hemoglobin), pulse waveform with two “AA” size (“LR06” size) alkaline
batteries.
Information such as ECG measurements, respiration waveform, SpO2
measurements, pulse waveform, battery level, and the conditions of the ECG
electrodes and SpO2 probe (sensor) are displayed on the LCD of the front
panel.
ECG lead selection is available using the two buttons (Enter and ) on the
front panel. (In case of using a 3-electrode lead cable or a 5-electrode chest
lead cable)
The LX-7230N can also function as a transmitter to measure only the
ECG/Respiration without SpO2 or to measure only the SpO2 without
ECG/Respiration.

Before using the LX-7230N, read also the operation manual of the patient
monitor at the receiving side thoroughly.

LX-7230N: Built-in Nellcor® SpO2 Module

External Appearance

LX-7230N

1

1. General Description

Blank Page

2

A

2. Names of Parts and Their Functions

Neck Strap Hole

Attaches the neck strap.

ECG/RESP Input Connector

(Type CF Applied Part)
Connects the ECG lead cable to
measure ECG and respiration
waveform.

Refer to “Safety Precautions” in this
manual’s preface.

Refer to “Safety
Precautions” in this
manual’s preface.

Enter button

Uses for setup.

SpO2 Input Connector

Connects the SpO2 probe (sensor).

button

Uses for setup.

Channel Number Label

Indicates transmitter channel number.

LCD

Displays measurement waveform and
transmitter information.

Power Switch

Turn ON/OFF the power.

EVENT Button

ctivates the function assigned on the

receiving monitor.

Electrode Position Label

Indicates standard ECG electrode
position.

3

2. Names of Parts and Their Functions

transmitter is operated.

Refer to “Safety
Precautions” in this
manual’s preface.

Battery Lid Lock Lever

Uses to open/lock the battery
compartment lid.

Battery Compartment Lid

This is the lid for the battery
compartment.
Make sure to close it when the

4

3. Preparation

1) Installing the Batteries

The LX-7230N functions with two "AA" size (“LR06” size) alkaline batteries.
With new batteries, the LX-7230N is capable of the following operation.

LX-7230N: approximately 2.5 days
(However, continuous operating time may be shorter than the above
mentioned time depending on the application of the SpO2 probe (sensor).)

Unplug the ECG lead cable when the battery compartment lid is

opened. Otherwise, patient leakage current beyond the allowable value

may occur.
Use new "AA" size (“LR06” size) alkaline batteries.
Do not short out the (+) and (-) terminals. It may result in exothermic

heat and fire, the leakage from the batteries may damage the

equipment, or an explosion from the batteries may occur.
Install the batteries with the correct polarity.
Do not use a disassembled or a damaged battery due to drop or shock.

The leakage from the batteries may damage the equipment, or an

explosion from the batteries may occur.
Do not use different types of batteries at the same time. The leakage

from the batteries may damage the equipment, or an explosion from the

batteries may occur.
Remove the exhausted batteries immediately. The leakage from the

batteries may damage the equipment, or an explosion from the batteries

may occur.
If the transmitter is not in use for a long period of time, remove the

batteries and store the equipment in an appropriate place. If the

batteries are left in the transmitter for a long period of time, the leakage

from the batteries may damage the equipment or an explosion from the

batteries may occur.
Make sure to replace the two batteries simultaneously. If new and used

batteries are mixed, a leakage from the batteries may damage the

equipment or an explosion from the batteries may occur.

Use only alkaline batteries. Other batteries will shorten the continuous

operating time.
Once the power switch is on the OFF position, then open the battery

compartment lid.
Do not replace the batteries with wet hands.
In case of storing the used or unused batteries, make sure that the

terminals are not touching other batteries or metal parts.

WAR N I N G

CA U T I O N

5

3. Preparation

Lift the lock lever to open the battery
compartment lid as shown in the left picture.

Install new batteries according to the polarity
indication inside the battery compartment.
Make sure to first Insert the battery into the
battery compartment from the minus (-)
terminal as shown in the left picture.

Hook the lock lever on the projection from
the body and press it down until it is
horizontal (flat position).

CA U T I O N

Make sure that any foreign particles, such as hairs, are not held on

the battery compartment lid and dust is not adhered to the edge of the
lid to prevent water entering into the battery compartment area.

Make sure to only turn ON the LX-7230N after closing the battery

compartment lid.

6

2) Operating Power Switch

Turning the power switch to “ON”

After the power is turned ON, make sure to check the remaining battery level
on the LCD screen.
Refer to the following symbol about the remaining battery level.

Turning the power switch to “OFF”

Rotate the power switch to the left until it clicks.

LCD screen turns ON and measurement starts.
Regarding the LCD screen, refer to page 35 (7. Measurement).
The screen automatically turns itself OFF after 180 seconds.

Battery Symbol Remaining Battery Level

Full

Getting low but still available

Nearly empty;
Replace the battery

The battery level estimation is in case of using alkaline batteries.

Rotate the power switch to the right until it clicks.

3. Preparation

7

3. Preparation

Blank Page

8

4. ECG Monitoring

When the transmitter is used without the SpO2 probe (sensor), it will measure
only ECG and respiration.

CA U T I O N

When using the transmitter with only the ECG lead cable, SpO2
measurements on the receiving monitor shall be turned off to prevent an
erroneous alarm.

Connecting the ECG Lead Cable and Electrodes

The optional ECG lead cables for LX-7230N are as follows.

ECG Lead Cables

AHA color code:

Item No. Applicable Lead

CMT-01HTH-0.8DA Limb Lead (1CH)

CMT-02HTH-0.8DA Limb Lead (2CH)

CMT-03HTH-0.8DA

CMT-01FTH-0.8DA Limb Lead (1CH)

CMT-02FTH-0.8DA Limb Lead (2CH)

CMT-03FTH-0.8DA

Limb Lead (1CH)
+Chest (1CH)

Limb Lead (1CH)
+Chest (1CH)

3-electrode Hook Type
(White, Black, Red)
4-electrode Hook Type
(White, Black, Red, Green)
5-electrode Hook Type
(White, Black, Red, Green, Brown)
3-electrode Clip Type
(White, Black, Red)
4-electrode Clip Type
(White, Black, Red, Green)
5-electrode Clip Type
(White, Black, Red, Green, Brown)

WAR N I N G

Use only the specified lead cable from Fukuda Denshi. Otherwise, proper
monitoring may not be performed, and also it may fail defibrillation or cause
a malfunction of the equipment when the equipment is used with a
defibrillator.

Remark

9

4. ECG Monitoring

For 3-

electrode lead cable

For 4-

electrode lead cable

(LA)

(RA)

(RL)

The relations between the attached electrode positions and lead method are
as follows. Attach the electrodes to monitor proper waveform.

For AHA color code electrode position (No. CMT-01HTH-0.8DA, CMT-01FTH-0.8DA)

White

Standard Limb leads

Standard Limb leads can be selected from lead I, lead II, or lead III under
the setting of the equipment.

Refer to “8. Operation Changing Setup ECG Display Screen (1)
<<Switching Lead>>” in page 47.

For AHA color code electrode position (No. CMT-02HTH-0.8DA, CMT-02FTH-0.8DA)

White
(RA)

Red
(LL)

Black

Black

(LA)

Green

Standard Limb leads

Two leads measurements, lead I and II are fixed. Lead III, aVR, aVL, and
aVF can be also displayed from the setting on the receiving monitor. For
details, refer to the operation manual of the receiving monitor.

10

Red
(LL)