Fukuda Denshi Co LX7120G ECG & Respiration Transmitter User Manual Short Term Confidential

Fukuda Denshi Co Ltd ECG & Respiration Transmitter Short Term Confidential

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LX7120G User Manual HTML Version

(Short-Term Confidential) User Manual

ECG & Respiration Transmitter

LX-7120(G)

Operation Manual

● Before using this equipment, read this operation manual thoroughly.

● Keep this manual near the device for future reference.

CAUTION

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

CAUTION

Users are advised to periodically contact the FCC or specified frequency

coordinator and determine if other or your transmitter frequencies that

may cause interference.

CAUTION

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.

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.

DANGER Failure to follow this message may cause immediate

threat of death or serious injury.

WARNING Failure to follow this message may result in death or

serious injury.

CAUTION Failure to follow this message may cause injury or

failure to the equipment.

NOTE

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.

Graphic Symbols

Refer to the following symbols indicated on the LX-7120(G) 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.

iii

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-7120(G), please refer to

the following pages.

CAUTION

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.

 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

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 electrode, in the safest way for the patient.

 Do not allow the patient to come in contact with other equipments.

CAUTION

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 battery if the equipment is not used for a

long time. The leakage from the battery may damage the equipment

or an explosion from the battery 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 cable 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

DANGER

 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.

Precautions about Magnetic Resonance Imaging (MRI)

WARNING

 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

WARNING

 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

WARNING

 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.

Precautions about the Pacemaker

WARNING

 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.

[October 14, 1998 (Letter: www .fda.gov/cdrh/safety.html) – FDA]

 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 instrument.

Precautions about the LX-7120(G)

WARNING

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

connector. If done so by mistake, the LX-7120(G) 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.

CAUTION

Do not pick up and/or swing the LX-7120(G) pulling/grabbing the cord part.

The cable could break or get disconnected from the LX-7120(G). And it

may hit people or damage other equipment around.

vii

Precautions about Waterproof

CAUTION

 Replace the “Battery Compartment Lid” of the LX-7120(G) 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-7120(G) is dropped

or is subjected to a high impact, make sure that the lid is not damaged.

 Do not use the LX-7120(G) wet. Always wipe the LX-7120(G) with a soft

cloth and dry it thoroughly before use.

Precautions about ECG

CAUTION

 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.

Precautions about Output Signal

WARNING

Do not use the output signal of the monitor that receives radio wave signal

from the LX-7120(G) 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.

viii

Precautions about Accessories and Optional Accessories

WARNING

Use only the accessories, such as ECG Lead cable, specified by Fukuda

Denshi for the LX-7120(G). Otherwise, the LX-7120(G) cannot deliver its

maximum performance and may be damaged, resulting in a safety hazard.

CAUTION

 Do not reuse disposable products.

 Store the disposable products properly as mentioned in their user

manuals.

Precautions about Battery

WARNING

 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.

Precautions about Disposing of Equipment, Accessories, or

Components

CAUTION

 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

CAUTION

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

Precautions for Use of Medical Telemeter

WARNING

 The LX-7120(G) transmitter must not be co-located or operated in

conjunction with any other antenna or transmitter.

 This equipment complies with FCC/IC radiation exposure limits set forth

for an uncontrolled environment and meets the FCC radio frequency

(RF) Exposure Guidelines and RSS-102 of the IC radio frequency (RF)

Exposure rules. This equipment has very low levels of RF energy that

are deemed to comply without testing of specific absorption rate(SAR).

 Operation of LX-7120(G) 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-7120(G) 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

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.

CAUTION

 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.

Electromagnetic Compatibility

The performance of this equipment under electromagnetic environment

complies with IEC 60601-1-2 (2007).

Precautions for Safe Operation under Electromagnetic Influence

CAUTION

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-7120(G) is intended for use in the electromagnetic environment

specified below. The customer or the user of the LX-7120(G) should assure

that it is used in such an environment.

Emission Test Compliance Electromagnetic Environment –

Guidance

RF Emission

CISPR 11 Group 1

The LX-7120(G) 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.

RF Emission

CISPR 11 Class A

This LX-7120(G) is suitable for use in all

establishments other than domestic

establishments.

Harmonic Emission

IEC 61000-3-2 N/A

Voltage Limit /

Flicker Emission

IEC 61000-3-3

N/A

xiii

●Compliance to the Electromagnetic Immunity (1)

The LX-7120(G) is intended for use in the electromagnetic environment

specified below. The customer or the user of the LX-7120(G) should assure

that it is used in such an environment.

Immunity Test IEC 60601-1-2

Test Level Compliance

Level

Electromagnetic

Environment

Guidanc

Electrostatic

Discharge

(ESD)

IEC 61000-4-2

±6kV contact

±8kV air

±6kV contact

±8kV air

Floors should be

wood, concrete or

ceramic tile. If floors

are covered with

synthetic material, the

relative humidity

should be at least

30%.

Electrical fast

transient/burst

IEC 61000-4-4

±2kV:

Power supply lines

±1kV:

Input/output lines

N/A

Surge

IEC 61000-4-5

±1kV:

differential mode

±2kV:

common mode

N/A

Voltage dips,

short

interruptions

and voltage

variations on

power supply

input lines.

IEC 61000-4-11

<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.

N/A

Power

Frequency

(50/60Hz)

Magnetic Field

IEC 61000-4-8

3A/m 3A/m

Power frequency

magnetic fields should

be at levels

characteristic of a

typical location in a

typical commercial or

hospital environment.

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

xiv

●Compliance to the Electromagnetic Immunity (2)

The LX-7120(G) is intended for use in the electromagnetic environment

specified below. The customer or the user of the LX-7120(G) should assure

that it is used in such an environment.

Immunity

Test IEC60601-1-2

Test Level Complianc

e Level Electromagnetic Environment

Guidance

Portable and mobile RF

communications equipment should

be used no closer to any part of the

LX-7120(G), including cables, than

the recommended separation

distance calculated from the

equation applicable to the frequency

of the transmitter.

Recommended Separation Distance

Conducted RF

IEC 61000-4-6

3Vrms

150kHz to 80MHz

3Vrms d = 1.2 P

Radiated RF

IEC 61000-4-3

3V/m

80MHz to 2.5GHz

3V/m d = 1.2 P 80MHz to 800MHz

d = 2.3 P 800MHz to 2.5GHz

Where P is the maximum output

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 a), should

be less than the compliance level in

each frequency range b).

Interference may occur in the vicinity

of equipment marked with the

following symbol:

Note 1: At 80MHz and 800MHz, the higher frequency range applies.

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

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

)

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-7120(G) is used exceeds the applicable RF

compliance level above, the LX-7120(G) 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-7120(G).

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

3V/m.

●Recommended Separation Distances between Portable and

Mobile RF Communications Equipment and the LX-7120(G)

The LX-7120(G) is intended for use in an environment in which radiated RF

disturbances are controlled. The customer or the user of the LX-7120(G) can

help prevent electromagnetic interference by maintaining a minimum distance

between portable and mobile RF communications equipment (transmitters)

and the LX-7120(G) as recommended below, according to the maximum

output power of the communications equipment.

Rated Maximum

Output Power of

Transmitter

(W)

Separation Distance according to Frequency of Transmitter (m)

150kHz to 80MHz

d = 1.2 P

80MHz to 800MHz

d = 1.2 P

800MHz to 2.5GHz

d = 2.3 P

0.01 0.12 0.12 0.23

0.1 0.38 0.38 0.73

1 1.2 1.2 2.3

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

applies.

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

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

xvi

Blank Page

xvii

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-7120(G) ................................................. vi

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

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

Precautions about Output Signal ................................................... vii

Precautions about Accessories and Optional Accessories ........... viii

Precautions about Battery ............................................................. viii

Precautions about Disposing of Equipment, Accessories, or Components

................................................................................................. viii

Precautions about Disposing of Battery ........................................ viii

Precautions for Use of Medical Telemeter ...................................... ix

Electromagnetic Compatibility ............................................................. xi

Precautions for Safe Operation under Electromagnetic Influence ... xi

EMC Guidance ............................................................................... xii

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

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

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

1) Installing the Battery ................................................................... 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-7120(G) ............... 13

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

6. Measurement ..................................................................................... 17

■ Starting Screen ........................................................................ 17

■ Waveform Display Screen ....................................................... 17

■ Battery Level Check ................................................................ 17

■ Waveform Display ................................................................... 18

7. Operation ........................................................................................... 25

■ Changing Setup ....................................................................... 25

■ Restarting the LCD display ...................................................... 29

■ Pressing the EVENT button ..................................................... 29

xviii

8. Other Setting Items ............................................................................ 31

■ Changing the Time Constant ................................................... 32

■ Changing the Detection Sensitivity of the Pacemaker Pulse ... 33

■ Changing the Respiration Detection Signal ON/OFF ............... 34

■ Changing the LCD Contrast ..................................................... 34

9. Changing the Transmitter Channel and Group ID .............................. 36

■ Changing the Transmitter Channel .......................................... 36

■ Changing the Group ID ............................................................ 36

10. Troubleshooting ............................................................................... 39

■ List of Displayed messages ..................................................... 39

■ Troubleshooting ....................................................................... 40

■ In Case of Dropping the LX-7120(G) into Water ...................... 42

11. Cleaning and Disinfection ................................................................ 43

■ Cleaning and Disinfecting the LX-7120(G) .............................. 43

■ Cleaning the ECG lead cable .................................................. 44

12. Maintenance and Inspection ............................................................ 45

13. Standard and Optional Accessories ................................................. 47

■ Standard Accessories .............................................................. 47

■ Optional Accessories ............................................................... 48

14. Specification ..................................................................................... 49

■ Specification ............................................................................ 49

■ Displays ................................................................................... 52

■ Details of the “ELECTRODE?” Message ................................. 53

■ List of Setup Items ................................................................... 54

1. General Description

The LX-7120(G) is a radio telemetry transmitter designed to measure the ECG

and respiration waveform with one (1) “AA” size (“LR06” size) alkaline battery.

Information such as ECG measurements, respiration waveform, battery level,

and the conditions of the ECG electrodes 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)

Before using the LX-7120(G), read also the operation manual of the patient

monitor at the receiving side thoroughly.

External Appearance

1. General Description

Blank Page

2. Names of Parts and Their Functions

Battery Lid Lock Lever

Uses to open/lock the

battery compartment lid.

Enter button

Uses for setup.

▽ button

Uses for setup.

Neck Strap Hole

Attaches the neck strap.

ECG/RESP Input Connector

Connects the ECG lead cable

to measure ECG and

respiration waveform.

Refer to “Safety

Precautions” in this

manual’s preface.

Channel Number Label

Indicates transmitter

channel number.

Power Switch

Turn ON/OFF the power.

LCD

Displays measurement

waveform and transmitter

information.

EVENT Button

Activates the function

assigned on the receiving

monitor.

Electrode Position Label

Indicates standard ECG

electrode position.

Battery Compartment Lid

This is the lid for the battery

compartment.

Make sure to close it when the

transmitter is operated.

2. Names of Parts and Their Functions

Refer to “Safety

Precautions” in this

manual’s preface.

3. Preparation

1) Installing the Battery

The LX-7120(G) functions with one (1) "AA" size (“LR06” size) alkaline battery.

With new battery, the LX-7120(G) is capable of approximately 3 days

continuous operation.

WARNING

 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 battery.

 Do not short out the (+) and (-) terminals. It may result in exothermic

heat and fire, the leakage from the battery may damage the equipment,

or an explosion from the battery may occur.

 Install the battery with the correct polarity.

 Do not use a disassembled or a damaged battery due to drop or shock.

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

explosion from the battery may occur.

 Remove the exhausted battery immediately. The leakage from the

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

may occur.

 If the transmitter is not in use for a long period of time, remove the

battery and store the equipment in an appropriate place. If the battery is

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

battery may damage the equipment or an explosion from the battery

may occur.

CAUTION

 Use only alkaline battery. Other battery 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 battery with wet hands.

 In case of storing the used or unused battery, make sure that the

terminals are not touching other battery or metal parts.

3. Preparation

Lift the lock lever to open the battery

compartment lid as shown in the left picture.

Install new battery 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).

CAUTION

 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-7120(G) after closing the battery

compartment lid.

3. Preparation

2) Operating Power Switch

Turning the power switch to “ON”

Rotate the power switch to the left until it clicks.

LCD screen turns ON and measurement starts.

Regarding the LCD screen, refer to page 17 (6. Measurement).

The screen automatically turns itself OFF after a minute.

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.

Batter

mbol Remainin

Batter

Level

Full

Getting low but still available

Nearly empty;

Replace the battery

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

Turning the power switch to “OFF”

Rotate the power switch to the right until it clicks.

3. Preparation

Blank Page

4. ECG Monitoring

■ Connecting the ECG Lead Cable and Electrodes

The optional ECG lead cables for LX-7120(G) are as follows.

ECG Lead Cables

AHA color code:

Item No. Applicable Lead Remark

CMT-01HTH-0.8DA Limb Lead (1CH) 3-electrode Hook Type

(White, Black, Red)

CMT-02HTH-0.8DA Limb Lead (2CH) 4-electrode Hook Type

(

White, Black, Red, Green

)

CMT-03HTH-0.8DA Limb Lead (1CH)

+Chest (1CH)

5-electrode Hook Type

(White, Black, Red, Green, Brown)

CMT-01FTH-0.8DA Limb Lead (1CH) 3-electrode Clip Type

(

White, Black, Red

)

CMT-02FTH-0.8DA Limb Lead (2CH) 4-electrode Clip Type

(

White, Black, Red, Green

)

CMT-03FTH-0.8DA Limb Lead (1CH)

+Chest (1CH)

5-electrode Clip Type

(White, Black, Red, Green, Brown)

WARNING

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.

4. ECG Monitoring

The relations between the attached electrode positions and lead method are

as follows. Attach the electrodes to monitor proper waveform.

For 3-electrode lead cable

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

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 “7. Operation ■Changing Setup ●ECG Display Screen (1)

<<Switchin

Lead>>” in pa

e 25.

For 4-electrode lead cable

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

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.

Black

(

)

Red

(LL)

White

(

)

Black

(LA)

White

（RA）

Red

(LL)

Green

(

)

4. ECG Monitoring

For 5-electrode (Chest) lead cable

For AHA color code electrode position (No. CMT-03HTH-0.8DA, CMT-03FTH-

0.8DA)

Standard Limb lead

and Chest lead

One limb lead and one chest lead (Brown) measurements are available.

Standard Limb leads can be selected from lead I, lead II, or lead III

under the setting of the equipment.

The chest lead waveform is measured from the chest lead (Brown)

positioned on the chest.

Refer to “7. Operation ■Changing Setup ●ECG Display Screen (1)

<<Switchin

Lead>>” in pa

e 25.

Black

(LA)

White

（RA）

Red

(LL)

Green

(

)

Brown

(V)

4. ECG Monitoring

■ Attaching the Electrodes

CAUTION

 Always use the same type of electrodes. If different types of

electrodes are used at the same time, the difference between

the polarization potential from each electrode may interfere with

monitoring.

 Do not reuse the disposable electrodes. It is intended for single

patent use only.

Clean the electrode sites with alcohol wipes

or other skin preparation. If necessary, shave

the electrode sites to remove excessive hair.

Peel off the disposable electrode.

Pay attention not to touch the electrode gel.

ttach the lead cable end to the electrode

(convex part).

Turn right and left to verify that it is securely

attached.

4. ECG Monitoring

■ Connecting the ECG Lead Cable to the LX-7120(G)

Insert the ECG lead cable firmly into the ECG/RESP input connector matching

the transmitter’s connector guide and the direction of the notched part on the

connector.

ECG Lead cable

4. ECG Monitoring

CAUTION

 There are some cases when 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.

 Time constant of this equipment is shorter than Fukuda Denshi

monitors (direct ECG connection). Therefore, there is a difference in the

ST measurement value between them. Pay attention to the difference

when monitoring a patient from a transmitter or a monitor.

 When an electrode is attached on the same location for a long time,

some patients may develop skin irritation. Check the patient’s skin

condition periodically and change the electrode position as required.

 The indication for continuous use of an electrode is about one day.

 Replace the electrode if the skin contact gets loosen due to perspiring,

etc.

 Make sure to use new disposable electrodes. Otherwise, the waveform

quality may become poor and it may fail to perform correct monitoring.

 When “Check Electrode” message is displayed on the screen of the

receiving monitor or the LCD of this equipment, check the condition of

the electrodes and ECG lead cable to resolve the cause.

 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.

 It may not perform a correct measurement due to the attached position

of the electrodes. Attach the electrodes on the patient referring to page

10 and 11 and make sure that the correct waveform is measured on the

LCD.

5. Respiration Monitoring

Follow the preparation of “4.ECG Monitoring” to allow the respiration

monitoring.

This respiration monitoring is performed with impedance method.

The ECG electrodes are also used for detecting the respiration. Each lead

cable specifies the electrodes to detect the respiration. For 3-electrode and 5-

electrode (chest) lead cable, the electrodes to detect the respiration are fixed

as follows. Even if lead method is switched, they are no changes.

Lead Cable Color of Electrode

3-electrode White

(

)

and Red

(

)

4-electrode White

(

)

and Red

(

)

5-electrode

(

Chest

)

White

(

)

and Red

(

)

WARNING

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, please 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.

[October 14, 1998 (Letter: www .fda.gov/cdrh/safety.html) - FDA]

CAUTION

 Even if the electrodes are attached on the proper positions for ECG

monitoring, it may not be always the proper ones for respiration

monitoring as well.

 When a defibrillator is used during respiration monitoring, a large offset

voltage will be placed on the ECG electrodes, which may cause

interruption of monitoring for a few seconds.

5. Respiration Monitoring

Blank Page

6. Measurement

Turn ON the power and the measurement starts.

■ Starting Screen

When the power is turned ON, the channel number configured on the LX-

7120(G) is displayed at the top of the LCD.

Make sure whether the channel number on the

LCD matches the channel number indicated on

the label of the LX-7120(G) and the channel

number configured on the receiving monitor.

This screen automatically moves onto the next

waveform displa

screen.

■ Waveform Display Screen

ECG waveform (1CH when using 3-electrode lead cable, 2CH when using

other lead cable), heart rate, pacemaker marker, respirogram, respiration rate,

remaining battery level, and various messages are displayed.

CAUTION

 The LX-7120(G) does not have a diagnostic function. Check the

diagnostic function on the receiving monitor.

 The LX-7120(G) does not have an alarm function. Check the alarm

function on the receiving monitor.

 The ECG waveform size and sweep speed settings displayed on the

LCD of the LX-7120(G) do not interface with the ones displayed on the

screen of the receiving monitor.

 The heart rate and respiration rate displayed on the LCD of the LX-

7120(G) may be different from the ones displayed on the receiving

monitor. Because the algorithm of the ECG and respiration rate is

different.

■ Battery Level Check

Check the battery level on the waveform display screen.

Battery

Symbol Remaining Battery Level

Full

Getting low but still available

Nearly empty

Replace the battery.

A message that prompts the

battery check appears on the

screen of the receiving

monitor.

6. Measurement

■ Waveform Display

●ECG Display Screen (1)

ECG1 waveform, heart rate, pacemaker marker, remaining battery level, and

electrode check message are displayed.

The LCD display will automatically turn itself OFF after 60 seconds if no

operation is done. To restart the LCD display, refer to page 29.

When the LCD display is active, press the ▽ button to move onto the next

waveform display screen.

【Descriptions of the Screen】

The descriptions of contents displayed on the LCD are as follows.

Indicates ECG 1.

Indicates the scale of the displayed

ECG.

One scale corresponds to 1mV.

In the left illustration, it can display

ECG waveform between -1mV and

+1mV.

Displays the ECG waveform.

Displays the heart rate.

♥ is displayed in synchronization with

the heart rate.

6. Measurement

Displays the detection marker when

the pacemaker pulse is detected.

Indicates the measuring lead.

Indicates the ECG waveform size

displayed on the LCD.

CAUTION

 The ECG waveform size setting displayed on the LCD does not interact

with the one displayed on the screen of the receiving monitor, because

the LX-7120(G) cannot transmit the setting information of the waveform

size to the receiving monitor. If the ECG waveform size displayed on the

screen of the receiving monitor is changed, follow the instruction in the

operation manual of the receiving monitor.

 In case of the outside of the heart rate range (12 to 300bpm), 0bpm will

be displayed if 11bpm and below is measured and 300bpm will be

displayed If 300bpm and above is measured.

Indicates the remaining battery level.

For details of the battery level, refer to

page 17.

Displays the electrode check

“ELECTRODE?” message appears

when the ECG electrode is detached.

6. Measurement

●ECG Display Screen (2)

ECG2 waveform, heart rate, pacemaker marker, remaining battery level, and

electrode check message are displayed.

NOTE

If a 3-electrode lead cable is used, this screen will not appear.

The LCD display will automatically turn itself OFF after 60 seconds if no

operation is done. To restart the LCD display, refer to page 29.

When the LCD display is active, press the ▽ button to move onto the next

waveform display screen.

【Descriptions of the Screen】

The descriptions of contents displayed on the LCD are as follows.

Indicates ECG 2.

Indicates the scale of the displayed

ECG.

One scale corresponds to 1mV.

In the left illustration, it can display ECG

waveform between -1mV and +1mV.

Displays the ECG waveform.

Displays the heart rate.

♥ is displayed in synchronization with

the heart rate.

6. Measurement

Displays the detection marker when the

pacemaker pulse is detected.

Indicates the measuring lead.

Indicates the ECG waveform size

displayed on the LCD.

CAUTION

 The ECG waveform size setting displayed on the LCD of the LX-

7120(G) does not interact with the one displayed on the screen of the

receiving monitor, because the LX-7120(G) cannot transmit the setting

information of the waveform size to the receiving monitor. If the ECG

waveform size displayed on the screen of the receiving monitor is

changed, follow the instruction in the operation manual of the receiving

monitor.

 In case of the outside of the heart rate range (12 to 300bpm), 0bpm will

be displayed if 11bpm and below is measured and 300bpm will be

displayed If 300bpm and above is measured.

Indicates the remaining battery level.

For details of the battery level, refer to

page 17.

Displays the electrode check

“ELECTRODE?” message appears

when the ECG electrode is detached.

6. Measurement

●Respiration Display Screen

Respiration waveform, respiration rate, remaining battery level, and electrode

check message are displayed.

The LCD display will automatically turn itself OFF after 60 seconds if no

operation is done. To restart the LCD display, refer to page 29.

When the LCD display is active, press the ▽ button to move onto the next

waveform display screen.

【Descriptions of the Screen】

The descriptions of contents displayed on the LCD are as follows.

Indicates the respiration waveform

display screen.

Indicates the scale of the displayed

respiration waveform.

One scale corresponds to 1Ω.

In the left illustration, it can display

the change of respiration waveform

between -1Ω and +1Ω.

Displays the respiration waveform.

Displays the respiration rate.

Indicates the respiration waveform

size displayed on the LCD.

6. Measurement

CAUTION

 The respiration waveform size setting displayed on the LCD does not

interact with the one displayed on the screen of the receiving monitor,

because the LX-7120(G) cannot transmit the setting information of the

waveform size to the receiving monitor. If the respiration waveform size

displayed on the screen of the receiving monitor is changed, follow the

instruction in the operation manual of the receiving monitor.

 In case of the outside of the respiration rate range (9 to 150Bpm), 0Bpm

will be displayed if 8Bpm and below is measured and 150Bpm will be

displayed If 150Bpm and above is measured.

Indicates the remaining battery level.

For details of the battery level, refer to

page 17.

Displays the electrode check

“ELECTRODE?” message appears

when the ECG electrode is detached.

6. Measurement

Blank Page

7. Operation

■ Changing Setup

●ECG Display Screen (1)

In the ECG display screen (1), the ECG waveform size and lead displayed on

the LCD of the LX-7120(G) can be changed.

【Setting Method】

How to enter the setup mode:

Press and hold the Enter button for 2 seconds in the ECG display screen (1).

<<Switching Lead>>

Lead of ECG 1 can be switched when 3-electrode lead cable or 5-electrode

(Chest) lead cable is used.

Select an appropriate lead by checking the ECG waveform on the LCD.

The lead indication of ECG 1 is

highlighted.

Pressing the Enter button will

sequentially change the lead of

ECG 1.

Lead I  II  III  I

<<Changing ECG1 Waveform Size on LCD>>

Press the ▽ button to highlight

the size indication of ECG 1.

Pressing the Enter button will

sequentially change the size of

ECG 1.

Size ×1  ×1/2  ×1

When changing the size of the

ECG waveform on the LCD, the

ECG scale will also change.

In the left illustration, it can

display the ECG waveform

between -2mV and +2mV.

CAUTION

The ECG waveform size setting displayed on the LCD of the LX-7120(G)

does not interact with the one displayed on the screen of the receiving

monitor, because the LX-7120(G) cannot transmit the setting information of

the waveform size to the receiving monitor. If the ECG waveform size

displayed on the screen of the receiving monitor is changed, follow the

instruction in the operation manual of the receiving monitor.

7. Operation

<< Returning to ECG Display Screen (1) >>

Press the ▽ button to highlight

the Return button.

Press the Enter button to return to

the ECG display screen (1).

CAUTION

Do not operate the LX-7120(G) with the setup screen open to prevent the

settings to be changed due to an unintended operation. Make sure to press

the Return button to terminate the setup screen. The LCD display will

automatically turn itself OFF after 60 seconds if the Return button is not

pressed.

7. Operation

●ECG Display Screen (2)

In the ECG display screen (2), the ECG waveform size displayed on the LCD

of the LX-7120(G) can be changed.

【Setting Method】

How to enter the setup mode:

Press and hold the Enter button for 2 seconds in the ECG display screen (2).

<< Changing ECG2 Waveform Size on LCD >>

The size indication of ECG 2 is

highlighted.

Pressing the Enter button will

sequentially change the size of

ECG 2.

Size ×1  ×1/2  ×1

When changing the size of the

ECG waveform on the LCD, the

ECG scale will also change.

In the left illustration, it can

display ECG waveform between

-2mV and +2mV.

CAUTION

The ECG waveform size setting displayed on the LCD of the LX-7120(G)

does not interact with the one displayed on the screen of the receiving

monitor, because the LX-7120(G) cannot transmit the setting information of

the waveform size to the receiving monitor. If the ECG waveform size

displayed on the screen of the receiving monitor is changed, follow the

instruction in the operation manual of the receiving monitor.

<< Returning to ECG display screen (2) >>

Press the ▽ button to highlight

the Return button.

Press the Enter button to return to

the ECG display screen (2).

7. Operation

●Respiration Display Screen

In the respiration display screen, the respiration waveform size displayed on

the LCD of the LX-7120(G) can be changed.

【Setting Method】

How to enter the setup mode:

Press and hold the Enter button for 2 seconds in the respiration display screen.

<< Changing Respiration Waveform Size on LCD>>>

The size indication of the

respiration is highlighted.

Pressing the Enter button will

sequentially change the size of

respiration.

Size ×1  ×1/2  ×1

When changing the size of the

respiration waveform on the LCD,

the respiration scale will also

change.

In the left illustration, it can

display the respiration waveform

until 4Ω of chan

CAUTION

The respiration waveform size setting displayed on the LCD of the LX-

7120(G) does not interact with the one displayed on the screen of the

receiving monitor, because the LX-7120(G) cannot transmit the setting

information of the waveform size to the receiving monitor. If the respiration

waveform size displayed on the screen of the receiving monitor is changed,

follow the instruction in the operation manual of the receiving monitor.

<< Returning to Respiration Display Screen>>

Press the ▽ button to highlight

the Return button.

Press the Enter button to return to

the respiration display screen.

7. Operation

CAUTION

Do not operate the LX-7120(G) with the setup screen open to prevent the

settings to be changed due to an unintended operation. Make sure to press

the Return button to terminate the setup screen. The LCD display will

automatically turn itself OFF after 60 seconds if the Return button is not

pressed.

■ Restarting the LCD display

The LCD display will automatically turn itself OFF after 60 seconds if no

operation is done.

Press the Enter button or press and hold the ▽ button to restart the LCD

display.

The starting screen with telemetry channel number appears, and then the

waveform display screen appears.

■ Pressing the EVENT button

Press and hold the EVENT button for 2 seconds to activate the function

assigned on the receiving monitor. The following message appears on the

LCD while the “EVENT” is transmitted.

After the transmission is completed, the starting screen with the telemetry

channel number appears, and then the waveform display screen appears.

“EVENT” operation is available as a remote recording.

For details of the receiving monitor operation and settings related to the

“EVENT” function, refer to the operation manual of the receiving monitor.

7. Operation

Blank Page

8. Other Setting Items

The following settings are available for the LX-7120(G) depending on the use

and condition of the patient. For details of the settings, contact our service

representative.

Items Selection Default Backup

Time Constant 0.4 sec., 0.1 sec. 0.4 sec. Yes

Detection Sensitivity of

Pacemaker Pulse Low, Mid, High Mid Yes

Respiration Detection

Signal ON, OFF ON Yes

LCD Contrast 8 steps 8 Yes

Transmitter Channel

One from the

following channels.

9501 to 9539

9600 to 9639

9700 to 9739

9800 to 9839

9900 to 9938

2701 to 2739

2800 to 2839

2900 to 2918

2921 to 2939

3000 to 3039

3100 to 3118

9501 Yes

Group ID One from 00 to 63 00 Yes

8. Other Setting Items

■ Changing the Time Constant

The default setting of the time constant is “0.4 seconds”.

If a stable monitoring is difficult with excessive change in the baseline due to

excessive body motion of the patient or an interference noise, such as AC

frequency, by changing the time constant to “0.1 second” the monitoring may

become relatively stable.

For details of the setting change, contact your local Fukuda Denshi service

representative.

CAUTION

 When changing the time constant to “0.1 seconds”, the lower frequency

characteristic becomes 1.6Hz ±25%. This setup does not meet IEC

60601-2-27 standard. It may lead to a change in the ECG waveform and

ST measurement value may be especially affected. Fukuda Denshi

recommends “0.4 seconds” setting in normal use.

 The LCD screen in normal use does not indicate the selection of time

constant. Make sure to take measures, such as marking on the LX-

7120(G), to distinguish whether the selection of time constant is

changed.

8. Other Setting Items

■ Changing the Detection Sensitivity of the Pacemaker Pulse

The default setting of pacemaker pulse detection sensitivity is “Mid”.

The “Mid” setting can detect and reject the following pacemaker pulse

specified in ANSI/AAMI EC13 standard.

Detection/ Rejection of Pacemaker Pulse:

a) Pacemaker Pulse without Over/Undershoot:

Capable to reject pulses of pulse width 0.1 to 2ms,

amplitude ±2 to ±700mV

b) Pacemaker Pulse with Over/Undershoot:

Rejection is not possible.

Fukuda Denshi recommends the “Mid” setting in normal use.

There may be some cases when the pacemaker pulse cannot be detected

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

type (unipolar, bipolar). In this case, change the lead or the position of the

electrodes to be able to detect the pacemaker pulse.

Nonetheless, if the detection is still undetectable, change the setting to “High”

in order to increase the detection sensitivity. So that smaller pacemaker pulse

can be detected. However, the “High” setting may lead to erroneous detection

due to interference noise, such as AC frequency.

If erroneous detections occur due to interference noise, such as AC frequency,

turn OFF the setting of the pacemaker pulse detection in the receiving monitor.

If erroneous detections occur due to interference noise, such as AC frequency,

while monitoring a patient with a pacemaker, and the setting of the pacemaker

pulse detection cannot be turned OFF, replace the electrodes or change the

lead to remove the interference noise, such as AC frequency.

Nonetheless, if erroneous detections still occur, change the setting to “Low” in

order to decrease the detection sensitivity. It makes the LX-7120(G) less likely

to be interfered by the noise, such as AC frequency.

The “Low” setting decreases the detection sensitivity. Therefore, it cannot

detect the pacemaker pulse specified in ANSI/AAMI EC13 standard.

For details of the setting change, contact your local Fukuda Denshi service

representative.

CAUTION

The LCD screen in normal use does not indicate the setting status of the

pacemaker pulse detection. Make sure to take measures, such as marking

on the LX-7120(G), to distinguish whether the setting of the pacemaker

pulse detection is changed.

8. Other Setting Items

■ Changing the Respiration Detection Signal ON/OFF

The default setting of the respiration detection signal is “ON”.

The respiration waveform can be detected when the setting of the respiration

detection signal is turned “ON”.

WARNING

If the LX-7120(G) is used with minute ventilation rate-adaptive implantable

pacemaker, the respiration detection signal may cause the pacemaker to

pace at its maximum programmed rate. If such event occurs, change the

settin

to “OFF” to prevent an occurrence of erroneous pacin

rate.

For details of the setting change, contact your local Fukuda Denshi service

representative.

CAUTION

 The respiration waveform cannot be measured if the setting of the

respiration detection signal is turned “OFF”.

 Make sure to turn OFF the respiration measurement function on the

receiving monitor to prevent an erroneous detection of the respiration

alarm (on the receiving monitor side).

 The LCD screen in normal use does not indicate the setting status of the

respiration detection signal ON/OFF. Make sure to take measures, such

as marking on the LX-7120(G), to distinguish whether the setting of the

respiration detection signal ON/OFF is changed.

■ Changing the LCD Contrast

The LCD display contrast of the LX-7120(G) can be changed in 8 steps.

For details of the setting change, contact your local Fukuda Denshi service

representative.

8. Other Setting Items

Blank Page

9. Changing the Transmitter Channel and Group ID

■ Changing the Transmitter Channel

The LX-7120(G) is a transmitter of PLL synthesizer type, and its transmitter

channel can be programmed. It can be set up with an arbitrary channel among

the channels assigned by the Telemetry Laws (according to each country).

For details of the setting change, contact your local Fukuda Denshi service

representative.

WARNING

 If the transmitter channel is changed, follow the instruction by the

person in charge of the radio telemetry channel in your facility.

Mismanagement may result in a serious accident, such as interference

and mixing up patients.

 Replace promptly the new channel label if the transmitter channel has

been changed.

■ Changing the Group ID

The LX-7120(G) transmits its group ID, which it belongs to, to prevent

interference with neighboring hospital's transmitter.

The receiving monitor checks whether the incoming group ID is the same as

the programmed one that the receiving monitor has. There are 64 group codes

available. The default setting is “00”.

The transmitter group ID can be changed if there is interference with a

neighboring hospital's transmitter.

For details of the setting change, contact your local Fukuda Denshi service

representative.

CAUTION

Possible causes of interference other than radio telemetry from neighboring

hospital's transmitter, are the proximity of mobile phone, amateur radio

station, radio taxi, and illegal citizens band, which may be a cause of

interference. In such a case, the situation should be carefully observed to

find the cause of interference.

11. トラブル対策

Blank Page

10. Troubleshooting

■ List of Displayed messages

Transmitter (main unit)

Message Cause Solution

Failed to transmit

waveform and

value.

Contact your local Fukuda

Denshi service

representative.

Faulty EEPROM.

Failed to initialize

CPU.

ECG

Message Cause Solution

Electrode is off. Check the electrode

condition.

Character string

displayed, such as LA,

depends on the

detached electrode

position.

10. Troubleshooting

■ Troubleshooting

Make sure of the following. However, if there is no improvement in the

phenomenon, contact your local Fukuda Denshi service representative.

Transmitter (main unit)

Phenomenon Cause Solution

Nothing is displayed

on the LCD when the

power switch is turned

ON.

No battery or wrong

polarity

Install the battery correctly.

Battery level is

empty.

Replace the battery with a

new one.

Nothing is displayed

on the receiving

monitor screen.

The channel

number between

the transmitter and

the receiving

monitor do not

match up.

Set the same channel

number for the transmitter

and the receiving monitor.

Transmission problem. Same channel

number is already

used.

Make sure to not duplicate

channel numbers.

Follow the instruction by the

person in charge of radio

telemetry channel in your

facility and use the LX-

7120(G) with the correct

channel settin

Channel

interference

Follow the instruction by the

person in charge of radio

telemetry channel in your

facility and use the LX-

7120(G) with the correct

channel setting.

Transmitter failure Contact your local Fukuda

Denshi service

representative.

10. Troubleshooting

ECG

Phenomenon Cause Solution

“ELECTRODE?”

message is displayed.

Lead cable is off. Check the connection

between the lead cable and

the LX-7120

(

)

Check the connection

between the lead cable and

the electrode.

Faulty Lead cable. Replace the ECG cable with

a new one.

Electrode is peeling

off.

Replace the electrode with a

new one.

Polarization

potential of the

electrode is too

Replace the electrode with a

new one.

ECG waveform

contains noise

Electrode gel is dry.

Replace the electrode with a

new one.

Electrode is peeling

off.

Electric blanket is

used.

Cover the electric blanket

with a shield cover.

AC filter setting of

the receiving

monito

is OFF.

Set the AC filter up as ON.

Respiration waveform

cannot be measured.

Electrode

el is dr

. Replace the electrode with a

new one.

Electrode is peeling

off.

The positions of the

electrodes are

improper.

Attach the electrodes where

the respiration waveform can

be measured appropriatel

10. Troubleshooting

■ In Case of Dropping the LX-7120(G) into Water

In case of dropping the LX-7120(G) into water containing disinfectant, pick up

the LX-7120(G) quickly from it. Rinse it well with running water, and dry it

thoroughly with a soft cloth.

CAUTION

 Do not use a drier. The LX-7120(G) shape may change or be broken.

 When the LX-7120(G) is rinsed with running water, make sure to close

the battery compartment lid.

11. Cleaning and Disinfection

The Cleaning and disinfection of the LX-7120(G) and ECG lead cable shall be

performed as follows.

CAUTION

Do not sterilize the LX-7120(G) and ECG lead cable in any manners, such

as radioactive rays, steam, or ethylene oxide.

■ Cleaning and Disinfecting the LX-7120(G)

●Cleaning

Clean the LX-7120(G) using squeezed gauze or an absorbent cotton cloth

dampened with alcohol or a neutral cleanser.

CAUTION

 Clean the equipment frequently so stains can be removed easily.

 To prevent injury, it is recommended to wear gloves when cleaning the

equipment.

 Do not allow any chemical solution to enter the inside of LX-7120(G) or

connectors.

 The LX-7120(G) cannot be sterilized.

 Do not use organic solvents, thinner, toluene and benzene to avoid

damaging the resin case.

 Do not polish the housing with abrasive or chemical cleaner.

 Use only neutral detergent to clean the housing. Do not use chemical

cloth, scrub brush, abrasive, polishing powder, hot water, volatile solvent

and chemicals (cleanser, thinner, benzine, benzol, and synthetic

detergent for house and furniture), or sharp-edged tools. The surface

resin coating may be damaged, resulting in discoloration, scratches, and

Fukuda Denshi Co LX7120G ECG & Respiration Transmitter User Manual Short Term Confidential

Fukuda Denshi Co Ltd ECG & Respiration Transmitter Short Term Confidential

(Short-Term Confidential) User Manual

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