GE Corometrics 170 Service manual
Corometrics®170 Series
SERVICE MANUAL MANUAL P/N 2000947-004 REV. C
Corometrics® 170 Series
SERVICE MANUAL MANUAL P/N 2000947-004 REV. C
GUARANTEE
All equipment sold by GE Medical Systems Information Technologies, is fully guaranteed as to
materials and workmanship for a period of 1 year. Information Technologies reserves the right to
perform guarantee service operations in its own factory, at an authorized repair station, or in the
customer’s installation.
Our obligation under this guarantee is limited to repairing, or, at our option, replacing any
defective parts of our equipment, except fuses or batteries, without charge, if such defects occur in
normal service.
Claims for damage in shipment should be filed promptly with the transportation company. All
correspondence covering the instrument should specify the model and serial numbers.
GE Medical Systems Information Technologies
A GE Medical Systems Company
GE Medical Systems Information Technologies will make available on request such circuit
diagrams, component diagrams, component parts lists, descriptions, calibration instructions, or
other information which will assist the users or appropriately qualified technical personnel to
repair those parts of the equipment which are classified by GE Medical Systems Information
Technologies as repairable. Refer to the service manual for further information.
!
CAUTION: In the United States of America, Federal Law restricts this device to sale by or
on the order of a physician.
Corometrics and Marquette are registered trademarks of GE Medical Systems Information Technologies. GE is a registered
trademark of General Electric Company. All other product and brand names are trademarks or registered trademarks of their
respective companies. ©2002-2004 GE Medical Systems Information Technologies. All rights reserved. No part of this
manual may be reproduced without the permission of GE Medical Systems Information Technologies.
Contents
1 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Definitions of Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Monitor Contraindications, Warnings, and Precautions . . . . . . . . . . . . . . . . . . . . 1-4
Equipment Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Indications for Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Monitoring Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
About Your Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
3 Controls, Indicators, and Connectors . . . . . . . . . . . . . . . 3-1
Front Panel Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Front Panel Displays and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Front Panel Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Strip Chart Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Rear Panel Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
4 Setup Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Loading Strip Chart Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Turning the Monitor On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Revision C Corometrics 170 Series 5
2000947-004
Monitor Self-Test Routines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Customizing the Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Quick Reference Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Flasher Software Utility Upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
5 Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Main Board Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17
FECG/IUP Board Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-36
6 Functional Checkout Procedure . . . . . . . . . . . . . . . . . . . 6-1
Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Monitor Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Front Panel Pushbutton Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Connecting the Simulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
FECG Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Legplate Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12
Ultrasound Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13
Fetal Movement Detection Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16
Ultrasound Transducer Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18
Uterine Activity Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-19
Tocotransducer Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-21
Strain Gauge Transducer Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-22
Pattern Memory Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-23
Dual Heart Rate Test (Non-Pattern) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-24
6 Corometrics 170 Series Revision C
2000947-004
Alarm Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-28
7 Serviceable Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
General Anti-Static Handling Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
Transducer Plug Replacement Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
Nautilus Transducer Cable Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-15
Removing the Monitor Top Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-19
Tocotransducer Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-20
Nautilus Ultrasound Transducer Top Cover Replacement . . . . . . . . . . . . . . . . . 7-30
Nautilus Transducer Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-32
Testing a Repaired Transducer (TOCO or US) . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-34
Replacing the Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-35
Replacing the FECG/IUP Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-36
Replacing the Membrane Switch Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-37
Replacing a Front Panel Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-40
Servicing the Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-41
Boot ROM Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-49
8 Peripheral Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
Remote Marks Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
Telemetry Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
RS-232 Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
9 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-2
Preventative Maintenance Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-5
Revision C Corometrics 170 Series 7
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10 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1
General Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2
Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3
Strip Chart Recorder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4
11 Parts Lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1
2000268-188, Model 171 Final Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2
2000268-189, Model 172 Final Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-5
2001972-037, Model 173 Final Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-8
2001972-038, Model 174 Final Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-11
2264AAX, Button-Style Nautilus Tocotranducer Assembly Parts List . . . . . . . 11-14
5700GAX, Button-Style Nautilus Ultrasound Transducer Assembly Parts List 11-15
5700KAX, Loop-Style Nautilus Ultrasound Transducer Assembly Parts List . 11-16
2264DAX, Loop-Style Nautilus Tocotransducer Assembly Parts List (5-ft cord) 11-17
1509AAO/BAO, Qwik Connect Plus Legplate Assembly Parts List . . . . . . . . . 11-18
Block Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-19
8 Corometrics 170 Series Revision C
2000947-004
Chapter 1
!
Safety 1
The information presented in this section is important for the safety of both the
patient and operator and also serves to enhance equipment reliability. This chapter
describes how the terms Danger, Warning, Caution, Important, and Note are used
throughout the manual. In addition, standard equipment symbols are defined.
This section includes the following important information:
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Definitions of Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Monitor Contraindications, Warnings, and Precautions . . . . . . . . . . 1-4
Equipment Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Revision C 170 Series Monitor 1-1
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Safety: General Information
General Information
General Use
If the monitor is cold to the touch or below ambient temperature, allow it to stabilize
before use.
To ensure patient safety, use only parts and accessories manufactured or
recommended by GE Medical Systems Information Technologies. Parts and
accessories used shall meet the requirements of EN60601.1.1.
Disposable devices are intended for single use only. They should not be reused.
Periodically, and whenever the integrity of the monitor is in doubt, test all functions.
Refer to the “Maternal/Fetal Monitoring Operator’s Manual” for information
concerning the limitations of internal and external fetal heart rate monitoring
techniques.
Responsibility of the Manufacturer
GE is responsible for the effects on safety, reliability, and performance if:
assembly operations, extensions, readjustments, modifications, or repairs are
carried out by persons authorized by GE;
the electrical installation of the relevant room complies with the requirements of
appropriate regulations; and
the monitor is used in accordance with the instructions of use.
Responsibility of the User
This device is intended for use by clinical professionals who are expected to know
the medical procedures, practices, and terminology required to monitor obstetrical
patients. This manual documents all possible parameters available in the 170 Series
of monitors. It is the responsibility of each hospital to ensure that the Labor and
Delivery staff is trained in all aspects of the selected model.
The 170 Series Monitor is designed to assist the perinatal staff by providing
information regarding the clinical status of the fetus during labor. The monitor does
not replace observation and evaluation of the mother and fetus at regular intervals,
by a qualified care provider, who will make diagnoses and decide on treatments or
interventions. Visual assessment of the monitor display and strip chart must be
combined with knowledge of patient history and risk factors to properly care for the
mother and fetus.
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Safety: Definitions of Terminology
Definitions of Terminology
Six types of special notices are used throughout this manual. They are: Danger,
Warning, Caution, Contraindication, Important, and Note. The warnings and
cautions in this Safety section relate to the equipment in general and apply to all
aspects of the monitor. Be sure to read the other chapters because there are
additional warnings and cautions which relate to specific features of the monitor.
When grouped, warnings and cautions are listed alphabetically and do not imply any
order of importance.
Danger
Warning
Table 1-1. Definitions of Terminology
A DANGER notice indicates an imminently
hazardous situation which, if not avoided, will result
in death or serious injury.
A WARNING indicates a potentially hazardous
situation which, if not avoided, could result in death
or serious injury.
Caution
Contraindication
Important
Note
A CAUTION indicates a potentially hazardous
situation which, if not avoided, may result in minor
or moderate injury. Cautions are also used to
avoid damage to equipment.
A CONTRAINDICATION describes any special
symptom or circumstance that renders the use of a
remedy or the carrying out of a procedure
inadvisable, usually because of a risk.
An IMPORTANT notice indicates an emphasized
note. It is something you should be particularly
aware of; something not readily apparent.
A NOTE indicates a particular point of information;
something on which to focus your attention.
Revision C 170 Series Monitor 1-3
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Safety: Monitor Contraindications, Warnings, and Precautions
Monitor Contraindications, Warnings, and Precautions
Warnings
WARNINGS
ACCIDENTAL SPILLS—In the event that fluids are accidentally
spilled on the monitor, take the monitor out of operation and
inspect for damage.
APPLICATION—This monitor is not designed for direct cardiac
connection.
CONDUCTIVE CONNECTIONS—Avoid making any
conductive connections to applied parts (patient connection)
which are likely to degrade safety.
CONDUCTIVE PARTS—Ensure that the conductive parts of the
lead electrodes and associated connectors do not contact other
conductive parts including earth.
DEFIBRILLATION—During defibrillation, all personnel must
avoid contact with the patient and monitor to avoid a dangerous
shock hazard. In addition, proper placement of the paddles in
relation to the electrodes is required to minimize harm to the
patient.
ELECTRICAL SHOCK—To reduce the risk of electrical shock,
do not remove monitor cover. Refer servicing to qualified
personnel.
ELECTROMAGNETIC INTERFERENCE—Be aware that
strong electromagnetic fields may interfere with monitor
operation. Interference prevents the clear reception of signals by
the monitor. If the hospital is close to a strong transmitter such as
TV, AM or FM radio, police or fire stations, a HAM radio
operator, an airport, or cellular phone, their signals could be
picked up as signals by the monitor. If you feel interference is
affecting the monitor, contact your Service Representative to
check the monitor in your environment. Refer to page 1-8 for
additional information.
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Safety: Monitor Contraindications, Warnings, and Precautions
WARNINGS
ELECTROSURGERY—The monitor is not designed for use with
high-frequency surgical devices. In addition, measurements may
be affected in the presence of strong electromagnetic sources such
as electrosurgery equipment.
EXPLOSION HAZARD—Do not use this equipment in the
presence of flammable anesthetics or inside an oxygen tent.
GROUNDING—Do not defeat the three-wire grounding feature
of the power cord by means of adaptors, plug modifications, or
other methods. A dangerous shock hazard to both patient and
operator may result.
INSTRUCTIONS—For continued and safe use of this equipment,
it is necessary to follow all listed instructions. However, the
instructions provided in this manual in no way supersede
established medical procedures concerning patient care. The
monitor does not replace observation and evaluation of the
patient, at regular intervals, by a qualified care provider who will
make diagnoses and decide on treatments and interventions.
INTERFACING OTHER EQUIPMENT—Monitoring equipment
must be interfaced with other types of medical equipment by
qualified biomedical engineering personnel. Be certain to consult
manufacturers’ specifications to maintain safe operation.
LEAKAGE CURRENT TEST—The interconnection of auxiliary
equipment with this device may increase the total leakage current.
When interfacing with other equipment, a test for leakage current
must be performed by qualified biomedical engineering personnel
before using with patients. Serious injury or death could result if
the leakage current exceeds applicable standards. The use of
accessory equipment not complying with the equivalent safety
requirements of this equipment may lead to a reduced level of
safety of the resulting system. Consideration relating to the
choice shall include: use of the accessory in the patient vicinity;
and evidence that the safety certification of the accessory has been
performed in accordance with the appropriate EN60601.1 and/or
EN60601.1.1 harmonized national standard.
Revision C 170 Series Monitor 1-5
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Safety: Monitor Contraindications, Warnings, and Precautions
WARNINGS
LINE ISOLATION MONITOR TRANSIENTS—Line isolation
monitor transients may resemble actual cardiac waveforms, and
thus cause incorrect heart rate determinations and alarm activation
(or inhibition).
STRANGULATION—Make sure all patient cables, leadwires,
and tubing are positioned away from the patient’s head to
minimize the risk of accidental strangulation.
WATER BIRTHS—Do not use the monitor to directly monitor
patients during water births, in whirlpool or submersion water
baths, during showers, or in any other situation where the mother
is immersed in water. Doing so may result in electrical shock
hazard.
1-6 170 Series Monitor Revision C
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Cautions
Safety: Monitor Contraindications, Warnings, and Precautions
CAUTIONS
ANNUAL SERVICING—For continued safety and performance
of the monitor, it is recommended that the calibration, accuracy,
and electrical safety of the monitor be verified on an annual basis
by an GE Service Representative.
DAILY TESTING—It is essential that the monitor and
accessories be inspected every day. It is recommended practice to
initiate the monitor’s self-test feature at the beginning of each
monitoring session; follow the instructions in “Chapter 4, Setup
Procedures”.
ENVIRONMENT—The performance of the monitor has not been
tested in certain areas, such as x-ray and imaging suites. The
monitor is not recommended for use in these environments.
PERFORMANCE—Report all problems experienced with the
monitor. If the monitor is not working properly, contact your
Service Representative for service. The monitor should not be
used if it is not working properly.
PINCHING—Keep fingers clear of the paper roller because the
roller could pinch your fingers.
TRAPPING—Keep hands, hair, jewelry, and loose clothing away
from the paper roller because the roller could trap these items.
TRIPPING—Arrange monitoring equipment so that cords and
cables do not present a tripping hazard.
Revision C 170 Series Monitor 1-7
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Safety: Monitor Contraindications, Warnings, and Precautions
Electromagnetic Interference
This device has been tested and found to comply with the limits for medical devices
to the IEC 601-1-2:1993, EN60601-1-2:1994, Medical Device Directive 93/42/EEC.
These limits are designed to provide reasonable protection against harmful
interference in a typical medical installation.
However, because of the proliferation of radio-frequency transmitting equipment
and other sources of electrical noise in the health-care and home environments (for
example, cellular phones, mobile two-way radios, electrical appliances), it is
possible that high levels of such interference due to close proximity or strength of a
source, may result in disruption of performance of this device.
This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with these instructions, may cause harmful
interference with other devices in the vicinity. Disruption or interference may be
evidenced by erratic readings, cessation of operation, or incorrect functioning. If this
occurs, the site of use should be surveyed to determine the source of this disruption,
and actions taken to eliminate the source.
The user is encouraged to try to correct the interference by one or more of the
following measures:
Turn equipment in the vicinity off and on to isolate the offending equipment.
Reorient or relocate the other receiving device.
Increase the separation between the interfering equipment and this equipment.
If assistance is required, contact your GE Service Representative.
1-8 170 Series Monitor Revision C
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Equipment Symbols
The following is a list of symbols used on products manufactured by GE. Some
symbols may not appear on your unit.
Safety: Equipment Symbols
Table 1-2. Equipment Symbols
!
ATTENTION: Consult accompanying documents.
TYPE B EQUIPMENT. Type B equipment is
suitable for intentional external and internal
application to the patient, excluding direct cardiac
application.
TYPE BF EQUIPMENT.
suitable for intentional external and internal
application to the patient, excluding direct cardiac
application. Type BF equipment has an F-type
applied part.
TYPE CF EQUIPMENT. Type CF equipment is
suitable for intentional external and internal
application to the patient, including direct cardiac
application. Type CF equipment has an F-type
applied part.
ALTERNATING CURRENT (AC).
EQUIPOTENTIALITY.
ON/STANDBY: button toggles between full power
and standby.
Type BF equipment is
CAUTION
AC MAINS—The On/Standby switch does not disconnect the
monitor from AC mains power. To completely remove power, you
must disconnect the power cord from the AC wall outlet.
Revision C 170 Series Monitor 1-9
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For your notes
Safety: Equipment Symbols
1-10 170 Series Monitor Revision C
2000947-004
Chapter 2
Introduction 2
This section lists the indications for use for monitors in the 170 Series as well as
provides an explanation of the different patient monitoring modalities.
This section summarizes the clinical applications of monitors in the 170 Series:
Indications for Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Monitoring Methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
About Your Monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Revision C 170 Series Monitor 2-1
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Indications for Use
Models 171 and 172
Models 171 and 172 Fetal Monitors are indicated for use in the monitoring of the
fetus during the antepartum period as well as throughout labor and delivery. Each
monitor also has an optional monitoring mode to detect fetal body movements.
Models 173 and 174
Models 173 and 174 Fetal Monitors are indicated for use in the monitoring of the
fetus throughout labor and delivery. Each monitor also has an optional monitoring
mode to detect fetal body movements.
Introduction: Indications for Use
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Introduction: Monitoring Methods
Monitoring Methods
The following is a summary of all the clinical monitoring methods found in the 170
Series.
Fetal Heart Rate
External Method, Pulsed Doppler Ultrasound
Ultrasound monitoring is available on all 170 Series Monitors. Models 171 and 173
provide a single ultrasound channel, while Models 172 and 174 provide two
ultrasound channels.
Fetal heart rate can be measured externally using pulsed Doppler Ultrasound. A
transducer placed on the mother’s abdomen is used to direct an ultrasonic beam
toward the fetal heart and to sense Doppler shifted echoes created by moving cardiac
structures. A patented autocorrelation process is used to determine the timing of
successive cardiac cycles. The resulting fetal heart rate (FHR) pattern is recorded on
the strip chart paper and the FHR appears on the digital display.
Internal Method, Direct Fetal Electrocardiogram (FECG)
FECG is available on Models 173 and 174 only. The Model 173 provides a
dedicated FECG connector. The Model 174 provides a combi-connector which can
be used for either FECG or US.
FECG signals are obtained via a spiral electrode attached to the fetal presenting part.
FHR is computed on a beat-to-beat basis using the R-to-R time interval of the QRS
complexes. The instantaneous FHR pattern is printed on the strip chart paper and
the FHR appears on the digital display.
Maternal Uterine Activity
External Method, Tocotransducer (TOCO)
Maternal uterine activity is measured externally using a tocotransducer (toco).
Relative pressure within the uterus is measured using a tocotransducer attached to
the mother’s abdomen in the area of the uterine fundus. The readings are plotted on
the strip chart paper in a relative scale from 0 to 100 as well as shown on the digital
display. All 170 Series Monitors provide external uterine activity monitoring.
Internal Method, Intrauterine Pressure Catheter and Strain Gauge (IUP)
IUP is available on Models 173 and 174 only.
Intrauterine pressure is measured using a transcervical catheter. The pressure trend
is plotted over the range of 0 to 100 mmHg and the readings appear on the digital
display.
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Features
Introduction: Features
The 170 Series is a family of fetal monitors offering various combinations of
modalities to suit your institution’s needs. Each monitor boasts the following
qualities:
The strip chart recorder is a quiet, easy-to-load, high resolution thermal array
printer. The recorder prints continuous trends and alphanumeric data on one
strip chart.
Automatic mode selection is provided simply by inserting the appropriate
transducer plug into the front panel receptacle.
Wide beam ultrasound transducer provides an advanced level of system
performance.
Transducer connectors are easy-to-use, color-coded, and durable.
Frequently-used functions are controlled by front panel buttons—including
audio volume, uterine activity reference, alarm silence, event mark, paper
advance, and user setup controls.
The ultrasound mode provides clean accurate traces with few “dropouts”
because of a patented autocorrelation processing.
Fetal heart rate alarm limits are user-defined, with pre-set defaults.
Alarm silencing is controlled by a front panel pushbutton—colored for easy
recognition.
Fetal heart rate alarm conditions have both audible and visual indications. The
audible indicator can be silenced on an alarm-by-alarm basis.
Two RS-232C ports provide interfacing to external devices.
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About Your Monitor
This manual describes all monitors in the 170 Series; therefore some sections may
not apply to your model monitor. Refer to Table 2-1.
Model 171
The Model 171 Antepartum Fetal Monitor provides singleton ultrasound and
external uterine activity monitoring.
Model 172
The Model 172 Antepartum Fetal Monitor provides dual ultrasound and external
uterine activity monitoring.
Model 173
The Model 173 Intrapartum Monitor provides dual heart rate monitoring using
FECG and ultrasound. The monitor also provides external uterine activity
monitoring using a tocotransducer or internal monitoring using an intrauterine
pressure catheter (IUPC).
Introduction: About Your Monitor
Model 174
The Model 174 Intrapartum Monitor provides dual heart rate monitoring using
FECG/ultrasound or dual ultrasound. The monitor also provides external uterine
activity monitoring using a tocotransducer or internal monitoring using an IUPC.
Table 2-1. Summary of Features
Feature 171 172 173 174
External uterine activity (TOCO) 9999
Internal uterine activity (IUPC) 99
Ultrasound
Dual ultrasound 99
FECG
Fetal heart rate alarms 9999
Fetal movement detection (optional) 9999
Heartbeat coincidence 999
Fetal heart rate offset 999
a
a
a
The Model 174 has a combi-connector for the primary FHR that can be used for either US or FECG.
9999
99
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For your notes
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Chapter 3
Controls, Indicators, and Connectors
This section describes all possible controls, indicators, and connectors in the 170
Series.
This section contains the following information:
Front Panel Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Front Panel Displays and Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Front Panel Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Strip Chart Recorder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Rear Panel Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14
3
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Controls, Indicators, and Connectors: Front Panel Controls
Front Panel Controls
Figure 3-1. Front Panel Controls (Model 172 shown)
Table 3-1. Front Panel Controls
Symbol Name
Power
Record
Paper Advance
Mark/Offset
Setup
Volume
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Controls, Indicators, and Connectors: Front Panel Controls
Table 3-1. Front Panel Controls
Power Button and Indicator
Pressing the blue Power button turns the monitor on and illuminates the green
indicator to the left of the button. Pressing the button again puts the monitor in
standby and extinguishes the indicator.
Record Button and Indicator
Pressing the Record pushbutton activates the recorder, provided paper is installed;
the amber indicator illuminates to the left of the button. Pressing the button again
turns the recorder off and extinguishes the indicator.
UA Reference
Alarm Silence
Paper Advance Button
Pressing the Paper Advance button causes the recorder to advance chart paper at a
rate of 40 cm/min for as long as the button is pressed. If the recorder is on, twenty
seconds after the button is released, the recorder prints the time, date, active trends
legends, and chart speed.
Mark/Offset Button
The Mark/Offset button is a multifunction button:
Mark
Briefly pressing the button prints an event mark on the bottom two lines of the
heart rate grid.
Offset (Models 172, 173, and 174 Only)
When the heart rate offset mode is enabled, pressing and holding the Mark/Offset
button for at least two seconds shifts the secondary FHR trend +20 BPM for
visibility purposes. You will hear a “beep” for confirmation. Refer to the “170
Series Operator’s Manual” for more information.
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Controls, Indicators, and Connectors: Front Panel Controls
Setup Button
Volume Buttons
Model 171
Models 172, 173, and 174
Pressing and holding this button while the monitor is on enters a user setup mode for
configuring the monitor.
Pressing and holding this button during power up enters a service setup mode.
Refer to “Chapter 4, Setup Procedures” for instructions.
The Volume buttons are used to raise ( ) and lower ( ) the volume of the audio
signals emitted by the speaker. The volume buttons are also used during setup.
This monitor has two volume buttons used to control the ultrasound audio.
These monitors have four volume buttons. The left pair controls the audio signals
for the mode shown in the primary FHR display; likewise, the right pair of buttons
controls the audio for the mode shown in the secondary FHR display.
Setup Mode
When the monitor is in setup mode (user or service), the volume buttons change: the
setting or value shown in the FHR display; or the monitor feature code shown in the
UA display. (For Models 172, 173, and 174, only the leftmost volume controls are
active during setup mode.)
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Controls, Indicators, and Connectors: Front Panel Controls
UA Reference Button
The UA Reference button is used to set the uterine activity pressure reference. This
button is also used during setup.
Setting a Baseline for External Monitoring (Tocotransducer)
Briefly pressing the UA Reference button sets the pressure baseline at a preset
default. The monitor is shipped from the factory with a default setting of 10 relative
units. Qualified service personnel can access a service screen to set the default to 5,
10, 15, 20, or 25 relative units.
Pressing this button for more than two seconds causes the uterine activity reference
value to override the default setting and cycle through all available selections: 5, 10,
15, 20, or 25 relative units, starting at the default setting—until the button is
released. While the button is held down, the strip chart tracing remains unchanged.
Once the button is released, the recorder trace takes on this new value. This value is
stored as the new baseline for the currently measured uterine activity signal.
Setting a Baseline for Internal Monitoring (IUPC)
Pressing the UA Reference button sets the pressure baseline at 0 mmHg.
Setup Mode
Alarm Silence Button
NOTE: IUPC monitoring is only available on Models 173 and 174.
When the monitor is in setup mode, the UA Reference button selects the active
display. Pressing the button alternates between the UA display (which shows a
monitor feature code) and the FHR display (which shows the setting or value for the
selected feature code). When the UA display is active, the ± sign lights. When the
FHR display is active, the heartbeat indicator lights.
This button is yellow for easy recognition. Pressing the Alarm Silence button
removes the audible indication of an individual fetal heart rate alarm.
NOTE: Silencing an alarm does not affect the visual indications.
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Controls, Indicators, and Connectors: Front Panel Displays and Indicators
Front Panel Displays and Indicators
Fetal Heart Rate Display(s) and Indicator(s)
FHR Display
A three-digit yellow numeric display indicates the fetal heart rate in beats per
minute. The value flashes during an alarm condition.
Heartbeat Indicator
A yellow heart shaped indicator flashes with each detected valid heartbeat for the
fetal heart.
Primary Versus Secondary (Models 172, 173, and 174 only)
Refer to Table 3-2 for a summary of display positions relative to connectors.
Uterine Activity Display
This green three-digit display indicates the uterine activity values.
Tocotransducer
If uterine activity is measured using a tocotransducer, the uterine activity value
displays in relative units. A plus sign flashes when the uterine activity value
exceeds the strip chart range of 100 relative units.
IUP (Models 173 and 174 Only)
If uterine activity is measured using an intrauterine pressure catheter or a strain
gauge pressure transducer, the uterine activity value displays in mmHg.
.
Table 3-2. Display/Connector Summary
Monitor Model 171 Model 172 Model 173 Model 174
Mode US TOCO US1 US2 TOCO US FECG
Display
1 2
TOCO
or
IUP
US1
or
FECG
US2
TOCO
or
IUP
Connector
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