EDAN SD3 Series User manual

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文件名称：SD3说明书_英文
文件编号：01.54.455714
版本：1.9
产品型号：SD3 LITE;SD3 PLUS;SD3 PRO;SD3
项目编码(Project Code)：2209A000
签批信息:
作者 : 周 睿 (zhourui) 2019-01-17 10:00:18
审核人 : 刘 小倩 (liuxiaoqian) 2019-01-17 13:40:37
审核人 : 余 俊煜 (yujunyu) 2019-01-17 10:33:49
批准人 : 吴 明花 (wuminghua) 2019-01-18 11:20:19
批准人 : 吴 明花 (wuminghua) 2019-01-18 11:20:19
版权©深圳市理邦精密仪器股份有限公司 (Copyright©Edan Instrument,Inc.)

I
About this Manual
P/N: 01.54.455714
Version 1.9
MPN: 01.54.455714019
Release Date: Jan. 2019
© Copyright EDAN INSTRUMENTS, INC. 2013-2019.All rights reserved.
Statement
This manual will help you understand the operation and maintenance of the product better. It
is reminded that the product shall be used strictly complying with this manual. User’s
operation failing to comply with this manual may result in malfunction or accident for which
Edan Instruments, Inc. (hereinafter called EDAN) cannot be held liable.
EDAN owns the copyrights of this manual. Without prior written consent of EDAN, any
materials contained in this manual shall not be photocopied, reproduced or translated into
other languages.
Materials protected by the copyright law, including but not limited to confidential information
such as technical information and patent information are contained in this manual, the user
shall not disclose such information to any irrelevant third party.
The user shall understand that nothing in this manual grants him, expressly or implicitly, any
right or license to use any of the intellectual properties of EDAN.
EDAN holds the rights to modify, update, and ultimately explain this manual.
Responsibility of the Manufacturer
EDAN only considers itself responsible for any effect on safety, reliability and performance
of the equipment if:
Assembly operations, extensions, re-adjustments, modifications or repairs are carried out by
persons authorized by EDAN, and
The electrical installation of the relevant room complies with national standards, and
The instrument is used in accordance with the instructions for use.
Product Information
Product Name: Ultrasonic Pocket Doppler
Model: SD3 LITE, SD3, SD3 PLUS, SD3 PRO, SD3 VASCULAR

II
Terms Used in this Manual
This guide is designed to give key concepts on safety precautions.
WARNING
A WARNING label advises against certain actions or situations that could result in personal
injury or death.
CAUTION
A CAUTION label advises against actions or situations that could damage equipment,
produce inaccurate data, or invalidate a procedure.
NOTE
A NOTE provides useful information regarding a function or a procedure.

III
Table of Contents
Chapter 1 Safety Guide............................................................................................................ 1
1.1 Intended Use/Indications for Use.................................................................................. 1
1.2 Safety Precautions......................................................................................................... 1
1.3 Symbols......................................................................................................................... 6
Chapter 2 Doppler and Accessories........................................................................................ 8
2.1 Features ......................................................................................................................... 8
2.2 Main Unit ...................................................................................................................... 9
2.2.1 Appearance.......................................................................................................... 9
2.2.2 Display Panel..................................................................................................... 10
2.2.3 Buttons .............................................................................................................. 12
2.2.4 Socket................................................................................................................ 12
2.2.5 Probe Socket...................................................................................................... 13
2.2.6 Batteries............................................................................................................. 13
2.3 Probes.......................................................................................................................... 14
2.3.1 Waterproof Obstetrical Probes.......................................................................... 14
2.3.2 Waterproof Vascular Probes ............................................................................. 14
Chapter 3 Basic Operation.................................................................................................... 15
3.1 Opening the Package and Checking............................................................................ 15
3.2 Installing/Replacing Battery........................................................................................ 15
3.3 Probe Operation........................................................................................................... 16
3.4 Switching On............................................................................................................... 17
3.5 Switching Off.............................................................................................................. 17
3.6 Replacing/Charging the Battery.................................................................................. 17
3.6.1 Battery Energy Indication ................................................................................. 17
3.6.2 Replacing Alkaline Batteries............................................................................. 18
3.6.3 Charging the NI-MH Batteries.......................................................................... 18
3.6.4 Charging the Doppler (SD3 PLUS, SD3 PRO)................................................. 19
3.6.5 Charging the Charge Stand ............................................................................... 19
Chapter 4 Examining............................................................................................................. 21
4.1 FH Examining............................................................................................................. 21
4.2 FH Sound Recording and Playing............................................................................... 22
4.3 FH Sound Recording by PC........................................................................................ 22
4.3.1 Recording Sounds ............................................................................................. 22
4.3.2 Playing Sound Files........................................................................................... 23
4.3.3 Burning CD or Sending in Email...................................................................... 23
4.3.4 Record Troubleshooting.................................................................................... 23
4.4 Vascular Examining (Optional) .................................................................................. 24
4.5 Completing Examining ............................................................................................... 26
Chapter 5 Maintenance ......................................................................................................... 27

IV
5.1 Maintenance ................................................................................................................ 27
5.2 Cleaning ...................................................................................................................... 27
5.3 Disinfection................................................................................................................. 27
5.4 Sterilization ................................................................................................................. 28
Chapter 6 Warranty and Service.......................................................................................... 29
6.1 Warranty...................................................................................................................... 29
6.2 Contact information..................................................................................................... 29
Appendix 1 Product Specifications....................................................................................... 30
Appendix 2 Ordering Information ....................................................................................... 34
Appendix 3 EMC Information.............................................................................................. 35
A3.1 Electromagnetic Emissions ...................................................................................... 35
A3.2 Electromagnetic Immunity....................................................................................... 36
A3.3 Electromagnetic Immunity....................................................................................... 37
A3.4 Recommended Separation Distances ....................................................................... 39
Appendix 4 Ultrasound Intensity and Safety....................................................................... 41
A4.1 Ultrasound in Medicine............................................................................................ 41
A4.2 Ultrasound Safety and the ALARA Principle.......................................................... 41
A4.3 Explanation of MI/TI................................................................................................ 41
A4.3.1 MI (Mechanical Index)................................................................................... 41
A4.3.2 TI (Thermal Index)......................................................................................... 42
A4.3.3 Measurement Uncertainties............................................................................ 42
A4.4 Prudent Use Statement ............................................................................................. 43
A4.5 References for Acoustic Output and Safety............................................................. 43
A4.6 Transducer Acoustic Output Parameters List........................................................... 44
A4.7 Track1 Acoustic Output Range Summary................................................................ 49
Appendix 5 Troubleshooting................................................................................................. 53
Appendix 6 Overall Sensitivity.............................................................................................. 55

SD3 Series Ultrasonic Pocket Doppler User Manual Safety Guide
- 1 -
Chapter 1 Safety Guide
CAUTION
Federal (U.S.) Law restricts this device to sale by or on the order of a physician.
NOTE:
This user manual is written to cover the maximum configuration. Therefore, your model
may or may not have some of the parameters and functions described, depending on
what you have ordered.
1.1 Intended Use/Indications for Use
The SD3 Series Ultrasonic Pocket Dopplers are intended to be used by health care professionals
including registered nurses, practical nurses, midwives, ultrasound technicians, and physician
assistants, by prescription from licensed physicians in hospitals, clinics and private offices.
The 2 MHz and 3 MHz waterproof probes are indicated for the detection of fetal heart rate from
early gestation thru delivery and as a general indication of fetal well being. Specifically, the 3
MHz probe is used for more than 9-week gestation and the 2 MHz is used for 12-week gestation.
The 4 MHz, 5 MHz and/or 8 MHz waterproof vascular probes are indicated for the detection of
blood flow in veins and arteries for assisting in the detection of peripheral vascular disease.
1.2 Safety Precautions
Safety of Ultrasound
SD3 was designed with physician and patient safety in mind. In early design phases all potential
hazards were eliminated or reduced to As Low As Reasonably Achievable (ALARA) by adhering
to good design practices and industry wide safety standards. Ultrasound procedures should be
performed with the ALARA principle in mind when delivering ultrasound energy into the body.
The following official statements from the American Institute of Ultrasound Medicine (AIUM)
are provided for your general information regarding the safe use of ultrasound.
Clinical Safety (Approved March 1997, October 1982)
Diagnostic ultrasound has been in use since the late 1950s. Given its known benefits and
recognized efficacy for medical diagnosis, including use during human pregnancy, the American
Institute of Ultrasound in Medicine herein addresses the clinical safety of such use.
There are no confirmed biological effects on patients or instrument operators caused by
exposures from present diagnostic ultrasound instruments. Although the possibility exists that
such biological effects may be identified in the future, current data indicate that the benefits to

SD3 Series Ultrasonic Pocket Doppler User Manual Safety Guide
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patients of the prudent use of diagnostic ultrasound outweigh the risks, if any that may be present.
Prudent Use (Approved May 1999)
The AIUM advocates the responsible use of diagnostic ultrasound. The AIUM strongly
discourages the non-medical use of ultrasound for psychosocial or entertainment purposes. The
use of either two-dimensional (2D) or three-dimensional (3D) ultrasound to only view the fetus,
obtain a picture of the fetus or determine the fetal gender without a medical indication is
inappropriate and contrary to responsible medical practice. Although there are no confirmed
biological effects on patients caused by exposures from present diagnostic ultrasound instruments,
the possibility exists that such biological effects may be identified in the future. Thus ultrasound
should be used in a prudent manner to provide medical benefit to the patient.
Safety in Training and Research (Approved March 1997, March 1983)
Diagnostic ultrasound has been in use since the late 1950s. There are no confirmed adverse
biological effects on patients resulting from this usage. Although no hazard has been identified
that would preclude the prudent and conservative use of diagnostic ultrasound in education and
research, experience from normal diagnostic practice may or may not be relevant to extended
exposure times and altered exposure conditions. It is therefore considered appropriate to make the
following recommendation:
In those special situations in which examinations are to be carried out for purposes other than
direct medical benefit to the individual being examined, the subject should be informed of the
anticipated exposure conditions, and of how these compare with conditions for normal diagnostic
practice.
This unit is internally powered equipment, and it is an IEC/EN 60601-1 Type B applied
part. Type B protection means that the connection between the equipment and personnel
complies with permitted leakage currents and dielectric strength of IEC/EN 60601-1.
WARNING and CAUTION messages must be observed. To avoid the possibility of injury,
observe the following precautions during the operation of the device.
WARNING
1 The Doppler is a tool to aid the healthcare professional and should not be used in
place of normal fetal monitoring. It is not intended for treatment.
2 Placement of the ultrasound transducer on the abdomen is critical to obtaining the
fetal heart beat as opposed to maternal heart beat or other abdominal noise. The
user should be trained in proper placement techniques either through acceptable
Ob/Gyn training and individual state accreditation, or as being prescribed by such a
trained clinician and trained in device placement.
3 This device is not explosion-proof and can not be used in the presence of flammable
anaesthetics.

SD3 Series Ultrasonic Pocket Doppler User Manual Safety Guide
- 3 -
WARNING
4 Magnetic and electrical fields are capable of interfering with the proper performance
of the device. For this reason, make sure that all external devices operated in the
vicinity of this device comply with the relevant EMC requirements. X-ray equipment
and magnetic resonance imaging (MRI) devices can emit high levels of
electromagnetic radiation.
5 This device is MR unsafe. It is not intended for use in an MRI environment.
6 The device is not protected against defibrillation.
7 Do not use the device with HF surgical equipment.
8 Do not touch the signal input/output connector and the patient simultaneously.
9 Only use the probes provided by the manufacturer.
10 We recommend that exposure to ultrasound should be kept as low as reasonably
achievable. This is considered to be good practice and should be observed at all
time.
11 SHOCK HAZARD - Do not attempt to connect or disconnect a power cord with wet
hands. Make certain that your hands are clean and dry before touching a power
cord.
12 Accessory equipment connected to the analog and digital interfaces must be
certified according to the respective IEC/EN standards (e.g. IEC/EN 60950 for data
processing equipment and IEC/EN 60601-1 for medical equipment). If in doubt,
consult our technical service department or your local distributor.
13 Before using the battery, make sure to read the user manual and safety precautions
thoroughly.
14 Do not heat or throw batteries in fire as this may cause explosion.
15 Do not short-circuit the batteries or install the batteries reversely.
16 Do not attempt to charge normal alkaline batteries. They may leak, catch fire or even
explode.
17 Do not solder the leading wire and the battery terminal directly.
18 Do not destroy the battery: Do not pierce battery with a sharp object such as a
needle; do not hit with a hammer, step on or throw or drop to cause strong shock; do
not disassemble or modify the battery.
19 The battery should be charged, used or stored away from the static electricity.
20 Store the batteries in a cool and dry environment.
21 Do not connect the battery cable connector or battery socket with metal objects,
which can result in short circuit.
22 If rechargeable batteries are used, charge them fully before initial use by using the
method introduced in this manual.

SD3 Series Ultrasonic Pocket Doppler User Manual Safety Guide
- 4 -
WARNING
23 The rechargeable batteries should be charged by using the dedicated charger
supplied by the manufacturer.
24 If the rechargeable batteries are stored alone and not used for a long time, we
recommend that the batteries should be charged at least once every 6 months to
prevent overdischarge.
25 Replacement of the battery or charging the battery shall be done at least 1.5 meters
away from patients.
26 The device shall only be used when the battery cover is closed.
27 If the Doppler is not used for a long time, please remove the battery and store it as
required.
28 If the liquid leak from the battery spills onto your skin or clothes, wash well with fresh
water immediately.
29 If the liquid leak from the battery gets into eyes, do not rub the eyes. Wash them well
with clean water and see a doctor immediately.
30 Keep away from fire immediately when leakage or foul odor is detected.
31 Batteries have life cycles. The alkaline batteries are intended to be used once. If the
time that the Doppler using NI-MH battery or lithium battery become much shorter
than usual, the battery life is at an end. Replace alkaline or NI-MH batteries with
those of identical specifications provided by the manufacturer or purchased locally.
Replace lithium batteries with only those provided by the manufacturer.
32 Stop using the battery if abnormal heat, odor, discoloration, deformation or abnormal
condition is detected during use, charge, or storage. Please dispose it according to
the local regulations.
33 Do not immerse, throw, or wet the battery in water/seawater.
34 Do not connect any equipment or accessories that are not approved by the
manufacturer or that are not IEC 60601-1 approved to the device. The operation or
use of non-approved equipment or accessories with the device is not tested or
supported, and device operation and safety are not guaranteed.
35 Using accessories other than those specified by the manufacturer may result in
increased electromagnetic emissions or decreased electromagnetic immunity of the
device.
36 The device should not be used adjacent to or stacked with other equipment and that
if adjacent or stacked use is necessary, the device should be observed to verify
normal operation in the configuration in which it will be used.
37 The medical electrical equipment needs to be installed and put into service
according to the EMC Information provided in this user manual.
38 Portable and mobile RF communications equipment can affect medical electrical
equipment, refer to sectionA3.4 Recommended Separation Distances.
39 Do not service or maintain the device or any accessory which is in use with a patient.

SD3 Series Ultrasonic Pocket Doppler User Manual Safety Guide
- 5 -
WARNING
40 The appliance coupler or mains plug is used as isolation means from supply mains.
Position the Doppler in a location where the operator can easily access the
disconnection device.
CAUTION
1 Refer servicing to qualified personnel.
2 The main unit is designed for continuous operation and is ‘ordinary’. Do not immerse
it in any liquid (i.e. not drip or splash-proof).
3 Keep the device in a clean environment and avoid vibration during storage.
4 Do not sterilize the Doppler with autoclave or gas.
5 Electromagnetic Interference - Ensure that the environment in which the device is
operated is not subject to any source of strong electromagnetic emissions, such as
radio transmitters, mobile telephones, etc.
6 Prior to examination using the Doppler, check for visible damages of the main unit
and the probe that may endanger the patient/operator or machine performance. If
the damage is found, replace them with good ones at once.
7 The following safety checks should be performed once every two years or as
specified in the institution’s test and inspection protocol by a qualified person who
has adequate training, knowledge, and practical experience to perform these tests.
Inspect the equipment for mechanical and functional damage.
Inspect the safety relevant labels for legibility.
Verify that the device functions properly as described in the instructions for use.
Test the pregnant woman’s leakage current according to IEC 60601 Limit: d.c
10 µA, a.c 100 µA.
The leakage current should never exceed the limit. The data should be recorded in
an equipment log. If the device is not functioning properly or fails any of the above
tests, the device has to be repaired.
8 The device and accessories are to be disposed of according to local regulations after
their useful lives. Alternatively, they can be returned to the dealer or the
manufacturer for recycling or proper disposal. Batteries are hazardous waste. Do
NOT dispose them together with house-hold garbage.

SD3 Series Ultrasonic Pocket Doppler User Manual Safety Guide
- 6 -
1.3 Symbols
No.
Symbol
Definition
1
CE marking
2
Disposal method
3
Caution: Federal (U.S.) law restricts this device to sale by
or on the order of a physician.
4
Operating instructions
5
Caution
6
MR Unsafe –keep away from magnetic resonance imaging
(MRI) equipment
7
Current: Direct
8
TYPE B APPLIED PART
9
Part Number
10
SERIAL NUMBER
11
Date of manufacture
12
MANUFACTURER
13
AUTHORISED REPRESENTATIVE IN THE
EUROPEAN COMMUNITY
14
General symbol for recovery/recyclable
15
Power adapter connector

SD3 Series Ultrasonic Pocket Doppler User Manual Safety Guide
- 7 -
16
Headphones
17
Output
18 *
Conforms to UL Std. 60601-1, IEC Std. 60601-2-37
Certified to CSA Std. C22.2 No 601.1, CSA Std. C22.2 No
60601-2-37,
19
Refer to User Manual
(Background: Blue; Symbol: White)
20
Warning
(Background: Yellow; Symbol&Outline: Black)
NOTE:
1) * The symbol for UL is only for UL model.
2) The user manual is printed in black and white.

SD3 Series Ultrasonic Pocket Doppler User Manual Doppler andAccessories
- 8 -
Chapter 2 Doppler and Accessories
2.1 Features
There are five different models available: SD3 LITE, SD3, SD3 PLUS, SD3 PRO and SD3
VASCULAR.
SD3 LITE and SD3 VASCULAR are for simple auscultation (intermittent listening). SD3, SD3
PLUS and SD3 PRO not only detect fetal heart sound; they also display the fetal heart rate on an
OLED screen.
The features of the Dopplers are listed in the following chart.
Model
Function
SD3 LITE
SD3
SD3 PLUS
SD3 PRO
SD3 VASCULAR
Display Panel
×
√
√
√
×
LED Indicator
√
×
×
×
√
No Signal Auto
Shutdown
×
√
√
√
×
HR Display
×
√
√
√
×
Power Display
×
√
√
√
×
Low Power Hint
√
√
√
√
√
Noise Reduction
×
×
√
√
×
Audio Play
√
√
√
√
√
Volume Adjustable
√
√
√
√
√
Earphone Socket
√
√
√
×
√
Record/PC Upload
×
×
×
√
×
ProbeAuto Shutdown
×
×
√
√
×
Probe Changeable
√
√
√
√
√
8 MHz Waterproof
Probe
Optional
Optional
Optional
Optional
Optional
5 MHz Waterproof
Probe
Optional
Optional
Optional
Optional
Optional
4 MHz Waterproof
Probe
Optional
Optional
Optional
Optional
√

SD3 Series Ultrasonic Pocket Doppler User Manual Doppler andAccessories
- 9 -
3 MHz Waterproof
Probe
√
√
√
√
×
2 MHz Waterproof
Probe
Optional
Optional
Optional
Optional
×
Portable bag
√
√
√
√
√
Power Adapter
×
×
√
√
×
AA size Alkaline
Battery
Optional
Optional
×
×
Optional
Rechargeable NI-MH
Battery/Charger
Optional
Optional
×
×
Optional
Charge Stand
×
×
Optional
Optional
×
Charging the Doppler
×
×
√
√
×
Rechargeable Lithium
Battery
×
×
√
√
×
Trolley
Optional
Optional
Optional
Optional
Optional
Gel
√
√
√
√
√
√ = configured ×= not available
For the Essential Performance of SD3 series, refer to Appendix 1 in details.
2.2 Main Unit
NOTE:
The pictures and interfaces in this manual are for reference only.
2.2.1 Appearance
Take 2 MHz obstetrical probe for example.
SD3 PRO/SD3 PLUS/SD3 SD3 LITE SD3 VASCULAR
Figure 2-1 Front Panel
1
2
3

SD3 Series Ultrasonic Pocket Doppler User Manual Doppler andAccessories
- 10 -
SD3 PRO/SD3 PLUS SD3/SD3 LITE/ SD3 VASCULAR
Figure 2-2 Rear Panel Figure 2-3 Left Panel
Figure 2-4 Top Panel Figure 2-5 Right Panel
1
Display Panel (SD3
PRO/SD3/SD3 PLUS)
2
Speaker
3
Working State Indicator
(SD3 LITE/SD3 VASCULAR)
4
Battery Compartment
(SD3 PLUS/SD3 PRO)
5
Charge Stand Socket
(SD3 PLUS/SD3 PRO)
6
Battery Compartment (SD3
LITE/SD3/ SD3 VASCULAR)
7
Volume Control
8
Probe Holder
9
Probe
10
Probe Socket
11
Audio Socket (SD3
PRO)
12
Charge Socket (SD3 PLUS/SD3
PRO)
13
Record Button
(SD3 PRO)
14
Earphone Socket (SD3
LITE/SD3/SD3 PLUS/
SD3 VASCULAR)
2.2.2 Display Panel
For SD3, SD3 PRO, and SD3 PLUS, the OLED is shown as follows:
14
10
11
12
13
8 9
4
5
6
7
4
5
6
7

SD3 Series Ultrasonic Pocket Doppler User Manual Doppler andAccessories
- 11 -
Real-time Test Record Play
Charge Error Real-time Test
Figure 2-6 OLED Display
When 4/5/8 MHz vascular probe is plugged in, the OLED displays the probe type instead of the
FHR.
No.
Symbol
Description
1
HR being calculated
2
Full capacity
3/4 capacity
2/4 capacity
1/4 capacity
Empty, the flickering interface prompts replacement or
charging of battery.
3
HR: 50-240
4
SD3 PRO: in playing status
5
SD3 PRO: in recording status
6
The machine is not connected to the probe.
7
Probe frequency
8
Charge interface:
Electric energy pane refreshed from negative polarity
to positive polarity
charge completed

SD3 Series Ultrasonic Pocket Doppler User Manual Doppler andAccessories
- 12 -
charge error
For SD3 LITE without OLED, the LED is shown as follows:
Power on
Green
Power off
Off
Low capacity
Orange
Probe off
Flickering green
Probe off and low capacity
Flickering orange
2.2.3 Buttons
There is a push button (REC/PLAY), a volume control button and a power button on the main
unit of the Doppler. Their primary functions are as follows:
(1) REC/PLAY
(Only for SD3 PRO)
Function: Start/ stop recording or playing fetal heart sound.
(2) Volume Control Indicator
Function: Adjust volume. Rotate the volume gear toward “+”to turn up the volume, while
rotate it toward “-”to turn down the volume.
(3) Power
Function: Power the Doppler on or off.
2.2.4 Socket
The two sockets are located on the side panel of the Doppler.
(1) Earphone socket : (SD3 LITE, SD3, SD3 PLUS, SD3 VASCULAR) for outputting
audio signals, the earphone or line-in cable connects to the Doppler via this socket.
Audio output : (SD3 PRO) for outputting audio signals.

SD3 Series Ultrasonic Pocket Doppler User Manual Doppler andAccessories
- 13 -
(2) Charge socket : (SD3 PRO, SD3 PLUS) for charging the battery, the dedicated
power adapter connects to the Doppler via this socket.
NOTE:
Accessory equipment connected to the analog and digital interfaces must be certified
according to the respective IEC/EN standards (e.g. IEC/EN 60950 for data processing
equipment and IEC/EN 60601-1 for medical equipment). If in doubt, consult our
technical service department or your local distributor.
2.2.5 Probe Socket
The probe socket is as shown in figure 2-7.
Figure 2-7 Probe socket
Connect the probes supplied by the manufacturer to the Doppler through the probe socket.
CAUTION
1 Do not try to connect any other plug to the probe socket except the plug of the probes
mentioned above.
2 Do not stretch the probe cable for more than two meters long.
2.2.6 Batteries
SD3 LITE,SD3 and SD3 VASCULAR are powered either by three alkaline batteries or three
rechargeable NI-MH batteries.
SD3 PLUS and SD3 PRO are powered by a lithium battery.
NOTE:
The alkaline battery and rechargeable NI-MH battery can be replaced by those of
identical specifications purchased locally.
Alkaline battery: AA, LR6, 1.5 V.
Rechargeable NI-MH battery: AA, R6, 1.2 V.

SD3 Series Ultrasonic Pocket Doppler User Manual Doppler andAccessories
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2.3 Probes
2.3.1 Waterproof Obstetrical Probes
2 MHz/3 MHz waterproof obstetrical probes can be connected to the main unit for fetal heart
examining.
The 2 MHz obstetrical probe features in deep penetration and is designed for use during the third
trimester pregnancy. The 3 MHz obstetrical probe features in high sensitivity and is designed for
use as early as 9 weeks.
Figure 2-8 2/3 MHz obstetrical probe
2.3.2 Waterproof Vascular Probes
The 4 MHz/5 MHz/8 MHz waterproof vascular probes can be connected to the main unit for
artery and vein blood flow examining.
Figure 2-9 4/5/8 MHz Vascular Probes