Little Martin’s BFD1609 User manual

Little Martin’s Fetal Sound Amplier
User Manual
For Model BFD1609

In order to ensure you and your baby’s safety, please be sure to read
this manual before using this product, and use it correctly.
• Please keep this manual in a safe place.
• When attaching the extra parts, please be sure to carefully read
manual before doing so.
• When giving this away as a gift, please be sure to include this
manual.
Contents
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.............................................................on the back cover
Before Using
About The Product
How The Product Works
Listen To The Sound Of The Fetal Heartbeat
Record The Sound Of The Fetal Heartbeat
Playback The Sound Of The Fetal Heartbeat
Transit The Fetal Heartbeat Rate
Average Fetal Heartbeat Rate
Audio Record
Safety Terms & Conditions
Safety Alert Descriptions
Name Of Parts
How To Use The Fetal Sound Amplier
Product Maintenance
Important Tips
Visual Inspection
Cleaning The Product
Disinfection
Recycling The Battery
Specications
Environmental Requipments
Symbol Descriptions
Troubleshooting
Warranty Certicate
1

Before Using
About The Product
Become familiar with the controls and how to use the product
properly before operating the product.
The product normally detects fetuses starting from 9 weeks, but can
take up to 12-14 weeks depending on each individual.
Normally there are no contraindications for use. For specic cases,
please consult your doctor.
Please consult your doctor about how to use at home.
It should not be used in life supporting or life sustaining
applications.
Caution
The product is a lightweight, portable detector. It is designed to
meet your detecting and hearing needs by providing advanced
detecting functions and a full range of sound of the fetal heartbeat.
The product is mainly used to detect the fetal heartbeat rate (FHR)
and the sound of the fetal heartbeat (SFH).
The growth and development of a fetus can be found out through
examination of these indices. It is applicable for department of
gynaecology and obstetrics and clinic daily.
In accordance with classication criteria in Annex IX on “Medical
Device Directive 93/42/EEC”, the product is class IIa based on rule 10,
“Devices for Direct Diagnosis or Detection on physiological process”.
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Little Martin’s Fetal Sound Amplier consists of a probe (transmitter
and receiver) and signal process unit. Ultrasonic waves are transmit-
ted from one piezoelectric ceramic at the front of the probe to the
uterus of the pregnant women. Echo is received by the other
piezoelectric ceramic at the front of the probe when the ultrasonic
waves reach the fetal heart. Then it is converted into voltage.
This Doppler signal is detected and demodulated from the received
signal, and the Doppler frequency is consistent with the rhythm
of the fetal systole and diastole. Once cardiac valves vibrate and
a Doppler frequency excursion is formed. It is transmitted as an
output signal of cardiac valves vibrating, and is then sent to the
loudspeaker for getting a rhythmical sound with the fetal heartbeat.
Simultaneously, it is sent to a counter which calculates the fetal
heartbeat rate. (bpm=beat per minute)
How The Product Works
Listen To The Sound Of The Fetal Heartbeat
Record The Sound Of The Fetal Heartbeat
Playback The Sound Of The Fetal Heartbeat
The sound of the fetal heartbeat can be played through earphones
or speakers.
When the device is connected to record devices with USB cable, it
can transmit the sound of the fetal heartbeat to record devices, such
as cellphones or computers, and save it into the record devices.
Operator can playback the sound of the fetal heartbeat saved in the
record devices.
3

Average Fetal Heartbeat Rate
Transit The Fetal Heartbeat Rate
Audio Record
Safety Terms & Conditions
The detected fetal heartbeat signal will be calculated once every
ve seconds for the average FHR and the result will be displayed.
The instrument automatically displays the value according to the
fetal heartbeat detected by the probe instantly.
The sound of the fetal heartbeat can be recorded by a device which
is connected with the product.
As a safety advisement, this product can only be connected with a
recorder complaint with the safety requirements of IEC 60601-1.
The signal words shown below identify the potential hazard
categories. The denition of each category is as follows:
This alert identies hazards that will cause serious personal injury
or death.
This alert identies hazards that may cause serious personal injury
or death.
This alert identies hazards that may cause minor personal injury,
product damage, or property damage.
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Danger
Warning
Caution