1) Delicate and compact design, portable and easy to use
2) Crooked probe structure, which is easy to operate and increases the feeling of comfort, embodies the humanized design.
3) Three working modes: Real-time FHR Display Mode, Averaged FHR Display Mode and Manual Mode
4) High precision FHR digital LCD screen
5) Probe falls off detection, battery status indication
6) Pluggable USB probe interface, a probe can be replaced
7) Automatic shutdown: The device will automatically turn off if there is no signal within 1 minute.
8) Audio interface: Can be connected to other recording devices by recording cable, record fetal heart sound in real-time
9) Two 1.5V batteries (AA LR6) can last more than 8 hours for normal use
Why you need this fetal doppler? Please see more pictures below.
How to Use:
Time: 1-3 times a day. It is best to do it within 30-60 minutes after breakfast, lunch, and dinner. The fetal heart rate should not exceed 2-3 minutes.
Environment: no electromagnetic or radiation around
Auxiliary: Coupling agent
The first step: pregnant mother lying flat
When listening to the fetal heart, expectant mothers need to find a quiet, lie-down environment, a slightly elevated head, legs straight, and relaxed. After lying down, the position of the fetal heart will be closer to the abdominal wall, and the distance from the fetal heart rate probe is closer. It is easier to listen to the fetal heart.
Step 2: Apply couplant
Ultrasonic waves are easily lost in the air, and the couplant acts to squeeze out the air in the pores of the skin, bringing the probe into close contact with the skin. If there is no coupling agent, water or cooking oil is also acceptable.
Step 3: Find the position of the fetal heart
1 Before using it for the first time, open the battery cover of the fetal heart rate meter and insert the battery. Plug in the headphones to the headphone jack of the main unit or listen directly.
2 Keep the probe close to the abdominal wall, use a little soft force to prevent noise from being stored between the probe and the belly. The simplest is to refer to the location where the doctor places the probe at the time of the fetal heart examination in the hospital. It is the position of the fetal heart, and you can hear the sound of the fetal heartbeat.
3 If the reference doctor listens to the fetal heart position and does not hear the fetal heart, the pregnant woman can slowly move the probe in the nearby position. The position of the fetal heart is as follows:
16 months ago, the position of the fetal heart was often in the middle or both sides of the midline of the lower abdomen. At 6 to 8 months, as the fetus grows, the position of the fetal heart will also move up.
2 Because the fetal movement is usually the movement of the baby’s hands and feet, when the right side feels the fetal movement is frequent, the fetal heart is generally on the left side; when the left side feels the fetal movement is frequent, the fetal heart is generally on the right side.
The 3 fetal heart sounds are transmitted from the shoulders of the fetus, so the fetal heart sounds heard on the abdominal wall of the pregnant woman near the back of the baby are most clear. The position of the head and the breech also affect the position of the fetal heart. The fetal heart is in the left or right side of the umbilicus in the head position, and the fetal heart is on the left or right side of the umbilicus.
Step 4: Listen to the fetal heart
After finding the correct fetal heart position, you can clearly hear the fetal heartbeat sound of “”, “” and “”. After hearing the baby’s stable continuous fetal heart sound, it will be static for a period of time, so that the fetal heart rate probe receives stable and continuous. The fetal heart signal, the value displayed at this time is only desirable. If you hear the noise, it is usually the echo of amniotic fluid. It is not a problem with the fetal heart rate. It does not mean that the baby’s fetal heart is not normal. You don’t have to worry too much.
Generally, each time you listen for 1-2 minutes, calculate the number of heartbeats of the fetus for 1 minute, and 120-160 hops/minute is the normal range. Note that the value of the fetal heart rate is not static, but there will be small fluctuations, which is normal.