EDAN SONOTRAX Basic User Manual - page 26
SONOTRAX Series Ultrasonic Pocket Doppler User Manual Examining
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NOTE:
1 The best quality records will only be obtained if the probe is placed in the optimum
position.
2 Positions with strong placental sounds or umbilical blood flow sound should be
avoided.
3 If the fetus is in the cephalic position and the mother is supine, the clearest heart
sound will normally be found on the midline below the umbilicus. During examining,
the pregnant woman’s prolonged lying in the supine position should be avoided
owing to the possibility of supine hypotension. Sitting up or lateral positions are
preferable and may be more comfortable.
4 It is impossible to examine FHR unless a fetal heart sound is present. The fetal pulse
can be distinguished from the maternal pulse by feeling the mother’s pulse during
the examination.
4.2 FH Sound Recording and Playing
This function is only available with SONOTRAX Pro and SONOTRAX II Pro.
Recording:
In mode 1, 2 or 3, press and hold the
button for three seconds, the machine starts recording,
and the LCD reads
.
The longest record time is 240 seconds. When the time is up or the
button is pressed again,
the Doppler stops recording and returns to the real-time status.
NOTE:
Only the last set of recorded fetal heart sounds is saved in the Doppler. It is cleared
when new sounds are recorded.
Playing:
When the machine is not recording in mode 1, 2 or 3, press the
button once, the machine
plays the recorded sound, and the LCD reads
.
When the recorded sound comes to the end or the
button is pressed again, the Doppler
stops playing and returns to the real-time status.