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SONOTRAX(2009) Series Ultrasonic Pocket Doppler User Manual
45
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.
5 When applied to the patient, the ultrasound
transducer may warm slightly (less than 4°C
(7.2°F) above ambient temperature). When
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