Automatic Switch-Off - Huntleigh sonicaidONE Guide De L'utilisateur

10
In later pregnancy:
Once fetal position has been determined by abdominal palpation, start by
placing the probe face between the shoulder blades of the fetus, then move
or angle the probe until the clearest heart sounds are obtained (under
normal circumstances, this will sound like galloping horses).
4 With each beat the heart symbol flashes on the display. At first only the
outer part of the symbol is illuminated but as more beats are clearly detected
the inner part is also shown. This acts as a signal confidence indicator for a
valid rate.
5 After a few seconds the heart rate is displayed, averaged over three to five
beats, and accurate to ±2bpm. If you are in any doubt as to the accuracy of
the rate, use the manual count facility (see below), or use continuous fetal
monitoring equipment.
6 When you have completed the examination, switch the unit off by pressing
the green button. Wait at least five seconds before switching on again.
7 Wipe the probe clean before stowing.

Automatic switch-off

The SonicaidOne automatically switches itself off after 2 minutes if no signal is
detected, and after 5 minutes if a rate has been displayed.
Volume control
When the SonicaidOne is switched on, the volume is the same as the last time
the instrument was used. To increase the volume, press or hold down the
volume up button. To decrease the volume, press or hold down the volume
down button.
Manual count
In difficult circumstances a rate may be audible, yet the signal not strong
enough for a rate to be displayed. In this situation you can use the manual
count feature. The manual count requires ten pulse intervals, so press the
button on the first beat and release it on the eleventh.
1 Find an audible fetal heartbeat.
2 Press and hold the manual count button. 'T' is shown on the display.
3 Count 10 consecutive beats.
4 On the count of the 11th beat, release the manual count button. The heart
rate is displayed.
SonicaidOne User Guide