FM5000C - FM5000PLUS
Maternal/Fetal Monitor
(3) Connect the ultrasound transducer to the abdomen of the pregnant woman and then adjust its position
until you find loud fetal heart signal.
(4) Fix the ultrasound transducer with the belt.
Note
Make sure the belt is tied to the proper position with proper tightness.
(5) Make sure you can hear the fetal heart beats in the monitoring process. Do not adjust FHR volume to
zero. The FHR curve is not reliable without strong fetal heart signals.
(6) If there is any strong fetal movement or uterine contraction or the pregnant woman moves her body, the
fetal heart position may change a lot. Please check whether you can hear clear fetal heart beats from
time to time. If not, please adjust the position of the ultrasound transducer to find strong fetal heart
signals again.
14.2.2 Cross-Channel Verification
The fetus is not necessarily alive even if the fetal heart rate is detected, because the ultrasound transducer
may collect signals from other sources, like the mother’s heart, aorta, or large vessel pulsation.
During fetus monitoring, if the monitored heart rates (from a fetal or mother) coincide at any time, the same
heart rate is probably being monitored by more than one transducer. The corss-channel verification feature is
helpful to detect whether the same heart rate is being monitored by more than one transducer.
How to activate the cross-channel verification feature:
1. Select FHR waveform, in the pop-up [FHR SETUP] menu, select [CROSS DUR] and adjust the
duration for cross-channel verification. Available duration includes [OFF], [30 S], [60 S], [90 S] and [120
S]. [OFF] means the monitor will not give alarms even though the monitored heart rates coincide; [30 S]
means when the monitored FHR1 and FHR 2, or the monitored fetal heart rate and maternal heart rate
coincide for more than 30 seconds, the monitor will give a high level technical alarm.
2. Select [CROSS ERROR] and select the allowable error for cross-channel verification. Available options
include [0bpm], [1bpm], [2bpm], [3bpm], [4bpm] and [5bpm]. [0bpm] means once the monitored FHR1
and FHR 2, or the monitored fetal heart rate and maternal heart rate coincide for more than the time set in
[CROSS CUR], the monitor will give a high level technical alarm; [1bpm] means when the
difference between the monitored FHR1 and FHR 2, or the monitored fetal heart rate and maternal heart
rate is less than or equal to 1bpm and lasts for more than the time set in [CROSS CUR], the
monitor will a high level technical alarm.
3. The technical alarm message is [ADJT ULTRAS POSITION](Adjust the positions of ultrasound
transducers ) and the FHR1 and FHR2 parameter area will display “_？_” at the same time.
14.2.3 Trace Separation
The trace separation function is to help you interpret traces with similar baselines.
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General