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1. Select the setup key
2. Select Fetus > UA Baseline.
3. Select 5, 10 (default), 15 or 20.
4. Select OK.
7.4 Monitoring Fetal Movement
7.4.1 Auto Fetal Movement Monitoring (AFM)
During fetal heart monitoring with ultrasound, fetal movement signals are also detected. The fetal
movement signals differ from the Doppler heart rate signals in that they have larger extent and
lower frequency. The larger extent is due to the bigger scope of moving areas (e.g., the fetal arms
or legs); lower frequency is due to the lower velocity of the fetal movements compared with those
of the fetal heart.
Only the US1 channel can monitor AFM. Be aware that when monitoring twins, the movements
detected by US1 may also be caused by the second fetus's movement.
The movement of the fetus will be detected and displayed in the form of a trace on the screen and
the recorder paper.
AFM monitoring can be switched off and is gain adjustable.
7.4.2 Enabling or Disabling AFM Trace
The AFM trace on the screen can be enabled or disabled.
1. Select the setup key
2. Select Fetus > AFM.
3. Select ON or OFF (default).
4. Select OK.
7.4.3 Changing AFM Gain
The AFM gain affects overall numeric values and scope of the AFM trace.
1. Select the setup key
2. Select Fetus > AFM Gain.
3. Select 1, 2, 3 (default) or 4.
4. Select OK.
on the main interface.
on the main interface.
on the main interface.
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Chapter 7: Fetal Monitoring
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