CADENCE II Fetal Monitor User Manual
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FHR with DECG.
NOTE:
If the DECG sound is not switched off, the fetal heart sound of the twins will be heard
simultaneously.
7.4.3 Signals Overlap Verification (SOV)
If the two US transducers are aimed at the same fetal heart, or the US transducer is aimed at the
fetus that the fetal spiral electrode is attached to, an alarm message “Signals Overlap” will appear
on the screen to warn you.
If you are monitoring FHR externally, adjust one of the transducers’ position to find the second
fetal heart.
If you are monitoring FHR internally, adjust the US transducer’s position to find the second fetal
heart.
To switch the SOV alarm on or off,
1 Press the SETUP key twice to open the Alarm Configuration menu.
2 Press the UP key or DOWN key to move the cursor to SOV; press the CHANNEL key.
3 Press the UP key or DOWN key to toggle between On and Off (default).
4 Press the CHANNEL key to confirm selection.
5 Press the AUTO key to exit.
7.4.4 Changing FHR2/DECG Offset
In order to distinguish FHR1 trend from FHR2/DECG trend, FHR2 offset is provided to help you
separate the two trends by an offset of -20 bpm or +20 bpm.
1 Press the SETUP key four times to open the Print Configuration menu.
2 Press the UP key or DOWN key to move the cursor to FHR2Offset; press the
CHANNEL key.
3 Press the UP key or DOWN key to choose the offset from -20 bpm, 0 bpm and +20 bpm.
4 Press the CHANNEL key to confirm selection.
5 Press the AUTO key to exit.
This preset FHR2 offset will be printed on the recorder paper.
“FHR2 -20bpm” means the FHR2/DECG trend is 20bpm lower than it really is.
“FHR2 0bpm”means the FHR2/DECG trend is staying at where it really is.
“FHR2 +20bpm”means the FHR2/DECG trend is 20bpm higher than it really is.
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