CADENCE II Fetal Monitor User Manual
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7.3.5 DECG Monitoring Procedure
1 Perform a vaginal examination to identify the fetal presenting part.
2 Prepare the patient’s skin using the procedures described in section 7.3.3 Preparing the
Patient's Skin Prior to Placing Electrodes.
3 Attach the fetal spiral electrode to the fetal presenting part using the procedures
described in section 7.3.4 Directions for Use of Fetal Spiral Electrode.
4 Fix an attachment pad electrode to DECG cable.
5 Remove the film on the back of the electrode and place the electrode on maternal thigh;
press it firmly in place.
6 Connect the fetal spiral electrode to the DECG cable.
7 Insert connector of DECG cable into the DECG socket of the monitor.
8 Check the setup of DECG arrhythmia logic.
WARNING :
Do not plug the fetal spiral electrode wire into the power socket.
CAUTION :
Do not mistake the higher maternal heart rate for DECG.
NOTES:
1) If there is any doubt as to the presence of a fetal heart signal with ECG, check with
the US transducer on the patient’s abdomen or with a separate diagnostic
instrument. The presence of an audible Doppler heart sound at a rate distinct from
that of the maternal pulse is unequivocal evidence of the fetal life.
2) After the electrode is well attached, allow a few minutes for the electrode and fetal
tissue to become stabilized. It is essential that the ECG signal electrode is in good
contact with the fetal presenting part.
7.3.6 Detaching the Fetal Spiral Electrode
To detach the fetal spiral electrode, rotate it counterclockwise until it is free from the fetal
presenting part. Do not pull the electrode from the fetal skin.
Dispose of the used fetal spiral electrode in a proper way. Do not use it again.
7.3.7 Switching DECG Arrhythmia Logic On or Off
When the DECG arrhythmia logic is enabled, the monitor only records the transient heart rate
change that is smaller than ±25bpm. If the heart rate change exceeds this limit, it will not be
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