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F9 Fetal & Maternal Monitor • User Manual
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7.3.5 DECG Monitoring Procedure
Please refer to the manufactures directions for the Fetal Spiral Electrode.
WARNING : Do not plug the fetal spiral electrode wire in to the power socket.
CAUTION : Do not mistake the higher maternal heart rate for DECG.
NOTE:
1) If there is any doubt as to the presence of a fetal heart signal with ECG, check using 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 securely 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 forcefully.
Dispose of the used fetal spiral electrode in accordance with all applicable Federal, State and local
medical/hazardous waste practices. Do not use it again.
7.4 Monitoring Twin FHRs
7.4.1 Monitoring Twins Externally
To monitor twin FHRs externally, you need to connect a US transducer to the US1 socket and the
second US transducer to the US2 socket of the monitor. Follow the instructions described in Section
7.2 to acquire FHR signals for both channels. Press the
CHANNEL
button to switch the FH sound
from one channel to the other.
When the two US transducers are in place, make sure the FH sounds from both channels are clear.
Two FHR traces and two FHR values are displayed on the screen.
7.4.2 Monitoring Internally
Alternatively, you can monitor a FH using ultrasound externally, and monitor the second FH using
DECG internally.