
CADENCE II Fetal Monitor User Manual
- 63 -
A3.4 Ultrasound Monitoring of FHR
Phenomenon Possible
Cause
Solution
Thick abdominal wall
Monitor FHR with DECG if the
membrane is adequately ruptured.
Improper ultrasound transducer
position.
Adjust the position of the
transducer till the better signal is
received.
Loose belt.
Tighten the belt.
Superfluous aquasonic coupling
gel.
Wipe off superfluous aquasonic
coupling gel.
Frequent fetal movements.
Delay the monitoring.
Maternal movement.
Request the patient to calm down
and stay still.
Inconstant trace
/ display
Inadequate aquasonic coupling
gel.
Use recommended aquasonic
coupling gel quantity.
Record maternal heart rate
wrongly.
Change the position of the
ultrasound transducer.
Doubtful FHR
The transducer is not well placed
in position, and the mixed noise
has been recorded.
Adjust the position of the
transducer.
Improper paper
Use the paper recommended by
the manufacturer.
Faint trace or no trace
Adjusting nuts of the print head
are unbalanced.
Contact the manufacturer for
service.
A3.5 DECG Monitoring of FHR
Symptom Possible
Cause
Solution
No ECG signal
Use a new spiral electrode
Inconstant trend
Inconstant display
Bad contact of reference
electrode and patient
Use a new spiral electrode
Inconstant trend
The DECG cable has not
been fixed firmly
Fix an attachment pad at the
DECG cable.