F Series Fetal & Maternal Monitor User Manual Troubleshooting
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Inconstant trend
The DECG cable has not been
fixed firmly
Fix an attachment pad at the
DECG cable.
A3.6 Troubles with Contractions Monitoring (External)
Phenomenon Possible Cause Solution
Bad trace quality or
fluctuant TOCO baseline
The belt is too tight or too loose. Adjust the belt.
The belt has no elasticity. Renew the belt.
Maternal movement.
Request the patient to calm
down and stay still.
Frequent fetal movements. Delay the monitoring.
Too high TOCO
sensitivity (higher than
100 unit)
The body pressure from uterus to
TOCO transducer is far higher
than the average numeric.
Insure favorable contact for
patient skin with TOCO
transducer. Change the position
of TOCO transducer, if
necessary.
A3.7 Troubles with Monitoring Contractions (Internal)
Symptom Possible Cause Solution
No trend
The intrauterine catheter is
jammed.
Wash with disinfector.
No pressure change
when uterine contraction
“Dry” environment or the tip of
intrauterine catheter is placed
extraovularly.
Wash with disinfector or change
the position of transducer.
Only see the IUP peak
but no baseline
Zero adjustment is wrong. Zero the system.
The trend is a beeline The connector failure.
Move or contact catheter. If
trend no fluctuation, change
intrauterine cable.
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