15 Monitoring Uterine Activity Internally
135
Troubleshooting
Internal (IUP) Monitoring
Problem Possible Causes Solutions
No change in pressure during
contraction.
Dry environment or possible extra-
ovular placement of sensor tip.
Please refer to catheter Instructions for Use.
Only pressure peaks can be
seen (baseline not visible).
Zero adjustment is incorrect. Zero the system.
Trace is a straight line. Transducer is defective. Remove and touch the catheter. If the trace
does not show up and down movements, use a
new transducer.
Catheter blocked. Please refer to catheter Instructions for Use.
Trace is superimposed with
noise.
End of catheter is in the uterine wall. Please refer to catheter Instructions for Use.
IUP EQUIP MALF INOP is displayed. See “Patient Alarms and INOPs” on page 73.
IUP UNPLUGGED INOP is displayed.
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