Philips Avalon FM30 - Troubleshooting

14 Monitoring Uterine Activity Externally
131
Troubleshooting
External Toco Monitoring
Problem Possible Causes Solutions
Quality of the trace deteriorates
or the Toco baseline varies.
The belt is incorrectly fastened and is
too slack or too tight or the belt has lost
its elasticity.
The belt must be tight enough to ensure
good contact between the patient's skin
and the entire surface of the transducer
without causing discomfort. Ensure you
are using the correct belt. Adjust it as
necessary.
Fetal movement. Check the belt is correctly fastened (see
above) and adjust as necessary.
Reposition the transducer and reset the
Toco baseline if necessary.
Maternal respiration superimposed on
trace.
Check belt is not too loose.
Maternal movement/change of position. Following maternal movement, reset
Toco baseline.
Toco sensitivity is too high
(above 100 units).
Toco trace is exceeding the paper
scale.
Physical transmission of pressure from
the uterus to the sensor is much higher
than the average value.
The belt must be tight enough to ensure
good contact between the patient's skin
and the entire surface of the transducer
without causing discomfort. Ensure you
are using the correct belt. Adjust it as
necessary.Ensure a good contact
between the patient's skin and the entire
surface of the transducer. Reposition
transducer if necessary.
Ensure the belt is not too loose. The belt
must be tight enough to ensure good
contact between the patient's skin and
the entire surface of the transducer
without causing discomfort. Ensure you
are using the correct belt. Adjust it as
necessary.
Select 50% Toco sensitivity.
Toco EQUIP MALF is displayed. See the chapter “Patient Alarms and
INOPs” on page 73.
Toco UNPLUGGED is displayed. See the chapter “Patient Alarms and
INOPs” on page 73.
If you suspect the signal from the transducer. Test the Transducer (see “Testing Toco
Transducers” on page 132 below).