CADENCE II Fetal Monitor User Manual
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7.5 Monitoring Uterine Activity (UA) Externally
7.5.1 Parts Required
1) TOCO transducer 2) Belt
7.5.2 Operation Procedure
1) Placing Transducer Belt
Place the transducer belts across the bed, ensuring that the belt will be around the abdomen
when it is fastened. Lay the patient on the bed.
Alternatively, the patient can take a sitting position. Arrange the belt around her abdomen.
2) Fixing the Transducer
Refer to figure 7-1 for the TOCO transducer position. Wipe off any gel remaining on
abdomen around this area.
Place the transducer on the patient’s fundus to get optimum recording of uterine activity.
Wrap the abdomen with the belt over the transducer. Fix the transducer by pushing its buckle
through the overlapping section of the belt. Make sure the belt fits the patient snugly but
comfortably.
3) Adjust the Value to Zero
Press the AUTO ZERO key to adjust the value to the baseline. Make sure this is not done
during a contraction.
The uterine activity reading at this point should be 30 ~ 90. If the numeric exceeds this range,
it indicates the belt is too tight or too loose. The too tight belt may cause a flat-top aligned
with 100 on the TOCO scale, and the transducer would slide if the belt is too loose. You
need to adjust it.
NOTES:
1) Do not apply aquasonic coupling gel on a TOCO transducer or its contact area.
2) Check the function of the TOCO transducer by applying pressure on it to see if this
is displayed on the screen.
7.5.3 Changing the UA Baseline
1 Press the SETUP key three times to open the Fetal Monitor Configuration menu.
2 Press the UP key or DOWN key to move the cursor to UABaseline; press the CHANNEL
key.
3 Press the UP key or DOWN key to choose the baseline from 5, 10 (default), 15 and 20.
4 Press the CHANNEL key to confirm selection.
5 Press the AUTO key to exit.
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