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"FHR2/DFHR: -20bpm": the FHR2/DFHR trace is 20bpm lower than it really is.
"FHR2/DFHR: +20bpm": the FHR2/DFHR trace is 20bpm higher than it really is.
7.3 Monitoring Uterine Activity Externally
7.3.1 Parts Required
1. TOCO transducer
2. Belt
7.3.2 TOCO Monitoring Procedure
1) Placing Transducer Belt
Place the transducer belts across the bed, ensuring that the belt will be around the patient's
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
Wipe away any gel remaining on abdomen around this area.
Place the TOCO transducer on the patient's abdomen on the uterine fundus.
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 and
comfortably.
3) Adjusting the Numeric Value to Zero
Press the AUTO ZERO button to adjust the numeric value to the baseline. Make sure this is
not done during a contraction.
The uterine activity reading at this point should be 30 ~ 90. A flat-top aligned with 100 on
the TOCO scale indicates the belt is too tight, and needs adjustment.
NOTE:
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.
7.3.3 Changing UA Baseline
The UA baseline can be changed.
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Chapter 7: Fetal Monitoring
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