CADENCE II Fetal Monitor User Manual
- 32 -
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) Acquiring FH Signal
Search for the location of the fetal heart using a stethoscope or a fetoscope.
Apply a certain amount of acoustic gel on the transducer and move it slowly around the fetus
site until a clear characteristic hoof-beat sound of the fetal heart is heard. Refer to figure 7-1
for the transducer position.
Figure 7-1 Ultrasound transducer & TOCO transducer positioning (single fetus)
3) Fixing the Transducer
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. Meanwhile, fetus heart sound is
heard clearly and the FHR trace and value are displayed on the screen.
CAUTION
:
Do not mistake the higher maternal heart rate for fetal heart rate.
NOTES:
1) The best quality records will only be obtained if the transducer is placed in the
optimum position.
2) Positions with strong placental sounds or umbilical blood flow sound should be
avoided.
3) If the fetus is in the cephalic position and the mother is supine, the clearest heart
sound will normally be found on the midline below the umbilicus. During examining,
the pregnant woman’s prolonged lying in the supine position should be avoided
owing to the possibility of supine hypotension. Sitting up or lateral positions are
preferable and may be more comfortable.
4) It is impossible to examine FHR unless an audible fetal heart signal is present. The
fetal pulse can be distinguished from the maternal pulse by feeling the mother’s
pulse during the examination.
Measure TOCO
Measure FHR