User's Manual

F Series Fetal & Maternal Monitor User Manual Fetal Monitoring
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7.2.2 FHR Monitoring 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) Determining the Transducer Position
- Determine the fetal position using Leopold’s maneuvers.
- Search for the location of the fetal heart using a stethoscope or a fetoscope. The best fetal
heart signal can be obtained through the fetal back.
- Place the transducer below the navel for head presentation and place the transducer above the
navel for breech presentation.
- During parturition, the fetal heart moves downward as the labor progresses. It is
recommended to move the transducer along with the fetus.
Figure 7-1 Positioning Ultrasound Transducer (single fetus)
3) Acquiring Fetal Heart Signal
Apply a certain amount of acoustic gel on the transducer and move the transducer slowly around
the fetus site to even the gel. The best fetal heart signal can be obtained through the fetal back.
Find at least 2 or 3 sites, and choose the one where the clearest, most sonorous and steady fetal
heart sound is heard. When the transducer is connected correctly and communicated well, the
fetal heart signal indicator is full. If the signal is poor, the signal indicator shows as it is and no
FHR data are displayed. When you move the transducer on the abdomen, adjust the speaker
volume so that it can be clearly heard.
4) Fixing the Transducer
When you find clearest and most steady fetal heart sound, wrap the abdomen with the belt over
the transducer. Fix the transducer by pushing its buckle through the overlapping section of the
belt.
Fetal Heart
Pregnancy
Early Parturition
Late Parturition