10 Monitoring FHR and FMP Using Ultrasound
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fetuses are monitored, the Avalon will identify and label apparent CCV between either two fetuses or a
fetus and the mother.
Avalon CCV numeric display and recorded trace showing coincident alerts
When monitoring the maternal ECG, a beat-to-beat maternal heart rate trace is printed alongside the
FHR recorded trace. When monitoring the maternal SpO
2
derived pulse rate, a filtered and averaged
heart rate trace is printed.
Examples of Artifacts
Following are recorded trace examples of complaints received regarding inaccurate output from the
Avalon monitors. Scaling is 3 cm/min and 30 bpm/cm.
1 FHR1
2 Pulse
3 FHR1 Pulse
Double-Counting
Baseline Rate 120
Baseline Variability Moderate
Accelerations Present
Decelerations Not apparent
Contractions Excessive, coupling, hypertonus
Artifact Double-Counting
Comment Reassuring tracing. The excessive uterine activity
should prompt discontinuation of any oxytocic
agent.
Remediation The true fetal rate can be confirmed by
auscultation or by fetal scalp electrode.
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