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Philips FM20/30 Instructions For Use Manual Page 156

Release j.3 with software revision j.3x.xx patient monitoring.
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11 Monitoring FHR and FMP Using Ultrasound
Maternal-Switching (Maternal Insertion)
Baseline Rate
Baseline Variability
Accelerations
Decelerations
Contractions
Artifact
Comment
Remediation
Noisy/Erratic Signal and Dropout
Baseline Rate
Baseline Variability
Accelerations
Decelerations
Contractions
Artifact
Comment
Remediation
Selection of Literature References on Artifacts
___________________________________________________________
Fetal Monitoring, A Multidisciplinary Approach, Seventh edition
Susan M. Tucker, Lisa A. Miller, David A. Miller
Mosby Inc. 2009, ISBN 978-0-323-08352-2
___________________________________________________________
156
170 - Tachycardia
Moderate
Unable to determine
Absent
Absent
Maternal insertion, noise
The fetus has an elevated baseline rate of about 170 bpm with minimal to moderate
variability. The ability to assess fetal status is limited because about half of the tracing
displays the maternal heart rate.
The application of a maternal transducer (ECG or pulse oximeter) will likely resolve any
possible confusion with the tracing. Repositioning the transducer may produce a more
reliable tracing. Consideration must also be given to applying a fetal scalp electrode.
140
Moderate
Present
Absent
Minimal
Noisy signal, drop-out
Reassuring tracing. Note that there is episodic drop out of the signal with discontinuity of the
fetal tracing.
Either improving the position of the transducer or the application of a fetal scalp electrode
will reduce the amount of artifact in the tracing.

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