Bionet FC-700 - Chapter 4. CTG Terminology

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Fetal Monitor FC-700 Operating Manual
Chapter 4. CTG Terminology
1) Baseline FHR
Mean FHR rounded to increments of 5 bpm during a 10 minute segment excluding periodic or
episodic changes, periods of marked variability and, segments of baseline that differ by >25bpm.
Duration must be ≥2 minutes.
2) ACCELERATION
Visually apparent abrupt increase(onset to peak is < 30sec) of FHR above baseline. Peak is
≥ 15 bpm. Duration is ≥ 15 bpm and <2 min. Peak of 10 bpm and duration 10sec is acceleration
3) LATE DECELERATION
Visually apparent gradual decrease( onset to nadir is ≥ 30 sec.) of FHR below baseline.
Return to baseline associated with a uterine contraction. Nadir of deceleration occurs after the
peak of the contraction. Generally, the onset, nadir and recovery of the deceleration occur
after same time as the onset, peak, and recovery of the contraction.