Tip 95: CTG – pathological

A pathological CTG is one in which ≥2 non-reassuring or ≥1 abnormal features are present.

Abnormal features are:

  • Baseline HR <100bpm, >180bpm, or a sinusoidal pattern for ≥10 mins
  • Variability <5bpm for 90 mins
  • Single prolonged deceleration >3 mins
  • Atypical variable decelerations in >50% of contractions or late decelerations, both for <30 mins

Reference: NICE intrapartum care – National Institute for Health and Care Excellence (2014). Intrapartum care. CG190. London:  NICE.

Previously published: 28/04/14, 09/04/15

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