RCOG cardiotocographic (CTG) classification

1
RCOG cardiotocographic (CTG) classification

• Normal
• A CTG where all four features fall into the
  reassuring category.
• Suspicious
• A CTG whose features fall into one of the
  non-reassuring categories and the remainder of
  the features are reassuring.

2
RCOG cardiotocographic (CTG) classification

• Pathological
• A CTG whose features fall into two or more
  non-reassuring categories or one or more abnormal
  categories.

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Features of CTG
Fetal Heart rate feature classification Baseline (bpm) Variability (bpm) Decelerations Accelerations
Reassuring 110 - 160 5 None Present Absence of accelerations with otherwise normal CTG is of uncertain significance
Non-reassuring 100 109 110 - 160 lt5 for 40 but lt90 min early Variable Single prolonged for up to 3 minutes
Abnormal lt100 gt180 Sinusoidal pattern for 10 minutes lt5 for gt90 minututes atypical Late Single prolonged for gt3 minutes