Use of Continuous Electronic Fetal Monitoring in a Preterm Fetus: Clinical Dilemmas and Recommendations for Practice
Table 1
Categorizing individual features of CTG according to NICE guidelines.
Feature
Baseline (bpm)
Variability (bpm)
Decelerations
Accelerations
Reassuring Nonreassuring
110–160 100–109 161–180
>5 <5 for 40–90 minutes
None Typical variable decelerations with >50% of contractions for over 90 minutes. Single-prolonged deceleration for up to 3 minutes.
Present The absence of acceleration with otherwise normal trace is of uncertain significance
Abnormal
<100 >180 Sinusoidal pattern >10 minutes
<5 for 90 minutes
Either atypical variable decelerations with >50% of contractions or late decelerations, both for over 30 minutes. Single-prolonged deceleration for more than 3 minutes.