Table 1 Abnormal CTG trace eligible for further evaluation by fetal scalp blood sampling
Consistent with hospital, national and international guidelines [14, 16, 39] an abnormal CTG trace eligible for further evaluation by FBS is defined as: | |
|---|---|
One or more of | ● Baseline FHR <100 beats per minute (bpm) or >170 bpm |
● Variability absent or <3 bpm | |
● Prolonged deceleration (>90s and <5 min) | |
● Late decelerations | |
● Complicated variable decelerations | |
Both of | ● Baseline FHR between 100-109 or 161-170 |
● Baseline FHR variability 3-5 bpm for > 40 mins | |