Screening tool to assess the fetal state of oxygenation and predicts early signs of hypoxia and fetal distress.
• Stimulus: Contractions/ fetal movements
• Baseline fetal heart rate
• Baseline variability
• Accelerations
• Decelerations
Baseline variability
Classification:
Silent 0-5 bpm
Reduced 6-10 bpm
Normal 11-25 bpm
Saltatory >25 bpm
Basal fetal oxygenation. The relationship of late decelerations to baseline fetal oxygenation during contractions
• Baseline Rate 110-150 bpm
• Amplitude of baseline variability 5/10-25 bpm
• Absence of decelerations, except for fleeting& short
• Presence of 2 or more accelerations during a 20 min period
• Baseline rate of 150-170 bpm/ 100-110 bpm
• Amplitude of variability bn 5-10 bpm > 40 min
• Increased variability above 25 bpm {saltatory}
• Absence of accelerations for > 40 min
• Sporadic decelerations of any type, unless severe