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 heart rate

Baseline variability

Classification:

Silent 0-5 bpm

Reduced 6-10 bpm

Normal 11-25 bpm

Saltatory >25 bpm

accelerations

Deceler

ations:

Decelerations Types:

Basal fetal oxygenation. The relationship of late decelerations to baseline fetal oxygenation during contractions

Contraction Stress Test

Signature +

Date & Time

DEFINE

RISK

CONTRACTIONS

BASELINE

RATE

VARIABILITY

ACCELERAT’N

DECELERAT’N

OVER ALL ASSESSMENT

• 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

• Baseline heart rate < 100 bpm or > 170 bpm

• Variability < 5 bpm for > 40 min

• Recurrent decelerations of any type

• Severe variable or late decelerations

• A sinusoidal pattern

Any of the following: