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Screening tool to assess the fetal state of oxygenation and predicts early signs of hypoxia and fetal distress.
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Stimulus: Contractions/ fetal movements Baseline fetal heart rate Baseline variability Accelerations Decelerations
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baseline heart rate
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Baseline variability Classification: Silent 0-5 bpm Reduced 6-10 bpm Normal 11-25 bpm Saltatory >25 bpm
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accelerations
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Deceler ations:
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Decelerations Types:
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Basal fetal oxygenation. The relationship of late decelerations to baseline fetal oxygenation during contractions
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Contraction Stress Test
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Signature + Date & Time
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DEFINEDEFINE RISKRISK CONTRACTIONSCONTRACTIONS BASELINEBASELINE RATERATE VARIABILITYVARIABILITY ACCELERAT’NACCELERAT’N DECELERAT’NDECELERAT’N OVER ALL ASSESS MENT
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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
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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
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Baseline heart rate 170 bpm Variability 40 min Recurrent decelerations of any type Severe variable or late decelerations A sinusoidal pattern Any of the following:
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