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Oxytocin challenge test for antepartum fetal assessment

Report of a clinical experience
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      OCT’s were performed 1,209 times on 533 fetuses at risk for UPI. OCT interpretation was negative for 72% of tests, and there were no fetal deaths within a week following a negative test. Our data thus support the concept that the use of the OCT for fetal surveillance most frequently justifies a course of nonintervention. Of 69 fetuses with a positive test, 47 were subjected to the stresses of labor with maternal hyperoxygenation and lateral positioning. Twenty of these 47 (43%) tolerated labor without biophysical evidence of distress. Reactivity of the FHR, when present during a positive test, significantly increased the likelihood that a fetus would tolerate labor. The fetal and perinatal mortality rates in the patients identified as at risk for UPI and studied with OCT’s were no greater than in a comparable group of pregnancies without identifiable risk for UPI and not studied with OCT’s.
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