Neonatal neurobehavioral tests following cesarean section under general and spinal anesthesia.

The Scanlon Group of Early Neonatal Neurobehavioral Tests (E.N.N.S.) was administered to 150 babies delivered by elective cesarean section. Fifty of the mothers were induced into general anesthesia with thiopental, 4 mg. per kilogram, and 50 with ketamine, 1 mg. per kilogram. Fifty mothers received spinal anesthesia with 6 to 8 mg. of tetracaine. All mothers receiving spinal anesthesia were given 100 per cent oxygen by a transparent face mask and all undergoing general anesthesia received N2O-O2 (6L:6L) until delivery of the baby. All mothers were healthy and all babies weighed 2,500 grams or more, were apparently normal, and had Apgar scores of 7 or more at one minute to 10 at five minutes. Spinal anesthesia was associated with the greatest percentage of high scores on both the first and second day for overall assessment, pinprick response, tone, rooting, sucking. Moro response, placing, alertness, and total decrement (habituation) scores. There was a statistically significant difference between all the scores for spinal compared to the other two groups. The scores were lowest following a thiopental induction and intermediate with ketamine although the difference did not reach statistical significance.