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Comparison of neonatal outcome in women with severe pre-eclampsia undergoing caesarean section under spinal or general anaesthesia.

Ideal method of anaesthesia during caesarean section in women with severe pre-eclampsia is difficult to decide. The aim and objective of the study were to compare neonatal outcome in women with severe pre-eclampsia, undergoing caesarean section in intrapartum period, either under general or spinal anaesthesia. Women with severe pre-eclampsia, undergoing caesarean section in intrapartum period, were included in the study. Diastolic blood pressure was kept below 100mm Hg by giving parenteral labetalol pre-operatively. All women received prophylactic magnesium sulphate (5g IV and 10g IM). Maternal blood- gas parameters were measured. Scalp blood pH estimation was done in all cases. Women undergoing caesarean section were randomised into two groups and received either spinal or general anaesthesia. Umbilical arterial catheterisation was done for collecting blood for estimating neonatal blood- gas parameters. Complete data was available in 82 women. Both the groups were comparable in terms of general demographic data, except that percentage of women having an induced labour was significantly more in the general anaesthesia group. Induction of anaesthesia and delivery interval was prolonged for the spinal group. Mean dose of phenylephrine was significantly higher for the spinal anaesthesia group. Preoperative maternal blood-gas parameters and foetal scalp blood pH were comparable in between groups. Difference in neonatal umbilical artery base deficit in between groups was not statistically significant (p = 0.99). Correlation coefficient between maternal base deficit and foetal base deficit was 0.414 (p = 0.01) and 0.06 (p > 0.1) respectively for general and spinal anaesthesia. Subgroup analysis in the population with pre-operative scalp blood pH < 7.2, neonatal umbilical artery base deficit was significantly higher in general anaesthesia group. Five minutes APGAR score was comparable but resuscitation at birth was more common in the general anaesthesia group. Correlation coefficient between maternal base deficit and foetal base deficit in this subgroup was 0.42 (p = 0.05) and -0.57 (p < 0.05) respectively for general and spinal anaesthesia.