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Comparison of thiopentone versus althesin for caesarean section.

Thiopentone and Althesin were compared in 50 patients undergoing general anaesthesia for Caesarean section. The patients were divided into group A (24 mothers) were thiopentone (3.5 mg/kg) was used for induction and group B (26 mothers) where Althesin (80 mu1/kg) was employed. Blood samples for estimating the maternal and umbilical venous and arterial blood pH, pCO2, BD and pO2 were taken at the time of delivery. The clinical condition of the newborn were estimated by the Apgar score. Postoperatively the mothers were interviewed about thei subjective opinion concerning the anaesthesia. The interview showed equal acceptance of both induction agents. The umbilical venous and arterial pH, pCO2 and BD were well within the normal physiological range and there was no significant intergroup difference. The only significant differences were the lower umbilical venous and arterial pO2 values in the Althesin group. The clinical condition of the newborn (Apgar score) showed no significant difference between the two groups.