Visceral pain during caesarean section: effect of varying dose of spinal amethocaine.

Abstract

The aim of this study was to determine how varying the dose of spinal amethocaine influences the incidence of visceral pain associated with exteriorization of the uterus after delivery. In a double-blind study, we examined the incidence of visceral pain in 40 parturients undergoing Caesarean section under spinal anaesthesia with amethocaine 8, 10, 12 or 14 mg in 2 ml of 5% glucose. The dose of spinal amethocaine was found to influence the incidence of visceral pain associated with exteriorization of the uterus after delivery. The incidence of visceral pain was lower in the 12-mg (P < 0.05) and 14-mg (P < 0.01) groups than in the 8-mg group, although there were no differences in maximum spread of analgesia and circulatory changes between the four groups. This study suggests that a slightly higher dose of spinal amethocaine (12-14 mg) is preferable for Caesarean section.