Management of malignant hyperthermia susceptible parturients.

The management of eleven women susceptible to malignant hyperthermia during twenty deliveries is presented. These women were managed over a six-year period following guidelines that were established in 1990. Initial problems identified were the management of labour and caesarean section, the use of sympathomimetics and potential problems for the newborn, viz placental transfer of drugs and the possibility of a stress-induced malignant hyperthermia reaction in the newborn. There was little evidence that the stress of labour produced hypermetabolic responses in either mother or neonates and the use of sympathomimetics increased throughout the six-year period with no evidence of adverse effects. A caesarean section using general anaesthesia was not required but the management of this situation is described in both the protocol and discussion sections of this paper.