[Hyponatremia and convulsions in the postoperative period in children].

Four children undergoing surgery presented with seizures and hyponatremia 12 hours after anesthesia. One child died with cerebral oedema, the others recovered. The respective roles of hypo-osmolar perfusions and ADH secretion are discussed. Ionogram before surgery, supervision of weight and diuresis and correct fluid management should prevent these postoperative complications.