Hyponatraemia in children with febrile convulsions

In a study of 23 children admitted to hospital with a febrile convulsion, mild hyponatraemia was found on 8 occasions. In 6 of these cases there was evidence of inappropriate secretion of antidiuretic hormone. The hyponatraemia is unlikely to be the cause of the convulsion, but probably predisposes the child to a subsequent convulsion during the same febrile illness.