[The insulin test].
Since its introduction through Hollander 30 years ago the interpretation of the value of the insulin test following vagotomy have been discussed. For the individual patient no correlation between the incidence of ulcer recurrence and the result of the insulin test has been found. In addition, the risk of hypoglycemia seems to be too high for diagnostic purposes. Therefore, to evaluate the outcome after vagotomy basal acid output, pentagastrin stimulated acid secretion and endoscopy are emphasized as reliable methods.