Abstract
In 393 cases of cerebral aneurysm operations from 1971 to 1973, the cases in which operation was performed within the first week after SAH had the highest mortality. However a closer analysis of these cases in the first week revealed that the results of surgery were significantly different by each day. The first day showed neither poor results nor deaths. The worst day was the third. To clarify such differences, we report studies of the results of surgery within the first four days after SAH in 31 cases.
