The 109 patients who underwent surgical clipping were divided into two groups. Division into eithergroup was decided solely by the fact whether the patient underwent emergency surgery or not -which in turn was decided by the fact that whether the treating surgeon was operating in emergency (VSM) or not (AV, VPS, RP). Age, sex, neurological status and presence of medical illness like diabetes mellitus or hypertension did not influence the division of patients into two groups.