SAH or intraparenchymal clot on CT scan was seen in 43 (83%) patients in group 1 and 51 (89%) patients in group 2. Six (11%) patients in group 1 and 11(19%) patients in group 2 developed hydrocephalus following surgery and required a CSF shunt. Varying degrees of brain swelling was encountered at surgery in 52 patients, 30 in group 1 and 22 in group 2. In most of the patients brain swelling could be controlled with a combination of CSF drainage, diuretics and controlled hyperventilation. Severe brain swelling, requiring brain resection, was encountered in 3 patients in each group. One patient in group 2 required intra operative ventricular tapping. However in no case surgery had to be abandoned in either group.