RESUMENObjetivos: Determinar las complicaciones que se presentan en el periodo preoperatorio, intraoperatorio y postoperatorio de los pacientes operados de aneurisma cerebral roto en el intraoperatorio: rotura del saco aneurismático (31.34%), disección difícil (53.73%); postoperatorio: isquemia cerebral tardía (26.86%), clipaje inadvertido de la arteria pericallosa o rama temporal y/o frontal de la cerebral media (7.46%), infarto cerebral distal (10.44%), neumonía intrahospitalaria 29 (43.28%), hemiparesia (25.37%), hemiplejia (11.94%), afasia, disartria (22.38%) y desorden hidroelectrolítico (85.07%). Recomendaciones: Proceder a cirugía entre el 4to y 10mo día, que son considerados días "prohibidos". were between 45 and 65 years of age (52.23%), 49.25% subsequent communicator aneurysms, 29.85% middle cerebral aneurysms, 13.43% anterior communicator aneurysms, 24.37% global vasospasm, 7.46% hydrocephalus, 50.74% intrahospital pneumonia (NIH), 22.38% language problems and 35.82% (24 cases) were operated between the 4th and 10th day. Conclusion: More women than men suffer from this disease. Complications: presurgical: rebleeding (13.43%), vasospasm (22.38%), inhospital pneumonia (10.44%); intraoperative: rupture of the aneurysmal sac (31.34%), difficult dissection (53.73%); postoperative: late cerebral ischemia (26.86%), inadvertent clipping of the pericallose artery or temporal and / or frontal branch of the middle cerebral (7.46%), distal cerebral infarction (10.44%), intrahospital pneumonia 29 (43.28%), hemiparesis ( 25.37%), hemiplegia (11.94%), aphasia, dysarthria (22.38%) and hydroelectrolytic disorder (85.07%). Recommendation: Proceed to surgery between the 4th and 10th day, which are considered "forbidden" days.