[Postoperative complications in neurosurgery].

Hemorrhage, ischemia and ischemic edema are among the complications which may occur following neurosurgery and they represent the most frequent cause of neurological deterioration. The mechanisms predisposing vascular complications (hemorrhage, ischemia) are described and discussed in relation to systemic alterations associated with surgery and anesthesia. In addition, the physiopathology of these complications is discussed in the various pathologies: cancer, vascular malformations, trauma and the intra-operative diagnostic possibilities which prevent their onset.