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Abstract
Subarachnoid haemorrhage is defined as presence of blood in the subarachnoid space. The rupture of an aneurysm is the most common cause of subarachnoid haemorrhage.
The main anaesthetic goals during cerebral aneurysm surgery are to facilitate surgery by creating good intraoperative conditions, to reduce the risk of intraoperative rupture of the aneurysm, to provide a quiet and stable awakening and to maintain an adequate cerebral perfusion.
Anaesthetic techniques based on intravenous anaesthetics, as opposed to inhalational agents, are becoming increasingly popular for neurosurgery. Isoflurane and propofol are widely used for anaesthesia during intracranial surgery. Both drugs reduce the cerebral metabolic rate for oxygen. Although isoflurane reduces the cerebral metabolic rate for oxygen dose-dependently, it-maintains or increases cerebral blood flow.