Subarachnoid hemorrhage

Subarachnoid hemorrhage commonly results from rupture of a cerebral aneurysm. Patients presenting with large subarachnoid hemorrhages or poor clinical grades are at high risk of development of intracranial hypertension. The benefits of ventricular catheter placement in these patients is twofold. It allows accurate medical treatment of increased intracranial pressure and drainage of cerebrospinal fluid. The latter is important because of the high incidence of acute hydrocephalus associated with large blood loads and intraventricular blood clots. It is important not to overdrain the cerebrospinal fluid and acutely lower intracranial pressure since, rarely, these actions may precipitate rebleeding from unclipped cerebral aneurysms. Catheters are often left in place for several days postoperatively until normal cerebrospinal fluid circulation and absorption has been re-established.

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