Chinese expert consensus on the management of aneurysmal subarachnoid hemorrhage-related hydrocephalus

According to fluid dynamics, aSAH-H is divided into communicating and obstructive hydrocephalus; according to the time of occurrence, it is divided into acute (≤ 3 days) and chronic hydrocephalus (> 3 days) [3]; according to the progress of the disease, it is divided into progressive and arrested hydrocephalus; and according to intracranial pressure, it is divided into high pressure and normal pressure hydrocephalus. Hydrocephalus often leads to cognitive impairment and neurological damage which hinder recovery. [...]intracranial hypertension caused by acute hydrocephalus may induce fatal cerebral hernia [7]. Pathophysiology of aSAH-H is complex, and there is no standard diagnostic criteria and treatment protocol in China and abroad currently; there is also no consensus among clinicians on whether active treatment is needed and what treatment is preferred on aSAH-H. [...]diagnosis and treatment of aSAH-H have been puzzled by the unclarity and inconsistency of standards. [...]increased production, decreased absorption, and circulatory disturbance of CSF are important pathogenesis of aSAH-H.