title: Chronic hydrocephalus that requires shunting in aneurysmal subarachnoid haemorrhage [a-SAH]: its impact on clinical outcome.
abstract: BACKGROUND
  Chronic hydrocephalus is a common occurrence following aneurismal subarachnoid haemorrhage [a-SAH] but its impact on neurological outcome has not been re reviewed systematically.
  
  
  METHODS
  One hundred and eleven patients were recruited from a prospectively collected a-SAH registry over a 3-year period between 2002 and 2004. Their 6-month extended Glasgow Outcome Scale [GOSE] scores were correlated with routine clinical data and the need for CSF shunting [chronic hydrocephalus that required shunting, CHS].
  
  
  RESULTS
  Thirty patients with CHS were identified and they were associated with an initial poor WFNS grading [median 4 versus 2, p = 0.028]. Among patients with poor WFNS grading, CHS was associated with a better GOSE [median 4 versus 2, p = 0.041] and among patients with good WFNS grading, CHS paradoxically was associated with a poor GOSE [median 3.5 versus 7, p = 0.016].
  
  
  CONCLUSIONS
  The relationships between CHS and GOSE in a-SAH were complex. Their true clinical significance requires a more in-depth prospective study.
authors.affiliation: Division of Neurosurgery, Department of Surgery, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong. wpoon@cuhk.edu.hk
authors.forename: W S
authors.initials: WS
authors.lastname: Poon
authors.forename: S C P
authors.initials: SC
authors.lastname: Ng
authors.forename: G K C
authors.initials: GK
authors.lastname: Wong
authors.forename: L Y C
authors.initials: LY
authors.lastname: Wong
authors.forename: M T V
authors.initials: MT
authors.lastname: Chan
mesh_terms: D000368:Aged; D002557:Cerebrospinal Fluid Shunts / Q000379:methods* / Q000706:statistics & numerical data; D005260:Female; D023261:Glasgow Outcome Scale; D006801:Humans; D006849:Hydrocephalus / Q000209:etiology* / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012720:Severity of Illness Index; D013345:Subarachnoid Hemorrhage / Q000150:complications* / Q000601:surgery; D016896:Treatment Outcome