title: Results of single burr hole drainage for acute subdural hematoma with non-reactive pupil.
abstract: OBJECTIVE
  To investigate the effects of emergency burr hole drainage for acute subdural hematoma (ASDH) with bilateral non-reactive pupils.
  
  
  METHODS
  A retrospective study was conducted by reviewing medical records from 1998 to 2007. Patients meeting the following criteria were included: 1) head injury with unconsciousness (Glasgow Coma Scale score 8); 2) bilateral non-reactive pupils on arrival; 3) ASDH with disappearance of basal cistern on computed tomography (CT); and 4) performance of emergency single burr hole drainage. Subjects were divided into survival and non-survival groups.
  
  
  RESULTS
  Pupil size on the small side was significantly smaller in the survival group than in the non-survival group. All pupils on the small side in the survival group were 4 mm.
  
  
  CONCLUSIONS
  Emergency burr hole drainage should still be considered in patients with ASDH showing bilateral non-reactive pupils and one pupil 4 mm.
authors.affiliation: Juntendo University, Emergency and Disaster Medicine, Bunkyo-ku, Japan. yyanaga@juntendo.ac.jp
authors.forename: Youichi
authors.initials: Y
authors.lastname: Yanagawa
authors.forename: Toshihisa
authors.initials: T
authors.lastname: Sakamoto
mesh_terms: D000328:Adult; D003399:Craniotomy / Q000379:methods* / Q000401:mortality; D004322:Drainage / Q000379:methods*; D005260:Female; D015600:Glasgow Coma Scale; D020199:Hematoma, Subdural, Acute / Q000401:mortality / Q000601:surgery*; D006801:Humans; D008297:Male; D008588:Meningocele / Q000401:mortality / Q000601:surgery*; D008875:Middle Aged; D011681:Pupil Disorders / Q000401:mortality / Q000601:surgery; D012189:Retrospective Studies; D016019:Survival Analysis; D016896:Treatment Outcome