title: Burr-hole versus twist-drill drainage for the evacuation of chronic subdural haematoma: a comparison of clinical results.
abstract: BACKGROUND
  Most neurosurgeons remove clinically symptomatic subdural haematomata, but the techniques they choose remain controversial.
  
  
  METHODS
  The results from sixty-two patients diagnosed with chronic subdural haematoma were evaluated for technique, postoperative computerized tomography (CT) scan results, and complications.
  
  
  RESULTS
  Eleven patients had haematomata evacuated using twist-drill plus drain, 37 patients had haematomata evacuated with burr-hole only, and 14 patients were evacuated with burr-hole plus drain. Of the patients who underwent twist-drill and closed system drainage (CSD), 43% had smaller lesions on CT follow-up scans, as compared with 74% of those who underwent the burr-hole only procedure, and 65% with burr-holes with drains. Clinical outcome results showed that 64% of twist-drill and CSD patients deteriorated as compared with 16% of those with burr-hole only and 7% with burr-holes and CSDs. Sixty-four per cent of twist-drill patients required repeat evacuations as compared with 11% of those with burr-holes only, and 7% with burr-holes plus drains.
  
  
  CONCLUSIONS
  The results at our institution indicate that burr-hole evacuation for chronic subdural haematoma is superior to twist-drill evacuation with respect to clinical outcomes and complications.
authors.affiliation: Department of Neurosurgery, University Health Sciences Center, Louisiana State University, 1501 Kings Highway, Shreveport, LA 71130-3932, USA.
authors.forename: G R
authors.initials: GR
authors.lastname: Williams
authors.forename: M K
authors.initials: MK
authors.lastname: Baskaya
authors.forename: J
authors.initials: J
authors.lastname: Menendez
authors.forename: R
authors.initials: R
authors.lastname: Polin
authors.forename: B
authors.initials: B
authors.lastname: Willis
authors.forename: A
authors.initials: A
authors.lastname: Nanda
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D003399:Craniotomy / Q000295:instrumentation / Q000379:methods*; D004322:Drainage / Q000295:instrumentation / Q000379:methods; D005260:Female; D020200:Hematoma, Subdural, Chronic / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D016896:Treatment Outcome