title: The effectiveness of simple drainage technique in improvement of cerebral blood flow in patients with chronic subdural hemorrhage.
abstract: OBJECTIVE
  In the present study, the clinical effectiveness of a surgical procedure in which no draining tubes are installed following simple burr hole drainage and saline irrigation is investigated.
  
  
  METHODS
  10 patients, having undergone operative intervention for unilateral chronic subdural hemorrhage, having a clinical grade of 2 and a hemorrhage thickness of 2 cm, were included in the study. The cerebral blood flow rates of middle cerebral artery were evaluated bilaterally with Doppler before and after the surgery. All the cases underwent the operation using the simple burr hole drainage technique without the drain and consequent saline irrigation. Statistical analysis was performed by Wilcoxon signed rank test (p<0.05).
  
  
  RESULTS
  There was a pronounced decrease in the preoperative MCA blood flow in the hemisphere the hemorrhage had occurred (p=0.008). An increased PI value on the side of the hemorrhage drew our attention (p=0.005). Postoperative MCA blood flow measurements showed a statistically significant improvement (p=0.005). Furthermore, the PI value showed normalization (p<0.05). The paresis and the level of consciousness improved in all cases.
  
  
  CONCLUSIONS
  Simple burr hole drainage technique is sufficient for the improvement of cerebral blood flow and clinical recovery in patients with chronic subdural hemorrhage.
authors.affiliation: Firat University, Neurosurgery, Elaziğ, Turkey. mtkaplan@yahoo.com.tr
authors.forename: Metin
authors.initials: M
authors.lastname: Kaplan
authors.forename: Fatih Serhat
authors.initials: FS
authors.lastname: Erol
authors.forename: Zülküf
authors.initials: Z
authors.lastname: Bozgeyik
authors.forename: Mehmet
authors.initials: M
authors.lastname: Koparan
mesh_terms: D000328:Adult; D000368:Aged; D002560:Cerebrovascular Circulation; D003399:Craniotomy; D004322:Drainage / Q000379:methods*; D005260:Female; D020200:Hematoma, Subdural, Chronic / Q000000981:diagnostic imaging* / Q000601:surgery*; D006801:Humans; D008297:Male; D020768:Middle Cerebral Artery / Q000502:physiology; D016896:Treatment Outcome; D017585:Ultrasonography, Doppler, Transcranial