title: No effect of recumbency duration on the occurrence of post-lumbar puncture headache with a 22G cutting needle.
abstract: BACKGROUND
  Supine recumbence has been widely performed to prevent post-lumbar puncture headache (PLPH). However, the optimal duration of supine recumbence is controversial. The aim of the study is to compare the occurrence of PLPH according to the duration of supine recumbence in patients with neurological disorders.
  
  
  METHODS
  A non-equivalent control/experimental pre-/post-test study design was used. Seventy consecutive patients were prospectively enrolled between July 2007 and July 2008. Thirty-five patients underwent supine recumbence for four hours after lumbar puncture (Group 1) and 35 patients underwent supine recumbence for one hour (Group 2).
  
  
  RESULTS
  The overall frequency of PLPH was 31.4%. The frequency of PLPH was not significantly different between the Group 1 (28.6%) and Group 2 (34.3%) (P = 0.607). In patients with PLPH, the median severity (P = 0.203) and median onset time of PLPH (P = 0.582) were not significantly different between the two groups. In a logistic regression analysis, the previous history of post-lumbar puncture headache was a significant risk factor for the occurrence of PLPH (OR = 11.250, 95% CI: 1.10-114.369, P = 0.041).
  
  
  CONCLUSIONS
  Our study suggests that short duration (one hour) of supine recumbence may be as efficient as long duration (four hours) of supine recumbence to prevent PLPH.
authors.affiliation: Department of Nursing, Asan Medical Center, Seoul, South Korea.
authors.forename: Sung R
authors.initials: SR
authors.lastname: Kim
authors.forename: Hyun S
authors.initials: HS
authors.lastname: Chae
authors.forename: Mi J
authors.initials: MJ
authors.lastname: Yoon
authors.forename: Jung H
authors.initials: JH
authors.lastname: Han
authors.forename: Kwang J
authors.initials: KJ
authors.lastname: Cho
authors.forename: Sun J
authors.initials: SJ
authors.lastname: Chung
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D056888:Patient Positioning / Q000379:methods*; D051299:Post-Dural Puncture Headache / Q000209:etiology / Q000517:prevention & control*; D011187:Posture; D011446:Prospective Studies; D013129:Spinal Puncture / Q000009:adverse effects* / Q000379:methods*; D013997:Time Factors