title: [Efficacy of Glidescope video laryngoscope in difficult airways: a meta-analysis of randomized controlled trials].
abstract: BACKGROUND
  Increased evidence indicates that the Glidescope video laryngoscope (GVL) is useful for difficult tracheal intubations. The aim of this meta-analysis was to assess the efficacy of the GVL in difficult tracheal intubations, comparing with that of Macintosh laryngoscopy.
  
  
  METHODS
  The systematic search, data extraction, critical appraisal, and pooled analysis were performed according to the PRISMA statement. The relative risk (RR), mean difference (MD), and their corresponding 95% confidence intervals (CIs) were calculated by the Comprehensive Meta-analysis version 2.2.040 software for dichotomous and continuous outcomes, respectively.
  
  
  RESULTS
  Fifteen randomized controlled trials including 860 tracheal intubations by GVL and 860 tracheal intubations by Macintosh laryngoscopy. GVL showed higher success rate (RR 1.065, 95% CI 1.017-1.117, P < 0.008) than does the Macintosh laryngoscope, whereas no difference was found in the duration for instrumentation.
  
  
  CONCLUSIONS
  Our meta-analysis showed that GVL has an advantage over Macintosh laryngoscope in respect to the success rate for difficult tracheal intubations.
authors.affiliation: Department of Anesthesiology, International University of Health and Welfare, Nasushiobara 329-2763.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Hirabayashi
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Hoshijima
authors.forename: Norifumi
authors.initials: N
authors.lastname: Kuratani
mesh_terms: D006801:Humans; D007442:Intubation, Intratracheal / Q000295:instrumentation*; D020704:Laryngoscopes; D016032:Randomized Controlled Trials as Topic