title: A comparison of the Glidescope® to the McGrath® videolaryngoscope in patients.
abstract: BACKGROUND
  The Glidescope® videolaryngoscope is a new device for tracheal intubation that provides an improved view of the larynx. This study was performed to compare the Glidescope with the McGrath videolaryngoscope in terms of time to intubation (TTI) and number of attempts.
  
  
  METHODS
  Patients were randomly allocated to one of two groups, Glidescope or McGrath group, by using computer-generated numbers. Tracheal intubation was attempted by an anesthesiologist with extensive experience using these two devices. The operator recorded ease of visualization of glottic structures based on the classification described by Cormack and Lehane. Number of failures, number of attempts and their duration, total intubation time, and events during the whole procedure were recorded. The duration of one attempt was defined as the time elapsed between picking up the endotracheal tube and verification of tracheal intubation with visualization of three expiratory carbon dioxide waveforms. TTI was defined as the sum of the duration of all intubation attempts (as many as three), excluding preoxygenation procedures.
  
  
  RESULTS
  TTI was significantly shorter for the Glidescope® compared to the McGrath® laryngoscope (40.5 vs. 53.3 s, respectively, P < 0.05). However, glottic views obtained at intubation were similar between the two groups. Number of intubation attempts was not significantly different between the two groups (1.03 ± 0.19 vs 1.10 ± 0.32, respectively) (mean ± SD).
  
  
  CONCLUSIONS
  Study results demonstrated that the Glidescope reduced total intubation time in comparison with the McGrath, in terms of TTI in patients with normal airways.
authors.affiliation: Department of Anesthesiolgy and Pain Medicine, Guri Hospital, College of Medicine, Hanyang University, Guri, Korea.
authors.forename: Woo Jae
authors.initials: WJ
authors.lastname: Jeon
authors.forename: Kyoung Hun
authors.initials: KH
authors.lastname: Kim
authors.forename: Jong Hoon
authors.initials: JH
authors.lastname: Yeom
authors.forename: Mi Rang
authors.initials: MR
authors.lastname: Bang
authors.forename: Jin-Bum
authors.initials: JB
authors.lastname: Hong
authors.forename: Sang Yun
authors.initials: SY
authors.lastname: Cho