title: Comparison of the GlideScope video laryngoscope and Macintosh laryngoscope in simulated tracheal intubation scenarios.
abstract: OBJECTIVE
  To compare the GlideScope video laryngoscope (GVL) with the classic Macintosh laryngoscope in simulated airway scenarios of varying difficulty.
  
  
  METHODS
  A prospective, crossover and randomised study was performed. Four airway scenarios were simulated using the Airsim model as follows: normal; cervical spine immobilisation; tongue oedema and combined cervical spine immobilisation with tongue oedema. Emergency physicians performed tracheal intubations using both devices in each of the scenarios. The time required to intubate, the success rate and the number of intubation attempts were recorded. At the end of each scenario, participants scored vocal cord visualisation using the percentage of glottic opening (POGO) visible and the subjective ease of intubation on a visual analogue scale (VAS).
  
  
  RESULTS
  All 25 participants successfully completed the study. There was no difference in the time required for successful tracheal intubation using the GVL compared with using the Macintosh laryngoscope in the four airway scenarios. Only one participant failed to intubate the trachea with the Macintosh laryngoscope for the combined scenario. There was a significant increase in POGO when using the GVL in the cervical spine immobilisation group (p = 0.027). The VAS score of the subjective ease of intubation was lower for the GVL than for the Macintosh laryngoscope device in difficult scenarios but this difference was not significant.
  
  
  CONCLUSIONS
  This study suggests that the GVL could be an option for airway management even by emergency physicians with little experience and no training in its use.
authors.affiliation: Department of Emergency Medicine, Yonsei University College of Medicine, 250 Seongsanno, Seodaemun-gu, 120-752 Seoul, Republic of Korea.
authors.forename: H J
authors.initials: HJ
authors.lastname: Kim
authors.forename: S P
authors.initials: SP
authors.lastname: Chung
authors.forename: I C
authors.initials: IC
authors.lastname: Park
authors.forename: J
authors.initials: J
authors.lastname: Cho
authors.forename: H S
authors.initials: HS
authors.lastname: Lee
authors.forename: Y S
authors.initials: YS
authors.lastname: Park
mesh_terms: D002574:Cervical Vertebrae; D018592:Cross-Over Studies; D004487:Edema / Q000150:complications; D005260:Female; D006801:Humans; D007103:Immobilization; D007442:Intubation, Intratracheal / Q000295:instrumentation*; D020704:Laryngoscopes; D008297:Male; D008348:Manikins; D011446:Prospective Studies; D013997:Time Factors; D014060:Tongue Diseases / Q000150:complications; D014741:Video Recording / Q000295:instrumentation*