Comparison of Video Laryngoscope and Macintosh Laryngoscope for Face-to-Face Intubation in Sitting Manikin Model With Limitation of Neck Motion by Unexperienced Personnel

Abstract

Background: Trauma patients who entrapped in the accident vehicle are predispose to have cervical spine injuries and they needed to be intubated with face-to-face intubation technique using Macintosh laryngoscope. Nowadays, video laryngoscope has been introduced to improve the intubation technique.
 Objective: To compare the effectiveness of video laryngoscope and Macintosh laryngoscope for face-to-face intubation in sitting manikin model with limitation of neck motion.
 Methods: The study was performed in a randomized experimental study. Subjects were divided into 2 groups both did face-to-face intubation using video laryngoscope and Macintosh laryngoscope in a sitting manikin model with limitation of neck motion. The success rate of intubation, time to finish intubation, and vocal cord visualization were analyzed.
 Results: Of 41 subjects including 2nd and 3rd year paramedic students, 21 subjects went to video laryngoscope group, and 20 subjects went to Macintosh laryngoscopes group. The Macintosh laryngoscope intubation technique showed significantly better success rate compared to video laryngoscope (100% and 25%, P < .001). In addition, intubation time of Macintosh laryngoscope was significantly less than video laryngoscope (mean [SD], 27 [24.7] and 75 [66.3] seconds, P < .001). However, vocal cord visualization from both laryngoscope techniques showed no statistically significant (P = .08).
 Conclusions: Intubation training of Macintosh laryngoscope for in sitting model with neck motion limitation showed better success rate and less time than video laryngoscope, with the same vocal cord visualization.