EVALUATION OF SKILL ACQUISITION OF VIDEOLARYNGOSCOPY IN COMPARISON TO DIRECT LARYNGOSCOPY IN POSTGRADUATE MEDICAL STUDENTS: A MANIKIN STUDY

Abstract

Background: Direct laryngoscopy with Macintosh laryngoscope (ML) is the gold standard technique for tracheal intubation. However, visualization of the larynx and subsequent tracheal intubation may not be possible in difcult airways. TruView video laryngoscope (TVL) can provide good visualization of the glottis and visual conrmation of tracheal intubation in a difcult airway scenario. This manikin study was carried out to compare the skill acquisition for videolaryngoscopy using TVL and compare it with direct laryngoscopy using ML, in easy and difcult airway scenarios, in TVL novice participants. Material and methods: Thirty resident doctors were randomized to participate in a crossover, manikin study. Participants were asked to intubate a manikin in easy and difcult airway scenarios using TruView and Macintosh laryngoscope. Two trials were conducted at one-week interval and at the end of each trial parameters of Intubation time, Cormack-Lehane (CL) grading, success of intubation and ease of intubation which reect skill acquisition were recorded. All 30 participants completed the study. Results: In the easy scenario most results were comparable between the two devices. The TVL scored over ML in all aspects of difcult intubation with signicantly lesser time for intubation (23.27 ± 1.8sec, P<0.0001), lower CL grade (1&2-100%), higher success of intubation in the rst attempt (83.33%, P=0.0016) and greater ease of intubation (100%, P<0.0001). Conclusion: TVL scores over ML in difcult airway scenarios in novice users of TVL, within a short learning time.