Evaluation of the success rate of intubation in Difficult Airway modeling with two methods of video laryngoscopy (teacher documented) and conventional laryngoscopy by medical students

Abstract

Difficult or failed intubation is one of the main causes of complications in patients and a big challenge for anesthesiologists and physicians. Skill to performing intubation of patients with difficult airways requires airway anatomy knowledge of and physiology, the ability to assess and identify patients with difficult airways, and having sufficient training in this field. In difficult airway training, it is difficult to teach with a Macintosh laryngoscope because the student cannot see the full view of the larynx and vocal cords with the teacher and receive adequate training. To compensate for these limitations, more efforts were made to invent different tools and techniques. video laryngoscopy improves the view of the glottic structures on the monitor and the images on the monitor can be seen simultaneously by the learner and the professor, and this advantage can be useful in intubation training. Also, on the other hand, evaluating the ability level of medical trainees in managing the problem airway is one of the research concerns. In this study, we decided to determine the success rate of intubation in difficult airways modeling with two methods of laryngoscopy with laryngoscopy and Macintosh direct laryngoscopy by medical students. Methods: This study was conducted with the participation of 58 medical students in two Macintosh direct and video endoscopy group in the Center for Clinical Skills Assessment of the Faculty of Pharmacy during 1402. First, the students performed direct laryngoscopy on the modeling with a Macintosh laryngoscopy, and then performed intubation with a video laryngoscopy .Time required for intubation, success rate, number of attempts and satisfaction in both groups were recorded and compared with each other.

Results: In the present study, the time required for intubation was longer in the Macintosh laryngoscopy group and the average number of attempts in the video laryngoscopy group was significantly lower (p=0.01) so that most students in the Macintosh laryngoscopy group (48.2%) were able to perform intubation with 4 attempts and the Macintosh laryngoscopy group (56.9%) with 3 attempts. Successful intubation had significant difference the two groups (p=0.01). also, most of the students in the video laryngoscopy group had a good satisfaction of 72.4%.