An aid for simultaneous instructor and trainee viewing of orotracheal intubation

Comparison of learning direct laryngoscopy using a McGrath videolaryngoscope as a direct versus indirect laryngoscope: a randomized controlled trial

OBJECTIVE

Tracheal intubation using a direct laryngoscope is difficult to teach. The McGrath videolaryngoscope, a Macintosh-like device with a camera, can be used as a direct laryngoscope to educate novices under supervision using the screen. We compared the effect on Macintosh laryngoscopy skills following training with a McGrath videolaryngoscope as a direct versus indirect laryngoscope.

METHODS

Thirty-seven participants were randomized into direct and indirect groups according to the training method using a McGrath videolaryngoscope. Participants attempted Macintosh direct laryngoscopy in normal and difficult airway scenarios. The primary endpoint was the intubation time, and the rate of successful intubation, dental trauma, and difficulty were secondary outcomes.

RESULTS

The intubation time after education decreased significantly in both groups and was significantly shorter in the direct group than in the indirect group across time. The difficulty degree in the direct group was lower than that in the indirect group across time; however, the rate of dental trauma was not significantly different.

CONCLUSION

Both direct and indirect laryngoscopy using a McGrath videolaryngoscope improved the performance of Macintosh direct laryngoscopy in novices, while direct laryngoscopy using a McGrath videolaryngoscope demonstrated better educational effects than indirect laryngoscopy.Registered at ClinicalTrials.gov (NCT03471975).

Teaching and supervising tracheal intubation in paediatric patients using videolaryngoscopy

In 85 patients (mean age 4.6 +/- 3.1 years, range 0-10 years), a prototype of a new videolaryngoscope was used to provide a display of the intubation procedure in a paediatric anaesthesia teaching unit. The device provided important information to the teacher about the trainee's problems related to direct laryngoscopy, difficulties with tube insertion into the larynx as well as the need and extent for anterior laryngeal pressure. Because the videolaryngoscope did not impair the normal intubation procedure, it seems to be a safe and a benefical tool for teaching and supervising tracheal intubation in children. In addition, it provides a potentially useful aid during difficult laryngoscopy, since the monitor view of the vocal cords was significantly better compared with a direct laryngoscopic view (P < 0.001).