Comparing a novel videolaryngoscope with the Macintosh in simulated difficult airway: a manikin study

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Airway or respiratory complication is one of leading causes of morbidity and mortality in anaesthesia. There are different techniques and intubating equipment (laryngoscope) available for anaesthetists to deal with difficult airways. Anaesthetists use their knowledge and previous experience to decide which type of laryngoscope to use in these cases. In this study, we are evaluating, for the first time, this newly available videolaryngoscope. It requires a technique called "indirect laryngoscopy". We are comparing it with the standard direct laryngoscopy by using the Macintosh blade. We hypothesise that In simulated difficult airways, the novel videolaryngoscope achieve a better laryngoscopy view as compared to the Macintosh blade. We will prospectively recruit 30 voluntary anaesthetic residents, registrars or consultants for this study. All participants will be tested on using each of the two intubation devices on a manikin with a simulated difficult airway. Participants will be assigned to one of the two groups – Group 1: novel videolaryngoscope followed by Macintosh laryngoscope, or Group 2: Macintosh laryngoscope followed by novel videolaryngoscope. The primary outcome is the best laryngoscopy view achieved. Secondary outcomes include: • The time taken for successful tracheal intubation. • Number of failed intubation. • Number of intubation attempts. • Number and type of intubating adjuncts used. • The ease of intubation, which will be surveyed using a visual analogue scale from 0-100mm.

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