Effect of the curved blade size on the outcomes of tracheal intubation performed by incoming interns: A randomized controlled manikin study

Medicine
Ji-Hoon KimSeung Joon Lee

Abstract

Novice clinicians who have little or no clinical experience in tracheal intubation occasionally need a long time to perform the procedure when using a large curved blade. They also have a lower tracheal intubation success rate, especially in emergency situations, such as cardiac arrest, than experienced practitioners. This study aimed to investigate whether the size of the curved laryngoscope blade affects the outcomes of tracheal intubation performed by incoming interns on a manikin model. After completing a pre-study survey, the participants (n = 221) were randomly assigned into the following 2 groups based on the curved blade size: size 3 (n = 111) and size 4 (n = 110) curved blade groups. This study was conducted during a 1-day boot camp for incoming interns. The participants performed tracheal intubations using Macintosh laryngoscopes with size 3 or 4 blades on a Laerdal Airway Trainer (Laerdal, Stavanger, Norway). Subsequently, the participants were asked to complete a post-study survey. The primary outcome was the time to successful intubation (TSI). Meanwhile, the secondary outcomes were the first-pass and overall success rates, self-reported proximal esophagus visualization, and esophageal intubation. All intubation at...Continue Reading

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