Manikin Laryngoscopy Motion as a Predictor of Patient Intubation Outcomes: A Prospective Observational Study

Area of Science:

• Anesthesiology
• Medical Education
• Patient Safety

Background:

• Laryngoscopy is a critical skill for anesthesiologists.
• Assessing trainee proficiency in laryngoscopy is essential for patient safety.
• Current methods for evaluating laryngoscopy skills may not fully capture performance nuances.

Purpose of the Study:

• To compare laryngoscopy motion parameters between novice and experienced anesthesiologists using a manikin.
• To determine if manikin-based motion measurements can predict successful patient intubation outcomes.
• To evaluate the utility of manikin assessments in determining trainee readiness for unsupervised intubation.

Main Methods:

• Two experiments were conducted comparing beginning residents (CA1) with experienced anesthesiologists (CA3/attendings) using a manikin.
• Motion, force, and duration of laryngoscopy were recorded.
• CA1 residents' laryngoscope path was compared to the 'Attending Route', and outcomes were correlated with manikin metrics using multilevel modeling.

Main Results:

• Novice residents (CA1) used less lift and positioned the laryngoscope blade farther right than experienced anesthesiologists.
• Only 74% of CA1 residents' laryngoscopy trajectory matched the Attending Route.
• Each 1% increase in Attending Route match improved residents' odds of successful tracheal intubation by 3.3% and decreased failed attempts by 1.8%.

Conclusions:

• Manikin-based laryngoscopy motion parameters can predict trainee success in patient intubation.
• These objective measurements may help identify trainees ready for unsupervised intubation.
• This assessment method could enhance training and improve patient safety during intubation procedures.