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Related Experiment Video

Updated: Jun 22, 2026

Evaluating Flight Performance and Eye Movement Patterns Using Virtual Reality Flight Simulator

Evaluating Flight Performance and Eye Movement Patterns Using Virtual Reality Flight Simulator

Published on: May 19, 2023

The King LT versus the Combitube: flight crew performance and preference.

Elizabeth A Tumpach¹, Michael Lutes, Dennis Ford

¹Department of Emergency Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.

Prehospital Emergency Care

|June 6, 2009

Summary

The King LT airway device was placed significantly faster and perceived as easier to insert by air medical personnel compared to the Combitube. Most participants preferred the King LT in a simulator study.

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Area of Science:

Emergency Medicine
Airway Management
Medical Devices

Background:

Air medical personnel require effective emergency airway solutions.
The Combitube is a widely used device for emergency and rescue airway management.
Evaluating newer airway devices is crucial for improving pre-hospital care.

Purpose of the Study:

To compare the performance and user preference of the King LT laryngeal tube airway against the Combitube.
To assess insertion times and perceived ease of use in a simulated environment.
To inform the selection of optimal airway devices for air medical services.

Main Methods:

Twenty-seven air medical professionals (physicians, nurses, paramedics) participated.
Subjects received training and practiced with both the King LT and Combitube.
Device insertion was tested on a Laerdal SimMan simulator, recording success rates and time to placement.
Perceived ease of insertion was rated on a 5-point Likert scale.

Main Results:

All participants successfully placed both devices.
The King LT demonstrated a significantly faster mean placement time (24.4 seconds) compared to the Combitube (37.9 seconds).
Participants rated the King LT as significantly easier to insert (mean score 1.3) than the Combitube (mean score 2.5).
Twenty-six out of 27 participants (96%) preferred the King LT.

Conclusions:

The King LT offers a significant advantage in terms of speed and ease of insertion compared to the Combitube in simulated emergency airway scenarios.
The majority of air medical personnel preferred the King LT, suggesting potential for improved clinical practice.
Further research using human models is recommended to validate these findings in real-world settings.