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Design, development, and face validation of an intubation simulation device using real-time force data feedback.

Gopikrishna M Rao1, Vishwanatha M Rao2, Jeremy Juang3

  • 1Department of Medicine Tufts Medical School Boston MA USA.

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Summary

A novel torque sensor laryngoscope was developed to measure real-time intubation forces. The device demonstrated potential as a teaching tool, with the Mac blade requiring significantly less force than the Miller blade.

Keywords:
airway simulationbiomechanical analysisdevice designendotracheal intubationface validationlaryngoscopetorque sensor

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Area of Science:

  • Medical Devices
  • Anesthesiology
  • Clinical Engineering

Background:

  • Laryngoscopy is a critical procedure in airway management.
  • Objective force and torque measurements during intubation are lacking.
  • A novel device is needed to quantify forces applied during laryngoscopy.

Purpose of the Study:

  • To develop a novel laryngoscope device for real-time force and torque measurement during intubation.
  • To evaluate the efficacy of this device through a face validation simulation with experts.

Main Methods:

  • A torque sensor laryngoscope was designed and calibrated.
  • A face validation study involved three intubation experts.
  • Quantitative (force metrics) and qualitative (expert feedback) data were collected using Mac and Miller blades.

Main Results:

  • The Miller blade required significantly higher mean maximum force (31.6 N) and total impulse (216.2 N·s) compared to the Mac blade (24.5 N and 164.6 N·s, respectively).
  • Average force exerted was 15.8 N for Miller and 13.6 N for Mac blades.
  • Expert feedback indicated the device, though bulky, performed similarly to standard models and has potential as a teaching tool.

Conclusions:

  • The torque sensor laryngoscope successfully measures real-time intubation force metrics.
  • Significant differences in force application were observed between Mac and Miller blades.
  • The device shows promise as an educational tool for training in laryngoscopy.