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Simulation model for transcervical laryngeal injection providing real-time feedback.

Tiffiny A Ainsworth1, James B Kobler1, Gregory J Loan2

  • 1Department of Surgery-Harvard Medical School, Center for Laryngeal Surgery and Voice Rehabilitation, Massachusetts General Hospital, Boston, Massachusetts, USA.

The Annals of Otology, Rhinology, and Laryngology
|June 26, 2014
PubMed
Summary

This study developed a novel simulator for teaching transcervical laryngeal injections. The high-fidelity model offers real-time feedback, enhancing otolaryngologists' confidence and skill acquisition in vocal fold injection procedures.

Keywords:
laryngologylarynxmotor speech disordersneurological disordersotolaryngologyvocal foldvoice disorders

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Area of Science:

  • Otolaryngology
  • Medical Simulation
  • Anatomy

Background:

  • Transcervical laryngeal injections are crucial for treating vocal fold pathologies.
  • Developing proficiency in this technique requires specialized training and practice.
  • Existing training methods may lack realistic anatomical and tactile feedback.

Purpose of the Study:

  • To develop and evaluate a high-fidelity simulation model for teaching transcervical laryngeal injections.
  • To provide realistic anatomical and functional feedback for trainee skill acquisition.
  • To assess the model's impact on otolaryngologists' confidence and competence.

Main Methods:

  • A 3D-printed laryngotracheal framework was created from CT scans.
  • Silicone models of laryngeal structures, including an electrically conductive thyroarytenoid (TA) muscle, were fabricated.
  • An auditory feedback system was integrated to confirm needle placement in the TA muscle during simulated injections.

Main Results:

  • The simulation model successfully provided real-time tactile and auditory feedback.
  • Otolaryngology residents reported increased comfort and confidence in performing transcervical thyroarytenoid injections post-simulation.
  • Face validation confirmed the model's anatomical realism and appropriate tactile feedback.

Conclusions:

  • This study presents the first simulator designed for transcervical vocal fold injection skills.
  • The model effectively aids in skill acquisition through integrated real-time feedback mechanisms.
  • The simulator enhances otolaryngologists' confidence in performing transcervical injections.