Validation of a 3D-Printed Silicone-Based Laryngeal Model for Resident Education.

OBJECTIVE

We sought to validate a laryngeal simulation model and subsequently demonstrate its efficacy in improving surgical technique.

STUDY DESIGN

Pre-post interventional study.

SETTING

Otolaryngology Program at a Tertiary Care Center.

METHODS

A low-cost, high-fidelity laryngeal model was created using a 3-dimensional-printed cast and multilayered silicone to mimic vocal fold lesions. Participants (attendings and trainees) were first given a series of tasks including mucosal vocal fold lesion resection and microflap excision of a submucosal lesion. Trainees were then provided with an instructional video from a laryngologist and asked to repeat the same tasks on the model. Performance data was then assessed using validated surveys and blinded expert reviewers.

RESULTS

Eighteen participants completed the simulation. All subjects agreed that the "simulation experience was useful" and 93% agreed "the simulator helped improve my ability to do microsurgical tasks." In the postinstruction self-evaluation, trainees reported a significant decrease in mental demand (95% confidence interval [CI]: 0.37-0.91; P = .038) and significant increase in subjective performance (95% CI: 1.51-51.89; P = .016) compared to the preinstruction self-evaluation. On the postinstruction attempt, there was a significant improvement in all domains of the adapted objective structured assessment of technical skills as measured by 3 blinded, expert reviewers.

DISCUSSION

This study demonstrates the usefulness of a silicone larynx model and the value of instructional video in developing laryngeal microsurgical skills. Participants positively reviewed the laryngeal model and trainees saw both a subjective and objective improvement indicating tangible operative benefits from the use of this laryngeal simulation.