Touch Surgery: Analysis and Assessment of Validity of a Hand Surgery Simulation "App".

Background: Surgical educators are increasingly exploring surgical simulation and other nonclinical teaching adjuncts in the education of trainees. The simulators range from purpose-built machines to inexpensive smartphone or tablet-based applications (apps). This study evaluates a free surgery module from one such app, Touch Surgery, in an effort to evaluate its validity and usefulness in training for hand surgery procedures across varied levels of surgical experience.

Methods: Participants were divided into 3 cohorts: fellowship-trained hand surgeons, orthopedic surgery residents, and medical students. Participants were trained in the use of the Touch Surgery app. Each participant completed the Carpal Tunnel Release module 3 times, and participants' score was recorded for each trial. Participants also completed a customized Likert survey regarding their opinions on the usefulness and accuracy of the app. Statistical analysis using a 2-tailed t test and analysis of variance was performed to evaluate for performance within and between cohorts.

Results: All cohorts performed better on average with each subsequent simulation attempt. For all attempts, the experts outperformed the novice and intermediate participants, while the intermediate cohort outperformed the novice cohort. Novice users consistently gave the app better scores for usefulness as a training tool, and demonstrated more willingness to use the product.

Conclusions: The study confirms app validity and usefulness by demonstrating that every cohort's simulator performance improved with consecutive use, and participants with higher levels of training performed better. Also, user confidence in this app's veracity and utility increased with lower levels of training experience.