Microsurgery Competency During Plastic Surgery Residency: An Objective Skills Assessment of an Integrated Residency Training Program.

Objective: Microsurgical education is an integral aspect of plastic surgery training. Like most traditional surgical education models, microsurgical skills are taught on an apprenticeship model. This study aims at evaluating microsurgery skill acquisition within an integrated plastic surgery residency using electromagnetic hand-motion analysis and a global rating scale. Methods: This is a cross-sectional study of an integrated plastic surgery residency program. Participants performed microsurgical arterial anastomoses on cryopreserved rat aortas. Hand-motion analysis was recorded using a trakSTAR hand-motion tracker. Total time to complete the task, number of hand movements, and path length (mm) were recorded. Participant videos were graded using a subjective global rating scale (scored 0-100). Results: The data demonstrated construct validity, as hand-motion analysis outcome measures statistically varied according to the level of skill. Mean global rating scale scores increased with level of experience but lacked statistical significance. Conclusions: These data suggest that the objective assessment of hand motion is a valid tool for the evaluation of microsurgical skill. It is more accurate and reflective of the level of skill than a global rating scale. Identifying the predictive validity of hand-motion analysis will be a useful tool to establish clinical safe training and practice thresholds, and the application of both assessment tools simultaneously can yield better evaluation.