Recruiting expertise: how surgical trainees engage supervisors for learning in the operating room.

Surgical trainees recruit expertise from supervisors using practices of four different categories. Trainees' actions are provoked by the moment at which they experience insufficient expertise and are focused on the task at hand in the immediate present. Supervisors can and do elaborate on these requests to provide explicit teaching. Insight into these practices provides tools for reflection on OR learning, proficiency assessment and deliberation to adapt guidance in the real time of the procedure.