Fig. 4From: Orthopaedic residents demonstrate retention of point of care ultrasound knowledge after a brief educational session: a quasi experimental studyResidents’ comfort level in the 6 months before and after the course. Subjective comfort level (NAS) of the residents while performing ultrasound tasks in the 6 months preceding (blue) and the 6 months following (orange) the course. Abbreviations: inj = injection, asp = aspiration, # = fractureBack to article page