O73 Simulated digital fluoroscopic imaging: the construct, face and content validity and the training effect of a dynamic hip screw simulator

BackgroundSurgical training is evolving, with a reduction in theatre time and case complexity for current trainees. Additionally, surgical training programmes are moving to competency based models, where technical skills and knowledge are assessed for progression. Trainees need new adjuncts to theatre to learn complex procedures. The dynamic hip screw (DHS) procedure involves a cognitive understanding for predictors of failure alongside a psychomotor skill set to achieve the correct position of the implant guided by fluoroscopy. Current DHS simulation uses workshop bones without fluoroscopy, due to the associated radiation risks. Virtual reality simulation is also available, however this doesn't utilise the correct surgical equipment, so the motor skills needed for the procedure are not developed. We present the construct validity of a digital fluoroscopy simulator, FluoroSim. This simulation system can reproduce radiographs for workshop bones simulation of the DHS procedure. The null hypothesis states there will be no difference in performance by users with varying DHS experience.MethodsTwenty-six trauma and orthopaedics doctors, from post-graduate year 3 (PGY3) to consultancy level were recruited in a multicentre trial. Each participant received standardised instructions and completed a single attempt using FluoroSim to insert a DHS guide-wire using digital fluoroscopy guidance. The doctors were categorised based on the number of DHS procedures they had completed as the primary surgeon; novice (