Abstract
Background
Virtual Reality (VR) uses headsets and motion-tracked controllers so surgeons can perform simulated total hip arthroplasty (THA) in a fully-immersive, interactive 3D operating theatre. The aim of this study was to investigate the effect of laboratory-based VR training on the ability of surgical trainees to perform direct anterior approach THA on cadavers.
Methods
Eighteen surgical trainees (CT1-ST4) with no prior experience of direct anterior approach (DAA) THA completed an intensive 1-day course (lectures, dry-bone workshops and technique demonstrations). They were randomised to either a 5-week protocol of VR simulator training or conventional preparation (operation manuals and observation of real surgery). Trainees performed DAA-THA on cadaveric hips, assisted by a passive scrub nurse and surgical assistant. Performance was measured on the Intercollegiate Surgical Curriculum Project (ISCP) procedure-based assessment (PBA), on a 9-point global summary score (Table 1). This was independently assessed by 2 hip surgeons blinded to group allocation. The secondary outcome measure was error in cup orientation from a predefined target (40° inclination and 20° anteversion).
Results
Surgeons trained using VR performed a cadaveric DAA-THA significantly better than those using conventional preparation, as assessed by acetabular cup orientation (p<0.001) and using the ISCP-PBA. Two VR surgeons achieved Level 3b, 6 were graded at Level 3a, and 1 was graded at Level 2b. Six non-VR surgeons achieved Level 2a and 3 were graded at Level 1b.
Discussion
These data demonstrate transfer of procedural knowledge and psychomotor skills learnt from VR to a real-world setting. Conventional preparation had limited value for novice surgeons learning arthroplasty. VR training advanced them further up the learning curve.
Implications
Virtual reality can augment surgical training for open procedures in orthopaedics curve, so opportunities in real surgery can be maximised. This has implications for how surgical training is delivered for surgeons learning a new, complex procedure.
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