Data from: Are multiple views superior to a single view when teaching hip surgery? a single-blinded randomized controlled trial of technical skill acquisition

Purpose: Surgical education videos currently all use a single point of view (POV) with the trainee locked onto a fixed viewpoint, which may not deliver sufficient information for complex procedures. We developed a novel multiple POV video system and evaluated its training outcome compared with traditional single POV. Methods: We filmed a hip resurfacing procedure performed by an expert attending using 8 cameras in theatre. 30 medical students were randomly and equally allocated to learn the procedure using the multiple POV (experiment group [EG]) versus single POV system (control group [CG]). Participants advanced a pin into the femoral head as demonstrated in the video. We measured the drilling trajectories and compared it with pre-operative plan to evaluate distance of the pin insertion and angular deviations. Two orthopedic attendings expertly evaluated the participants' performance using a modified global rating scale (GRS). There was a pre-video knowledge test that was repeated post-simulation alongside a Likert-scale questionnaire. Results: The angular deviation of the pin in EG was significantly less by 29% compared to CG (p=0.037), with no significant difference in the entry point's distance between groups (p=0.204). The GRS scores for EG were higher than CG (p=0.046). There was a 32% higher overall knowledge test score (p<0.001) and 21% improved Likert-scale questionnaire score (p=0.002) after video-learning in EG than CG, albeit no significant difference in the knowledge test score before video-learning (p=0.721). Conclusion: The novel multiple POV provided significant objective and subjective advantages over single POV for acquisition of technical skills in hip surgery.研究目的：当前外科教育视频均采用单视点（Point of View，POV）模式，学员被固定于单一视点，难以针对复杂手术操作提供充足信息。为此我们研发了一种新型多视角视频系统，并对比传统单视点系统评估其教学效果。 方法：我们在手术室中使用8台摄像机，拍摄了一名骨科资深主治医师完成的髋关节表面置换手术。将30名医学生随机平均分为两组，分别采用多视角系统（实验组，Experiment Group，EG）与单视角系统（对照组，Control Group，CG）学习该手术操作。受试者需按照视频演示将导针植入股骨头。我们测量钻孔轨迹，并与术前规划进行比对，以评估导针植入的距离偏差与角度偏差。两名骨科资深主治医师采用改良整体评分量表（Global Rating Scale，GRS）对受试者的操作表现进行专业评估。实验前设置知识测试，模拟操作后重复该测试，并辅以李克特量表（Likert-scale）问卷调研。 结果：实验组导针的角度偏差较对照组显著降低29%（p=0.037），两组在植入点距离偏差上无显著差异（p=0.204）。实验组的整体评分量表得分高于对照组（p=0.046）。相较于对照组，实验组在视频学习后的整体知识测试得分提升32%（p<0.001），李克特量表问卷得分提升21%（p=0.002）；但两组在视频学习前的知识测试得分无显著差异（p=0.721）。 结论：相较于传统单视点系统，新型多视角视频系统在髋关节手术操作技能习得方面，具备显著的客观与主观优势。