Ji Ying, Kong Zhiyu, Deng Yingyue, Chen Jingxi, Liu Yan, Zhao Liang
Department of Thoracic Surgery, Beijing Institute of Respiratory Medicine and Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China.
School of Languages and Communication Studies, Beijing Jiaotong University, Beijing, China.
Ann Transl Med. 2022 May;10(10):592. doi: 10.21037/atm-22-2145.
In light of continued advances in surgical techniques, it is essential to improve the efficacy of training young thoracic surgeons. Increasingly, the feedback of visual information is believed to be a crucial teaching tool. When surgeons are looking at surgical teaching videos, eye gaze technology can be used to record the gaze movement to examine the stages of information access.
A total of 8 novice surgeons and 8 expert surgeons were recruited to watch an instructional video of surgery while Tobii Pro Fusion was used to recorded their movement trajectory. Another 36 novice surgeons were recruited and divided into two groups. One group watched the video following the trajectory of the senior thoracic surgeons' eye movements and the other group watched the raw video. All 36 novice surgeons subsequently underwent a post-test which was conducted via a questionnaire.
The differences in eye fixation patterns and search strategies between novices and experts were assessed using 4 indexes, including total duration of fixation, time to entry saccade, number of saccades, and peak velocity of saccade. The results were compared using independent-sample -tests and repeated-measures analysis. When experts watched the videos, there was a 67.8% overlap of eye gaze compared to a 51.4% overlap in novices (P≤0.001). The post-test showed that novice surgeons who watched the video marked with the senior thoracic surgeon's eye movements had a better understanding of the key points of the operation.
Novice and expert surgeons have different eye fixation patterns and search strategies when watching videos of thoracoscopic surgery. Watching surgical videos marked with expert eye movement trajectories is conducive to novice surgeons to master operative skills.
鉴于外科技术的不断进步，提高年轻胸外科医生的培训效果至关重要。视觉信息反馈越来越被认为是一种关键的教学工具。当外科医生观看手术教学视频时，眼动技术可用于记录注视运动，以检查信息获取阶段。
招募8名新手外科医生和8名专家外科医生观看手术教学视频，同时使用Tobii Pro Fusion记录他们的运动轨迹。另外招募36名新手外科医生并分为两组。一组按照资深胸外科医生的眼动轨迹观看视频，另一组观看原始视频。所有36名新手外科医生随后通过问卷调查进行了后测。
使用4项指标评估新手和专家之间的注视模式和搜索策略差异，包括总注视持续时间、首次扫视时间、扫视次数和扫视峰值速度。使用独立样本t检验和重复测量分析比较结果。专家观看视频时，眼动重叠率为67.8%，而新手为51.4%（P≤0.001）。后测显示，观看标有资深胸外科医生眼动的视频的新手外科医生对手术要点的理解更好。
新手和专家外科医生在观看胸腔镜手术视频时具有不同的注视模式和搜索策略。观看标有专家眼动轨迹的手术视频有利于新手外科医生掌握手术技能。
