Hanna G B, Drew T, Clinch P, Shimi S, Dunkley P, Hau C, Cuschieri A
Department of Surgery, University of Dundee, Scotland.
Ann Surg. 1997 Mar;225(3):333-8. doi: 10.1097/00000658-199703000-00014.
The objective of this study was to compare the psychomotor aptitudes relevant to endoscopic manipulations between right-handed and left-handed subjects.
There has been little research on the psychomotor performance in relation to minimal access surgery and there are no psychomotor tests to evaluate aspects of psychomotor abilities relevant to endoscopic manipulations.
A microprocessor-controlled psychomotor tester was developed for objective evaluation of endoscopic performance. The task involved negotiating ten target holes with a probe under videoscopic imaging. Subjects consisted of two groups of 10 medical students: right- and left-handed. After a prestudy familiarization session, each subject performed two test runs with one hand, followed by two runs with the other hand. These test runs were repeated 1 week later. The outcome measures were the total execution time, force on backplate, angular deviations, error rate, and first-time accuracy.
A significant difference in the error rate and first time accuracy was observed between subjects (p < 0.001 and p < 0.001, respectively) and between the dominant and nondominant hands (p < 0.001 and p < 0.025, respectively), with no significant change with practice. Right-handed subjects performed better with either hand in terms of error rate (p < 0.001) and first time accuracy (p < 0.001). Practice improved the execution time (p < 0.001) and the degree of angular deviations (p < 0.02).
Right-handed subjects perform less errors and exhibit better first time accuracy. The parameters that improve with practice reflect the positive effect of training, whereas others, such as errors rate and first time accuracy which do not, reflect innate abilities.
本研究的目的是比较右利手和左利手受试者与内镜操作相关的心理运动能力。
关于微创外科手术的心理运动表现的研究很少，并且没有心理运动测试来评估与内镜操作相关的心理运动能力方面。
开发了一种微处理器控制的心理运动测试仪，用于客观评估内镜操作表现。任务是在视频成像下用探针穿过十个目标孔。受试者由两组各10名医学生组成：右利手和左利手。在进行预研究熟悉环节后，每个受试者先用一只手进行两次测试，然后用另一只手进行两次测试。这些测试在1周后重复进行。结果测量指标包括总执行时间、背板上的力、角度偏差、错误率和首次成功率。
在受试者之间（分别为p < 0.001和p < 0.001）以及优势手和非优势手之间（分别为p < 0.001和p < 0.025）观察到错误率和首次成功率有显著差异，且练习后无显著变化。右利手受试者无论用哪只手在错误率（p < 0.001）和首次成功率（p < 0.001）方面表现更好。练习改善了执行时间（p < 0.001）和角度偏差程度（p < 0.02）。
右利手受试者犯错较少，首次成功率更高。随着练习而改善的参数反映了训练的积极效果，而其他参数，如错误率和首次成功率则没有改善，反映了先天能力。
