Usability-optimization of the interface parameters shape and material in an interaction-based arm-assistance-system

在腹腔镜手术中，外科医生的手臂和上半身往往处于不舒服的静态姿势，这对上肢的要求很高。这可能导致疲劳和降低效率的形式增加错误率在腹腔镜手术。必须全面调查和改善这些缺陷。一个武器辅助系统可以抵消这些缺陷。手臂辅助系统通过在所有静态和动态手臂姿势和运动中通过手臂支撑自适应地向前臂传递支撑力来支持用户。目前，对其功能原理、臂支撑面积、臂支撑力随臂位的适应性进行了可用性研究。结果表明，上肢得到了缓解，精度得到了提高。在本研究项目中，选取了一些操作场景下的界面参数、形状和材质，这些都是基于之前的项目中尚未研究的，在可用性方面进行了研究。这些是动态操作场景以及倾斜的静态前臂支撑，受界面参数、形状和扶手材料的影响。在模拟临床任务的执行过程中，手臂辅助系统的扶手的形状和材料的变化将被调查。可用性参数有效性（精度、运动跟踪、工作流分析）、效率（任务执行时间）和满意度（调查）将被收集和评估。在先前的项目中针对手臂支撑区域和根据手臂姿势从下方垂直作用于手臂支撑的手臂支撑力提出的设计建议被用于调查中。手臂支撑区域由前臂上的支撑位置和根据前臂长度而定的手臂支撑长度组成。研究项目的结果是对形状和材料性能的总体陈述，并为用户提供最佳的可用性。

During a laparoscopic operation, the surgeons often have uncomfortable static arm and upper body postures, which lead to high demands on the upper extremities. This can lead to fatigue and reduced effectiveness in the form of increased error rates during laparoscopic procedures. These deficits must be investigated and improved holistically. An arm assistance system can counteract these deficits. The arm assistance system supports the user by adaptively transferring a supporting force to the forearm via the arm support in all static and dynamic arm postures and movements. So far, studies have been carried out on the usability of the functional principle, the arm support area and the adaptive arm support force depending on the arm position. A relief of the upper extremities and improvement of precision was proven.In this research project, the interface parameters shape and material of the armrest for selected operating scenarios, which are based on the previous projects and have not yet been researched, are investigated with regard to usability. These are dynamic operating scenarios as well as inclined static forearm supports, which are influenced by the interface parameters shape and material of the armrest. Variations of the shape and material of the armrest of the arm assistance system during the execution of a simulated clinical task will be investigated. The usability parameters effectiveness (precision, motion tracking, workflow analysis), efficiency (time for task execution) and satisfaction (survey) will be collected and evaluated. The design recommendations developed in previous projects for the arm support area and the arm supporting force acting vertically from below on the arm support depending on the arm posture are used in the investigations. The arm support area consists of the support position on the forearm and the support length of the arm support depending on the forearm length. The result of the research project is a general statement on the shape and material properties with optimal usability for the user.