McCarthy Avril D, Moody Louise, Waterworth Alan R, Bickerstaff Derek R
Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, England.
Clin Orthop Relat Res. 2006 Jan;442:13-20. doi: 10.1097/01.blo.0000194678.10130.ff.
Previous investigation of a cost-effective virtual reality arthroscopic training system, the Sheffield Knee Arthroscopy Training System (SKATS), indicated the desirability of including haptic feedback. A formal task analysis confirmed the importance of knee positioning as a core skill for trainees learning to navigate the knee arthroscopically. The system cost and existing limb interface, which permits knee positioning, would be compromised by the addition of commercial active haptic devices available currently. The validation results obtained when passive haptic feedback (resistance provided by physical structures) is provided indicate that SKATS has construct, predictive and face validity for navigation and triangulation training. When tested using SKATS, experienced surgeons (n = 11) performed significantly faster, located significantly more pathologies, and showed significantly shorter arthroscope path lengths than a less experienced surgeon cohort (n = 12). After SKATS training sessions, novices (n = 3) showed significant improvements in: task completion time, shorter arthroscope path lengths, shorter probe path lengths, and fewer arthroscope tip contacts. Main improvements occurred after the first two practice sessions, indicating rapid familiarization and a training effect. Feedback from questionnaires completed by orthopaedic surgeons indicates that the system has face validity for its remit of basic arthroscopic training.
先前对一种具有成本效益的虚拟现实关节镜训练系统——谢菲尔德膝关节镜训练系统(SKATS)的研究表明,加入触觉反馈是可取的。一项正式的任务分析证实,膝关节定位作为学员学习关节镜下膝关节操作的一项核心技能非常重要。目前可用的商业有源触觉设备的添加会影响系统成本和现有的肢体接口(该接口允许进行膝关节定位)。提供被动触觉反馈(由物理结构提供的阻力)时获得的验证结果表明,SKATS在导航和三角测量训练方面具有结构效度、预测效度和表面效度。在使用SKATS进行测试时,经验丰富的外科医生(n = 11)比经验较少的外科医生队列(n = 12)操作速度明显更快,发现的病变明显更多,并且关节镜路径长度明显更短。经过SKATS训练课程后,新手(n = 3)在以下方面有显著改善:任务完成时间、更短的关节镜路径长度、更短的探针路径长度以及更少的关节镜尖端接触次数。主要改善发生在前两次练习课程之后,表明能快速熟悉并产生训练效果。骨科医生填写的问卷反馈表明,该系统在基础关节镜训练方面具有表面效度。
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