术前柔性乙状结肠镜检查训练器。基于虚拟现实系统的验证与早期评估。

The PreOp flexible sigmoidoscopy trainer. Validation and early evaluation of a virtual reality based system.

作者信息

Datta V, Mandalia M, Mackay S, Darzi A

机构信息

Department of Surgical Oncology and Technology, Imperial College School of Medicine at St. Mary's, London, United Kingdom.

出版信息

Surg Endosc. 2002 Oct;16(10):1459-63. doi: 10.1007/s00464-002-9014-4. Epub 2002 Jun 4.

DOI:10.1007/s00464-002-9014-4

PMID:12042913

Abstract

AIM

To demonstrate face and construct validity of a computer based flexible sigmoidoscopy trainer.

METHODS

The PreOp (Immersion Medical, USA) system is a virtual reality based flexible sigmoidoscopy simulator. The system records several performance parameters, such as percentage of colonic mucosa visualized, time taken, and pathlength of endoscope travel. Forty-five subjects were divided into three groups: novice (never performed a lower GI endoscopy), intermediate (5-50 examinations), and trained (greater than 200 examinations). After initial familiarization subjects were assessed three times on a case module. Results showed a nonparametric distribution.

RESULTS

There was a significant difference between all three groups with respect to percentage of mucosa visualized (novice 71.0 +/- 3.7%, intermediate 77.3 +/- 5.6%, expert 84.8 +/- 4.6%, Kruskal-Wallis p <0.001) and efficiency ratio (%mucosa/time, novice 0.163 +/- 0.055, intermediate 0.259 +/- 0.07, expert 0.306 +/- 0.058, p <0.001). The novice group was also slower and had a lower pathlength of instrument travel compared to the others.

CONCLUSION

PreOp virtual reality simulator is a valid discriminator of flexible sigmoidoscopic experience. Its effect on training needs to be explored.

摘要

目的

验证基于计算机的乙状结肠镜模拟器的表面效度和结构效度。

方法

PreOp（美国沉浸式医学公司）系统是一种基于虚拟现实的乙状结肠镜模拟器。该系统记录多个性能参数，如可视结肠黏膜百分比、操作时间以及内镜行进路径长度。45名受试者被分为三组：新手组（从未进行过下消化道内镜检查）、中级组（进行过5 - 50次检查）和训练有素组（进行过超过200次检查）。在初步熟悉后，受试者在一个病例模块上接受三次评估。结果显示为非参数分布。

结果

三组在可视黏膜百分比方面存在显著差异（新手组71.0 +/- 3.7%，中级组77.3 +/- 5.6%，专家组84.8 +/- 4.6%，Kruskal - Wallis检验p <0.001）以及效率比（黏膜百分比/时间，新手组0.163 +/- 0.055，中级组0.259 +/- 0.07，专家组0.306 +/- 0.058，p <0.001）。新手组操作速度也较慢，与其他组相比器械行进路径长度较短。