Frimberger Eckart, Klare Peter, Haller Bernhard, Elnegouly Mayada, Bajbouj Monther, Schmid Roland M, von Delius Stefan, Abdelhafez Mohamed
Klinik und Poliklinik für Innere Medizin, Munich, Germany.
Institut für Medizinische Statistik und Epidemiologie, Klinikum rechts der Isar der Technischen Universität München, Munich, Germany.
Endosc Int Open. 2020 Oct;8(10):E1522-E1529. doi: 10.1055/a-1186-8420. Epub 2020 Oct 7.
Colonoscopic polypectomy is an essential endoscopic skill. The simulators available for training are limited and based on raw porcine colons. Animal intestines are inconvenient and offer limited advantages for polypectomy training. These limitations are avoided by two novel mechanical simulators - the magnetic system based simulator (MSPS) and the simulator for polypectomy with high frequency current (HFPS) - described here. They are equipped to demonstrate self-repair of polyps after making a cut and hybrid polyps. The aim of this study was to describe and establish face, content, and construct validity of the two simulators and to assess their perceived utility as training and assessment tools. Ten novice, seven intermediate, and 10 advanced endoscopists participated in this study. Each one performed two polypectomies in MSPS and then one polypectomy and polyp retrieval in HFPS. The median times were compared among the three groups to preliminarily assess construct validity as a primary outcome. To establish face validity, the novices and intermediates completed a questionnaire about the credibility of each simulator after finishing the tasks. For content validity, the experts completed a questionnaire grading different aspects of the simulators' realism and their usefulness for training. All 27 participants completed the modules. Median times needed to complete the tasks in both simulators differed significantly between the participants with different levels of experience ( < 0.05). Both MSPS and HFPS received favorable scores regarding face and content validity. No technical problems were encountered. This study provides preliminary validation for MSPS and HFPS as useful training tools in a preclinical setting as well as during colonoscopy training. Moreover, we demonstrated the construct validity of both simulators, which confirms their use as a skill assessment tool during a colonoscopy training program.
结肠镜息肉切除术是一项重要的内镜技术。现有的用于培训的模拟器有限，且基于未经处理的猪结肠。动物肠道使用不便，在息肉切除术培训方面优势有限。本文介绍的两种新型机械模拟器——基于磁系统的模拟器（MSPS）和高频电流息肉切除术模拟器（HFPS）——避免了这些局限性。它们能够演示息肉切除后息肉的自我修复以及混合性息肉。本研究的目的是描述并确立这两种模拟器的表面效度、内容效度和结构效度，并评估它们作为培训和评估工具的实用价值。10名新手、7名中级和10名高级内镜医师参与了本研究。每人在MSPS中进行两次息肉切除术，然后在HFPS中进行一次息肉切除术和息肉取出术。比较三组的中位时间，以初步评估作为主要结果的结构效度。为确立表面效度，新手和中级医师在完成任务后填写了一份关于每个模拟器可信度的问卷。为确立内容效度，专家们填写了一份问卷，对模拟器的逼真程度及其在培训中的有用性的不同方面进行评分。所有27名参与者都完成了各个模块。不同经验水平的参与者完成两种模拟器任务所需的中位时间存在显著差异（<0.05）。MSPS和HFPS在表面效度和内容效度方面均获得了良好评分。未遇到技术问题。本研究为MSPS和HFPS作为临床前环境以及结肠镜检查培训中的有用培训工具提供了初步验证。此外我们还证明了这两种模拟器的结构效度，这证实了它们在结肠镜检查培训项目中作为技能评估工具的用途。
