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- Title
Usefulness and Educational Benefit of a Virtual Scale Endoscope in Measuring Colorectal Polyp Size.
- Authors
Takehara, Yudai; Yamashita, Ken; Morimoto, Shin; Tanino, Fumiaki; Yamamoto, Noriko; Kamigaichi, Yuki; Tanaka, Hidenori; Takigawa, Hidehiko; Yuge, Ryo; Urabe, Yuji; Oka, Shiro
- Abstract
Introduction: The virtual scale endoscope (VSE) is a newly introduced endoscope that helps endoscopists in measuring colorectal polyp size (CPS) during colonoscopy by displaying a virtual scale. This study aimed to determine the usefulness of the VSE for CPS measurement and the educational benefit of using VSE images to improve CPS estimation accuracy. Methods: This study included 42 colorectal polyps in 26 patients treated at Hiroshima University Hospital. In study 1, CPS measured using a VSE before endoscopic mucosal resection was compared with CPS measured on resected specimens, and the agreement between the two measurement methods was evaluated via Bland-Altman analysis. In study 2, 14 endoscopists (5 beginners, 5 intermediates, and 4 experts) took a pre-test to determine the size of 42 polyps. After the pre-test, a lecture on CPS measurement using VSE images was given. One month later, the endoscopists took a post-test to compare CPS accuracy before and after the lecture. Results: In study 1, Bland-Altman analysis revealed no fixed or proportional errors. The mean bias ±95% limits of agreement (±1.96 standard deviations) of the measurement error was −0.05 ± 0.21 mm, indicating that the agreement between two measurement methods was sufficient. In study 2, the accuracy of CPS measurement was significantly higher among beginners (59.5% vs. 26.7%, p < 0.01) and intermediates (65.2% vs. 44.3%, p < 0.05) in the post-test than in the pre-test. Conclusion: The VSE accurately measures CPS before resection, and its images are useful teaching tools for beginner and intermediate endoscopists.
- Subjects
BLAND-Altman plot; COLON polyps; EDUCATIONAL benefits; MEASUREMENT errors; VIRTUAL colonoscopy; ENDOSCOPIC surgery
- Publication
Digestion, 2024, Vol 105, Issue 2, p73
- ISSN
0012-2823
- Publication type
Article
- DOI
10.1159/000533326