Effect of Screen Distance on Colonic Polyp Detection and Colonic Polyp Size Estimation: A Pilot Study

Background Colorectal cancer is the 3rd most common in world, with about 1.2 million new cases reported annually. It one of three causes related mortality Europe and North America. Thus, prevention detection are critical aspects managing colorectal cancer. Colonoscopy remains gold standard for screening cancer, as it valuable not only but also polyp identification. Adenoma rate a pivotal part good endoscopic exam. While various factors have been known to influence it, data regarding ideal screen distance adenoma unclear. The aim this study was assess estimate size diminutive (<1 cm) polyps varying from proceduralist. Materials Methods This quality improvement project carried at OSF Saint Francis Medical center where post graduate trainees attending physicians were enrolled. A 26-inch-high resolution used placed eye level endoscopist. We selected 50 high slides intermixed normal colonic mucosa. These downloaded Orpheus Medical, global clinical media platform video informatics company. shown each endoscopist standing either 3, 6, or 9 feet away (0.91, 1.8, 2.7 meters) on separate days, arranged 3 different configurations. Both sizes measured distances recorded. endoscopists able move +/- 10 cm (0.5 feet) their index position enhance visualization better accommodation. collected multiple outcomes statistical analysis performed using odds ratio t-test. Results Seven subjects who year Gastroenterology fellows attendings included study. slides, 33 consisting others containing Our results showed that number detected decreased increased. Overall (PDR) 92.18% (0.91 m), 87% 6 (1.8m) 77% (2.7m). An positioned ft had statistically significant higher than (OR) 3.43 (95% CI: 1.45 – 8.11, p= 0.004). mean by all 2.68 mm feet, 2.57 2.25 feet. Comparison did reveal differences. Secondary accuracy detection, miss overestimation rate. participating surveyed verbally end comfort distances. They highest (0.91m), followed (1.8m). Conclusions sheds light importance especially case smaller <1cm. show should be close (0.91m) ideally no more Similarly, our point out may overestimated if examiner too underestimated far screen. advocate standardization endoscopist, so estimation uniform across board.