How to perform water exchange colonoscopy, with tips and tricks

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Presentation transcript:

How to perform water exchange colonoscopy, with tips and tricks Sergio Cadoni, MD, Sauid Ishaq, FRCP VideoGIE Volume 4, Issue 8, Pages 355-357 (August 2019) DOI: 10.1016/j.vgie.2019.03.021 Copyright © 2019 Terms and Conditions

Figure 1 Insertion is carried out in clear water, all gas pockets and residual debris being removed. The lumen is distended just as necessary to allow instrument insertion. VideoGIE 2019 4, 355-357DOI: (10.1016/j.vgie.2019.03.021) Copyright © 2019 Terms and Conditions

Figure 2 Under water, the ileocecal valve is buoyant; the terminal ileum is easy to intubate. VideoGIE 2019 4, 355-357DOI: (10.1016/j.vgie.2019.03.021) Copyright © 2019 Terms and Conditions

Figure 3 Enhanced underwater view of the villi of the terminal ileum. VideoGIE 2019 4, 355-357DOI: (10.1016/j.vgie.2019.03.021) Copyright © 2019 Terms and Conditions

Figure 4 The appendix orifice seen underwater. The cecum is thoroughly cleaned before the withdrawal phase is started. VideoGIE 2019 4, 355-357DOI: (10.1016/j.vgie.2019.03.021) Copyright © 2019 Terms and Conditions

Figure 5 During the withdrawal phase the colon is very clean, and only a few small ponds of water are left to aspirate. This results in less distraction from activities linked to cleaning (irrigation and aspiration) than in procedures with gas insufflation (either air or carbon dioxide) during insertion. VideoGIE 2019 4, 355-357DOI: (10.1016/j.vgie.2019.03.021) Copyright © 2019 Terms and Conditions

Figure 6 Fake cecum at midtransverse colon. Usually gas bubbles or remnants of the preparation streaming from the proximal segments, and the length of the inserted colonoscope, reveal that the cecum has not been reached. VideoGIE 2019 4, 355-357DOI: (10.1016/j.vgie.2019.03.021) Copyright © 2019 Terms and Conditions

Figure 7 Diverticula seen under water have a different shape; the surrounding mucosa appears to have some circular rings around them. The position of the bowel lumen (at 5 o’clock) is shown by the convergence of longitudinal folds. VideoGIE 2019 4, 355-357DOI: (10.1016/j.vgie.2019.03.021) Copyright © 2019 Terms and Conditions

Figure 8 Flat polyps (here in the transverse colon) buoy into the lumen and are more visible. VideoGIE 2019 4, 355-357DOI: (10.1016/j.vgie.2019.03.021) Copyright © 2019 Terms and Conditions

Figure 9 Pedunculated polyp at the sigmoid ensnared and with a clip positioned at midstalk. Even large polyps can be removed under water during insertion. VideoGIE 2019 4, 355-357DOI: (10.1016/j.vgie.2019.03.021) Copyright © 2019 Terms and Conditions