Evaluation of the severity of ulcerative colitis using endoscopic dual red imaging targeting deep vessels

Author:

Naganuma Makoto12,Yahagi Naohisa3,Bessho Rieko1,Ohno Keiko1,Arai Mari1,Mutaguchi Makoto1,Mizuno Shinta1,Fujimoto Ai3,Uraoka Toshio3,Shimoda Masayuki4,Hosoe Naoki2,Ogata Haruhiko3,Kanai Takanori1

Affiliation:

1. Department of Gastroenterology and Hepatology, Keio University, Tokyo, Japan

2. Center for Diagnostic and Therapeutic Endoscopy, Keio University, Tokyo, Japan

3. Cancer Center, Keio University, Tokyo, Japan

4. Division of Diagnostic Pathology, Keio University, Tokyo, Japan

Abstract

Abstract Background and study aims Colonoscopies can predict long-term prognoses in patients with ulcerative colitis (UC). Recently, a new imaging technology has been developed that uses 3 types of illumination with center wavelengths of 540 nm, 600 nm, and 630 nm. The use of both the 600-nm and 630-nm lights (Dual red imaging; DRI) is critical for identifying blood vessels in deeper tissue. The aim of this study was to evaluate the usefulness of DRI for assessing the severity of inflammation in patients with UC. Patients and methods A total of 43 UC patients were retrospectively enrolled to evaluate the endoscopic severity of 112 colon segments, and Mayo endoscopic scores, DRI scores and the severity of inflammation on a visual analogue scale (VAS) were compared. The Mayo endoscopic scores, DRI scores, and histologic scores were evaluated, and the interobserver agreement on DRI scores among 5 investigators was also assessed. The usefulness of DRI scores for predicting prognoses was also assessed in patients with clinical remission. Results The DRI scores were closely correlated with the VAS for the severity of colonic inflammation (r = 0.96) and the histologic scores (r = 0.72 – 0.8). The DRI scores had a higher rate of interobserver agreement (κ values = 0.63 – 0.88) than the Mayo endoscopic scores (κ values = 0.44 – 0.59). Inter-observer agreement between 4 non-experts was also excellent (mean κ value = 0.76, range 0.63 – 0.82). The expected time until recurrence was significantly longer in patients with lower DRI scores (P < 0.01). Conclusion DRI can be used in patients with mild to moderate endoscopic severity because it targets the deep vascular pattern. The prognosis of UC can be predicted by assessing deep vessels using DRI.

Publisher

Georg Thieme Verlag KG

Subject

Gastroenterology,Medicine (miscellaneous)

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