Sa2001 PAINLESS COLONOSCOPY: A NEW SMALL CALIBER OVERTUBE COULD IMPROVE THE CECAL INTUBATION RATE OF UNSEDATED COLONOSCOPY WITH 5.9-MM ENDOSCOPE

A 5.9-mm endoscope has many advantages in colonoscopy, which include easy navigate gastrointestinal strictures and good tolerance by patients. However, a cecal intubation rate of 73.3% and a longer cecal intubation time using a 5.9-mm endoscope are not satisfactory. To confirm the hypothesis that the 5.9-mm endoscope with an over-tube assisted could achieve a higher cecal intubation rate than that without. This was a randomized controlled clinical trial that included 107 patients. These patients were randomized into two groups: endoscope with over-tube (n = 54) and endoscope without (n = 53). The water-aided method was used during the insertion procedure. The primary outcome was cecal intubation rate. Cecal intubation timeand abdominal pain scores were also assessed. The cecal intubation rate was significantly higher in the group managed with over-tube than without (96.29% (52/54) vs 83.02% (44/53), P = 0.024). The cecal intubation time was shorter in the group with over-tube than without (11.1 ± 8.1min vs 16.5 ± 12.9min, P = 0.004). There was no difference in abdominal pain between the two groups (0(range,0-3) vs 0(range,0-3), P = 0.815). Using the system of overtube- assisted 5.9-mm endoscope, colonic intubation quality was improved satisfactorily during the procedure. It may be a promising method in colorectal cancer screening and surveillance.(a) and (b) the two X-ray images come from patients who underwent colonoscopy with an over-tube-assisted and without. (a) without assisted over-tube, the 5.9-mm endoscope failed to reach the cecum because of loop formation; (b) using assisted over-tube, the 5.9-mm endoscope successfully reached the cecum. (c) and (d) the two X-ray images come from one patient who underwent colonoscopy with an over-tube-assisted 5.9-mm endoscope. (c) before over-tube insertion, the 5.9-mm endoscope was stopped because of loop formation at the sigmoid colon; (d) after over-tube insertion in the correct location, the 5.9-mm endoscope was progressed through the sigmoid colon.View Large Image Figure ViewerDownload Hi-res image Download (PPT)