Cf hq290azi

All patients were administered 2–3 L of polyethylene glycol-electrolyte solution in the morning on the day of the examination as preparation. Scopolamine butylbromide or glucagon was administered in the absence of contraindications, and midazolam was used for conscious sedation only when a patient complained of discomfort or pain.
The endoscopies were performed using an electronic endoscopy system (EVIS LUCERA ELITE; Olympus Co., Ltd., Tokyo, Japan) with magnifying colonoscopy (PCF-Q240AZI, PCF-Q260AZI, CF-H260AZI, CF-HQ290AZI; Olympus). The NBI with ME observation condition was set to structure enhancement A8. The endoscopic examinations were conducted with a black soft rubber hood mounted at the tip of the endoscope for magnified observation. The lesion was visualized using incremental movements of the tip of the endoscope to bring the image into focus, with a distally attached soft black hood to stabilize the tip of the endoscope without causing mucosal injury.

All diagnostic colonoscopies were performed using magnifying colonoscopes (CF-HQ290AZI, CF-H260AZI, CF-FH260AZI, PCF-Q260AZI or PCF-Q240ZI, Olympus, Tokyo, Japan).
After white-light observation, narrow-band imaging (NBI) with magnification and chromoendoscopy was performed to determine the pit pattern of the tumor
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to assess whether it was suitable for ESD. If a diverticulum was detected, careful examination was performed to determine the size of the diverticulum and the pit pattern of the tumor involving the diverticulum. A short-type ST hood (DH-28GR Fujifilm Medical Co., Tokyo, Japan) was used to measure the size of diverticulum. Biopsy was not performed before ESD because that could cause fibrosis, which might interfere with submucosal lifting.