650
Participants
Start Date
January 1, 2024
Primary Completion Date
April 30, 2024
Study Completion Date
May 29, 2024
secondary colonoscopy
After the routine colonoscopy, a repeat colonoscopy of the sigmoid colon is performed
conventional colonoscopy
It starts from the rectum and progresses forward to the cecum, with observations made during withdrawal: from the cecum, ascending colon, transverse colon, descending colon, and sigmoid colon to the rectum.
Colonoscopy, Zhengzhou
Jianning Yao
OTHER