OC and flexible sigmoidscopy, which hae been the primary screening tools for the past few decades, can gie rise to complications ranging from abdominal pain to bowel perforation and bleeding.

• 过去几十年间一直作为主要检查工具的光学纤维结肠镜（OC）和乙状结肠镜会导致各种并发症：如腹痛，肠穿孔和出血。