Advantages of electronic rectosigmoidoscopy Electronic rectosigmoidoscopy is convenient for patients, especially for those who are too old and frail to tolerate full colonoscopy, and has obvious advantages. It is very effective in distinguishing bleeding hemorrhoids from bleeding rectal cancer, and it is also clinically important for pathological diagnosis of rectal mass biopsy. Electronic proctoscopy has excellent professional performance and simple and practical operation method, which fully meets the requirements of quick, safe and comfortable clinical examination. The examinee does not need to prepare in advance and can be examined as he/she arrives; disposable sheaths are used during the examination to avoid cross infection, which greatly improves safety; the physician can directly observe the lesions from the anus to the whole rectum and the distal sigmoid colon through video during the examination, and more than 70% of colorectal cancers occur in this area; the images are real and clear to ensure the accuracy of diagnosis; especially for screening, the rate of missed detection can be greatly reduced; the examination time is short, which reduces the time required for the examinee to be examined. The examination time is short, reducing the degree of discomfort for the patient.