Polypectomy surgery usually requires a check for infectious diseases. Polypectomy is an invasive procedure, and polyps can grow in all parts of the body. Polyps are generally benign lesions, and it is a relatively minor surgery. Generally, before polypectomy, it is necessary to routinely screen for infectious diseases, such as the need to improve the Hepatitis B penta, Hepatitis C antibody, AIDS antibody, syphilis antibody, etc., screening for hepatitis B, hepatitis C, AIDS, syphilis and other diseases transmitted through the blood. Meanwhile, before polypectomy, blood test, coagulation function, electrocardiogram, etc. are usually checked to clarify the patient’s coagulation function and cardiac condition, in order to assess the patient’s indications for the surgery and to deal with the related complications in a timely manner.