Comparison of Postoperative Anal Function Between Different Anastomosis Techniques(Parks Versus Bacon) in Low Rectal Cancer: A Prospective, Multicentric and Randomized Controlled Study
The goal of this study is to compare the postoperative anal function of patients with ultra-low rectal cancer after Parks operation (colon anal anastomosis) and Bacon operation (colon anal pull-out anastomosis), which may provide clinical evidence for the improvement of anal function and quality of life. The main questions it aims to answer are: the difference of anal function 1 year after surgery type of study: clinical trial participant population: patients with low rectal cancer Participants will receive Parks operation of Bacon operation If there is a comparison group: Researchers will compare Parks and Bacon operation to see if the anal function 1 year after surgery is different.
• Men or women, aged between 18 and 75 years;
• Pathological diagnosis of rectal cancer before operation, with the distance from the lower edge of the tumor to the dentate line ≤ 3cm by MR imaging;
• No local complications (including complete/ incomplete obstruction, active bleeding, local invasion of sphincter or levator ani, etc.) before operation;
• Suitable for anal preservation surgery discussed by MDT;
• Adequate bone marrow, liver, renal and cardiac function meeting the requirements of surgery and anesthesia;
• R0 resection is expected technically;
• Provision of written informed consent.