Comparison of Postoperative Anal Function Between Parks and Bacon Techniques in Low Rectal Cancer

Exclusion Criteria

• •1. Previous history of malignant colorectal tumors;
• •2. Complications such as obstruction and gastrointestinal bleeding that need an emergency operation;
• •3. Unachievable R0 resection due to invasion of adjacent organs by primary tumor;
• •4. Multiple primary tumors;
• •5. History of other malignancy;
• •6. Participation in other clinical trials within the previous 4 weeks of enrollment;
• •7. ASA physical status score ≥ IV level and/or ECOG performance status ≥ 2;
• •8. Intolerance of surgery due to liver, renal, cardiopulmonary or coagulation dysfunction, or underlying diseases;
• •9. History of serious mental disorders;
• •10. Women in pregnancy or lactation period;
• •11. Uncontrolled infection before operation;
• •12. Unsuitable to be included due to other clinical and laboratory conditions by the judgement of investigators.