Clinical Research on the Treatment Model of Ambulatory Surgery for Colorectal Cancer

Inclusion Criteria

• •1. Patients voluntarily joined this study and signed an informed consent form；
• •2. Age: 18-75 years old；
• •3. The patient should have a good general condition and no serious internal medicine comorbidities (ASA classification of the American Anesthesiology Association is Grade I\~III)；
• •4. Complete colonoscopy and colonoscopy biopsy, and the pathology is confirmed to be adenocarcinoma/high-level intraepithelial neoplasia；
• •5. Enhanced CT or MRI examination before surgery, indicating that the tumor diameter is ≤5.0 cm；
• •6. Preoperative staging: cT1-3NanyM0;
• •7. Strictly follow the colorectal day surgery plan, and micro-laparoscopic radical colorectal cancer treatment can be adopted；
• •8. There are no contraindications for abdominal wall nerve block anesthesia or non-opiate analgesic drugs;
• •9. Does not require conventional anticoagulant therapy or antiplatelet therapy；
• •10. Relatives or co-residents should be able to provide 24 hours of full escort within at least 72 hours after the operation, the place of residence is not more than a 30-minute drive from the hospital, and they can understand and follow the phased treatment plan of diet, analgesic drugs, etc. after the operation.