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

Inclusion criteria

• Patients voluntarily joined this study and signed an informed consent form；
• Age: 18-75 years old；
• 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)；
• Complete colonoscopy and colonoscopy biopsy, and the pathology is confirmed to be adenocarcinoma/high-level intraepithelial neoplasia；
• Enhanced CT or MRI examination before surgery, indicating that the tumor diameter is ≤5.0 cm；
• Preoperative staging: cT1-3NanyM0;
• Strictly follow the colorectal day surgery plan, and micro-laparoscopic radical colorectal cancer treatment can be adopted；
• There are no contraindications for abdominal wall nerve block anesthesia or non-opiate analgesic drugs;
• Does not require conventional anticoagulant therapy or antiplatelet therapy；
• 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.

Exclusion criteria

• Elderly patients with multiple basic diseases；
• Moderate to severe anemia；
• Severe hypoproteinemia；
• Diabetes that is not well controlled；
• Contraindications to laparoscopic surgery；
• Cases of emergency surgery due to acute intestinal obstruction, perforation or bleeding；
• Patients with distant metastases；
• Patients who are unwilling to sign informed consent or follow-up according to the research plan；
• People with a history of psychotropic drug abuse and unable to quit or have mental disorders；
• Patients who live alone or in psychosocial isolation, patients who cannot understand the postoperative nursing process；
• After the operation, the place of residence is far away from the treated hospital or patients with insufficient medical resources and inconvenient transportation；
• According to the judgment of the researcher, there are concomitant diseases that seriously endanger the safety of the patient or affect the completion of the patient\'s research.