The goal of this clinical trial is to determine whether closing the pelvic floor peritoneum during laparoscopic radical resection of mid-low rectal cancer can reduce the incidence of postoperative ileus. This study will also assess the impact of pelvic floor peritoneal closure on patient recovery and quality of life after surgery. The main questions it aims to answer are:
1. Can closing the pelvic floor peritoneum reduce the incidence of ileus within 30 days after surgery in patients with mid-low rectal cancer?
2. What is the impact of pelvic floor peritoneal closure on postoperative complications such as anastomotic leakage and pelvic infection?
3. How do the two surgical approaches differ in their effects on patients' postoperative anal function, urinary function, and quality of life?
Researchers will compare two approaches after laparoscopic radical resection for rectal cancer: closing the pelvic floor peritoneum versus not closing it, to observe which method more effectively prevents postoperative ileus.
Participants will:
1. Undergo laparoscopic radical resection with anus preservation for mid-low rectal cancer
2. Receive either pelvic floor peritoneal closure or non-closure treatment based on random assignment
3. Attend regular follow-up visits to evaluate intestinal function recovery and occurrence of complications
4. Complete quality of life questionnaires (EORTC QLQ-C30 scale) at 6 months after surgery