Ileorectal intussusception compared to end-to-end ileorectal anastomosis after laparoscopic total colectomy in slow-transit constipation

Although end-to-end ileorectal anastomosis (EEIRA) following total colectomy is the most effective surgical treatment for slow-transit constipation (STC), frequent diarrhea and urgent defecation is often not resolved for over 6 months after surgery. This study aimed to compare defecating frequency, surgical complications, and quality of life after ileorectal intussusception anastomosis (IRIA) or EEIRA following laparoscopic total colectomy for treatment of STC. This is a retrospectively collected and analyzed data set of 100 patients with consecutive STC treated by the same medical team at Tianjin Union Medical Center from August 2016 to July 2021. Out of 100, 70 cases underwent IRIA, and 30 cases underwent EEIRA. The incidence and mortality of postoperative complications, gastrointestinal quality of life score (GIQLI), and fecal incontinence quality of life score (FIQL) were assessed at a median 3-year postoperative follow-up. The frequency of defecation, use of antidiarrheal drugs, and Wexner constipation score were assessed at the 12-month follow-up. A total of 100 patients (83 women and 17 men) were enrolled; no patients died during the study. At the 12-month follow-up, 19 patients (19/30, 63,33%) in the EEIRA group defecated >10 times after surgery. At 7 days, 1 month, 2 months, 3 months, 6 months, and 12 months after operation, there were statistically significant reductions in defecation times in the IRIA compared to the EEIRA group (all P < 0.05). ANOVA showed that the number of defecations decreased significantly in the IRIA compared to the EEIRA group (P < 0.00). Follow-up at the a median of three years showed a significant difference in the prevalence of short-term (P = 0.03) and long-term complications (P = 0.01) between the IRIA and EEIRA groups. The IRIA group had significantly improved FIQL (P = 0.03) and GIQLI scores (P = 0.01) compared to the EEIRA group at the median 3-year postoperative follow-up. After a median of three years, IRIA results in a lower prevalence of surgical complications than EEIRA and significantly improves the quality of life for STC patients by reducing defecation frequency within 12 months postoperatively.