Clinical efficacy of laparoscopic modified Parks operation on the ultra-low rectal cancer

To investigate the clinical efficacy of laparoscopic modified Parks operation on the patients with ultra-low rectal cancer.

According to the preoperative stage and intraoperative anastomotic position, 98 patients with ultra-low rectal cancer above T2 stage underwent laparoscopic Dixon operation, modified Parks operation and Miles operation, respectively. All patients were divided into 3 groups: a Dixon operation group (n=39), a modified Parks operation group (n=43) and a Miles operation group (n=16). The clinical data and postoperative follow-up results were collected, compared, and analyzed to evaluate the clinical efficacy of laparoscopic modified Parks operation.

The patients were more obese, the distance between tumor and anal margin was closer, and the operation time was longer in the modified Parks operation group than those in the Dixon operation group (all P<0.05). However, the results of bleeding volume, the number of lymph nodes and the postoperative complications in the modified park operation group were similar than those in the Dixon operation group (all P>0.05). In addition, the exhaust and defecation time and the hospitalization time were shorter, and the total cost of hospitalization was lower in the modified Parks operation group than those in the Dixon operation group (all P<0.05). Although the anal function in the modified Parks operation group was poor in the early postoperative period, it reached the same level as that in the Dixon operation group from 6 months after the treatments with the regular anal function exercise (P>0.05). There were no significant differences in tumor size, body shape, distance between tumor and anal margin, operation time, bleeding volume, number of lymph nodes detected, postoperative exhaust and defecation time between the Miles operation group and the modified Parks operation group, but the hospitalization time was shorter, the incidence of complications and the total cost of hospitalization were lower in the modified Parks operation group (all P<0.05).

Laparoscopic modified Parks operation is a safe, economical and effective anus preservation operation, which can not only save the anus for some patients who had to perform Miles operation, but also recover better and faster after operation. Although the early anal function of patients performed with the modified operation is poor, it can gradually recover to the same level as the patients performed with the Dixon operation.