Clinical observation on anorectal manometry in different periods after Dixon's operation

Objective To investigate the function of the rectum and anal canal in patients with rectal cancer in different periods after Dixon's operation. Methods The pressure of anorectum in 64 patients with rectal cancer were determined in different periods before and after Dixon's operation, using anorectal maometry with four passage water infusing. Results At postoperative 3 months, 6 months and one year, the anal sphincter resting pressure were significantly lower than that at preoperative (P0.01), the maximal squeeze pressure and maximal squeeze time were decreased compared with that at preoperative (P0.01), and the ability of controlling defecation was weaker than that at preoperative (P0.05). Conclusion The defecation controlling ability of anal canal decreases in patients with rectal cancer after Dixon's operation, but the ability would increase along with time.