[Sphincter-preserving surgery for lower rectal cancer aimed at improving postoperative bowel function].
Much attention has been focused on sphincter-preserving surgery for patients with lower rectal cancer, leading to renewed interest in the outcome of postoperative bowel function. Some patients who undergo sphincter-preserving surgery experience bowel dysfunction, such as frequent stools, severe constipation, soiling, and incontinence. These symptoms were thought to be correlate with lower resting pressure, lower rectal compliance, sensory disturbance of the anal canal, spasm, and delayed transit in the colon above the anastomosis. To improve postoperative bowel function, reconstruction with the colonic J-pouch has been performed, which results in a satisfactory functional outcome. About 80% of patients with a J-pouch were able to tolerate over 10 minutes after feeling the desire to defecate. An anorectal manometric study showed no abnormal spastic movement of the neorectum and a transit study showed that the J-pouch group was superior to the straight group with respect to the smoothness of movement of radiopaque markers from the cecum to anal ring, although a small number of markers were retained in the colonic J-pouch. Patients who received a colonic J-pouch had fewer defecation problems in daily life. Further study is need to improve postoperative bowel movement in patients who undergo sphincter-preserving surgery.
Department of Surgery, Hirosaki University School of Medicine, Japan.
T
T
Morita
J
J
Suzuki
T
T
Yoshizaki
Y
Y
Kimura
F
F
Nakamura
T
T
Itoh
A
A
Murata
T
T
Nishi
M
M
Koyama
M
M
Sasaki
D001003:Anal Canal / Q000502:physiology*; D003672:Defecation / Q000502:physiology*; D006801:Humans; D011183:Postoperative Complications / Q000517:prevention & control; D016737:Proctocolectomy, Restorative / Q000379:methods*; D012004:Rectal Neoplasms / Q000601:surgery*