Subtotal colectomy with ileorectostomy has been proposed for the manag
ement of colon inertia-type constipation. However, many patients exper
ience frequent bowel movements, watery diarrhea, or both after such a
treatment. The purpose of this study is to determine the proper colect
omy with which to treat colon dysmotility constipation without the neg
ative side effects of frequent bowel movements, watery diarrhea, or bo
th. Forty idiopathic constipation patients were studied. All of the pa
tients showed a prolonged right or left colon transit time and normal
transit time of the sigmoid and rectum. They received different types
of colectomies (left, right, and subtotal) according to the distributi
on or accumulation of markers in the colon. Within 3 months of surgery
, all of the patients experienced a dramatic improvement of their symp
toms without frequent bowel movements or watery diarrhea. No significa
nt complications developed after surgery. All the patients were follow
ed up for at least 2 years. Most of them (37 cases) still had satisfac
tory bowel movements and no other constipation symptoms. However, 3 of
the 40 cases developed symptoms of constipation 11/2 to 2 years after
surgery. They all received subtotal colectomy with ileorectal anastom
osis subsequently. They reobtained satisfactory bowel movements and ex
perienced a subsidence of other constipation symptoms 3 months later.
These results suggest that directed segmental colectomy can improve co
lonic inertia constipation without the consequence of frequent bowel m
ovements and diarrhea.