The practical significance of manometry in pathology of the rectum and anorectum

In practical usage, manometry of the rectum and anorectum has proven reliable in providing reproducible measurements; among these are the relaxation reflex, the anorectal pressure profile, and the squeeze pressure produced by active voluntary contraction of the anorectum. In differential diagnosis, there are three major areas of indication: (a) as a screening method in patients with fecal retention to differentiate between constipation and neural disorder; (b) evaluation of continence after surgery for anal agenesis or sphincter replacement, and (c) work-up of residual symptoms after surgery for Hirschsprung's disease. To date, many manometrically obtainable findings have attained chiefly scientific significance.