Anorectal manometry happens because your care team needs to measure how the muscles and nerves of your rectum and anus work, which an exam or a scope cannot show.
The usual reasons are constipation that has not improved with fiber, fluids, and laxatives, stool leakage, or pelvic floor muscles that squeeze when they should relax. A soft catheter with a small balloon records resting pressure, squeeze strength, how well you push, and how much stool volume you can feel. It is also used before some rectal surgery, after childbirth injury to the anal sphincter, and in children when a nerve problem such as Hirschsprung disease is being ruled out. The test takes about 30 to 45 minutes, you stay awake, and most people feel pressure rather than pain. Bring a symptom log covering stool form, frequency, straining, and leakage, since your answers shape how the results are read.
When the test is worth it
Common questions
Why does Anorectal manometry happen?
Anorectal manometry happens when symptoms point to a problem with how the muscles and nerves of your rectum and anus work, rather than with the stool itself. A thin flexible tube with a small balloon measures resting pressure, squeeze strength, sensation, and coordination while you squeeze, relax, and push. Doctors order it for constipation that has not improved with fiber, fluids, and laxatives, for stool leakage, for pelvic floor muscles that tighten instead of relaxing, and before or after certain bowel surgery. Results guide treatment, and a common next step is pelvic floor biofeedback therapy.