This is a test performed to evaluate patients with constipation or fecal incontinence. This test measures the pressures of the anal sphincter muscles, the sensation in the rectum, and the neural reflexes that are needed for normal bowel movements. You will be asked to change into a hospital gown. A nurse will explain the procedure to you and answer any questions you may have related to the procedure. The test will be performed by 2 nurses or a nurse and a chaperone will present due to the sensitive nature of the test. You will be asked to lie on your left side. The probe is about the size of a thermometer. The probe has sensors on it to detect pressure. With the probe in place, the nurse will instruct you to squeeze, relax, and push or bear down at various times. The anal sphincter muscle pressures are measured during each of these maneuvers. After this has been done, the probe will be removed. If ordered, a catheter that has an inflatable balloon on the end of it and will be filled with a small amount of water will be inserted into the rectum. You will be asked to expel the balloon as if it were a bowel movement. If you are unable to do so, the balloon will be deflated and carefully removed. Once this has been completed, you may drive yourself home and go about your normal activities. The test takes about 30 minutes to complete. The study is interpreted by gastroenterologists who have expertise in diagnosing and treating gastrointestinal motility disorders. It will take about 2 weeks for results to be completed.
Risks: Anorectal manometry is a safe, low risk procedure and is unlikely to cause pain. Complications are uncommon, however there is a rare risk of perforation (tearing) and/or bleeding. Equipment failure is unlikely but does remain a remote possibility.
lubiprostone, which is FDA approved for OIC