Anorectal manometry checks how well the muscles and nerves in the rectum and anus work during bowel movements. Doctors order it for constipation, fecal incontinence, and other bowel control problems that need a closer look.
Preparation is not the same for every patient. Your provider will base the instructions on your health history and the reason you are being tested, so two people might receive slightly different guidance for the same procedure.
Medications Matter More Than People Expect
List every medication, supplement, and over-the-counter product you take, and bring that list to your provider before the test. Certain drugs slow or speed up bowel activity, which can throw off the results if left unchecked.
Never adjust a prescription on your own before this test. If you take anything for constipation or diarrhea, ask your provider directly whether to continue it in the days before your anorectal manometry appointment.
Eating and Drinking Rules Depend on the Clinic
Some clinics allow a normal diet right up until the test. Others ask patients to change what they eat or drink a day or two beforehand, so the rules genuinely differ from one provider to the next.
Confirm your specific plan ahead of time rather than assuming. A quick phone call the week before saves confusion on the actual day of testing.
An Enema May Be Part of the Process
Clearing the rectum beforehand often improves the accuracy of the exam, so many providers recommend an enema. Follow the product directions closely, especially around timing, since using it too early or too late can affect the results.
Skip any additional laxatives or enemas beyond what your provider suggests. Adding extra steps on your own can interfere with the readings rather than help them.
Dress With the Exam in Mind
You will need to undress from the waist down during the test, so choose clothing that comes off easily. This sounds minor, but patients who wear simple, adjustable outfits tend to feel less rushed during the appointment.
What Actually Happens During the Test
A provider inserts a thin, flexible catheter into the rectum once you are positioned and ready. The catheter connects to equipment that records pressure changes as your muscles move. At different points, you will be asked to squeeze, relax, or bear down.
Each action gives the equipment a different measurement, building a fuller picture of how your muscles function. Sedation is not typically necessary. Most patients leave the appointment and return to their day without any lingering effects from the procedure itself.
Write Down Questions Before You Arrive
Unclear instructions cause more stress than the test itself. If anything about medications, diet, or the enema feels confusing, call your provider before the appointment rather than guessing.
Schedule Your Anorectal Manometry Test
Anorectal manometry evaluates muscle and nerve function in the rectum and anus, and careful preparation, covering medications, diet, and sometimes an enema, leads to more reliable results.
At Gastroenterology Diagnostic Center, our team supports patients through this process from start to finish. Call (281) 357-1977 to schedule an appointment or ask our staff what to expect before your visit.