What is anorectal manometry?
Anorectal manometry is a test used to evaluate how well the muscles and nerves in the rectum and anus are working. It measures the strength of the anal sphincter muscles, rectal sensation, and the reflexes needed for normal bowel movements.
This test is commonly used to evaluate:
- Constipation
- Fecal incontinence (loss of bowel control)
The results help determine how well the muscles tighten and relax during bowel movements and can guide treatment options such as pelvic floor therapy or biofeedback.
Preparing for the test
- Use one to two Fleet® enemas about 2 hours before your test. These can be purchased at a pharmacy or grocery store.
- Do not eat or drink for at least 2 hours before the test.
- If you have diabetes, you may need to adjust your medications. Please follow your provider’s instructions.
What is done during the test?
You may be asked to change into a gown. You will be positioned lying on your left side for the test.
A small, flexible tube (catheter) with a balloon at the tip is gently inserted into the rectum. The catheter is connected to a machine that measures muscle pressures.
During the test, you will be asked to:
- Squeeze as if trying to prevent a bowel movement
- Relax
- Push or bear down as if having a bowel movement
The balloon at the end of the catheter will be used to assess sensation and reflexes. You will also complete a balloon expulsion test, which measures how well you are able to pass a small balloon from the rectum.
In some cases, additional testing may be performed to evaluate nerve function. This involves gentle stimulation to assess how the nerves communicate with the anal sphincter muscles.
The test typically takes about 30 minutes. After the test, you may return to your normal activities. If you experience any unusual symptoms or side effects after your test, contact your doctor.
Where do you go for your test?
If you are being seen at National Jewish Health, please check in at the front desk of the Minimally Invasive Diagnostic Center (MIDC) on the day of your scheduled test.
If you have questions before or during your test, please call 303-270-2424.
Appointment changes
If you need to make changes to your appointment, please call 303-398-1355, option #4.
When will I get my results?
Your test results must be reviewed, analyzed, and interpreted by a provider. This process typically takes two to four weeks. After the results are finalized, a member of your care team will contact you to review the findings.
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