Anorectal Manometry?

What Is Anorectal Manometry?

Anorectal manometry is a test that checks how well the muscles and nerves of the anus and rectum work.

During the test, a small, soft tube (about the size of a thermometer) with a tiny balloon on the end is gently placed into the rectum. The tube is connected to a machine that measures muscle strength and movement.

The balloon may be filled with air to check muscle control and feeling. The test is not painful, but you may feel pressure or mild discomfort.

Why Is Anorectal Manometry Done?

For Fecal Incontinence

Fecal incontinence means trouble controlling bowel movements. This can be small leaks or full accidents.

To hold stool, the rectum, anus, and nerves must work together. Strong muscles help hold stool in, and good feeling helps you know when you need to go.

If muscles are weak or the feeling is poor, stool may leak. This test helps find these problems.
Treatments like biofeedback and special exercises can help make the muscles stronger and improve control.

For Constipation

Constipation means bowel movements are hard to pass or occur infrequently.

Some people with constipation have muscles that do not relax when trying to have a bowel movement. This makes it hard for stool to come out.

Anorectal manometry can find this problem. Biofeedback therapy can help train the muscles to relax the right way.

How Do I Prepare for the Test?

• Tell your doctor about all medicines you take and any allergies

• Your doctor will tell you if you should take your medicines as usual

• The rectum should be empty for the test

• You may be asked to use an enema at home before your appointment

What Happens During the Test?

The test takes about 30 minutes.

• You will change into a gown

• You will lie on your left side

• The tube is gently placed into the rectum

• The balloon may be filled with air

• You may be asked to:

  • Squeeze (like holding stool in)

  • Relax

  • Push (like having a bowel movement)

The machine measures how your muscles work during each step.

After the test, you can go home and return to normal activities.

How Will I Feel After the Test?

• You may feel mild discomfort

• A small amount of bleeding can happen

• This should go away in 1–2 days

📞 Call your doctor if pain or bleeding lasts more than 3 days.

Are There Any Risks?

Anorectal manometry is very safe.

Rare risks include:

• Bleeding

• A small tear in the rectum

If you are allergic to latex, tell the nurse so a latex-free balloon is used.

Key Points to Remember

✅ The test checks how bowel muscles work
✅ It helps find causes of constipation or leakage
✅ The test is quick and safe
✅ Treatment can help if problems are found