Anorectal manometry test

For symptoms such as constipation or faecal incontinence, this test evaluates the function on the muscles in your back passage and sensation of the rectum.

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What is an anorectal manometry test?

This test evaluates the function of the muscles in your back passage and sensation of the rectum.

Once in the correct position, you will be asked to perform some very simple exercises that will challenge the muscles of your back passage (e.g. squeezing and coughing) which will enable us to assess muscular strength and co-ordination.

You may be referred for this test if you have been experiencing troublesome bowel problems such as constipation or faecal incontinence.

These problems can often be caused by injuries, weakness to the anal canal muscles or problems with the wall of your back passage.

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How it works

Your physiologist will conduct the test in a private room with a chaperone, explain the process, and ask about your symptoms. You'll then change into a gown and lie on the bed for the test.

Your physiologist will insert a narrow probe (about half the width of your little finger) into your back passage. It may feel slightly uncomfortable but shouldn't be painful. Once in position, you'll perform simple exercises like squeezing and coughing to assess muscle strength and coordination.

Following this, we will slowly inflate a medical balloon attached to the tip of the probe which mimics filling of the bowel. While this is occurring, we will ask you to tell us when you feel certain sensations.

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Preparing for your test

Before you test, there are some things we ask you to do, to ensure safety and accurate results. This includes stopping certain medication and fasting for a short period.

Please read our patient information leaflet for full details.

The day of your test

You can continue taking any normal medication.
You can eat and drink as normal.
You may brush your teeth

You do not need any special preparation for your test.

Getting your test results

Anorectal manometry measures how strong the sphincter muscles are and whether they are relaxing and contracting as they should. The pressure sensors on the manometry tube allow us to measure the strength and function of your muscles.

A medical balloon attached to the manometry tube also helps us to see how sensitive your rectum is. This is a very useful test for people with faecal incontinence, constipation or prior to surgery in the pelvic floor region.

Following your test, your data will be analysed and results written up into a report within 24 hours. The report will be sent to both you and your referring consultant/doctor, who will explain the results to you in a follow-up consultation where you will be best advised on the next steps in treatment.