Endoanal ultrasound scan

What is an endoanal ultrasound scan?

This test looks at the structure of the muscles in your back passage, and can see if there is any structural abnormalities or damage to the muscles.

You may be referred for this test if you have been experiencing troublesome bowel problems. These problems can often be caused by injuries or weakness to those muscles or problems with the wall of your back passage (anal canal).

How does the endoanal ultrasound scan work?

Your physiologist will insert a narrow probe (about the width of your little finger) into your back passage. It may feel uncomfortable when the tube is inserted, but it should not be painful. You may feel embarrassed, but we understand this and will help you feel at ease throughout.

The screen connected to the probe will enable the physiologist to view images of the area. It also allows pictures to be taken of your muscles and surrounding tissues in your back passage.

How much does the endoanal ultrasound scan cost?

If you are paying for this test yourself and not through private medical insurance, the cost will be £400.

How do you prepare for an endoanal ultrasound scan?

You do not need any special preparation for your appointment.  You may eat and drink as normal and continue with any normal medication.

What does the endoanal ultrasound scan diagnose?

This test is an examination of your back passage that allows us to see the muscles involved in passing stool and the tissues that surround these.

We can assess whether there are any structural abnormalities or damage to the muscles of your back passage.

Following your test, your data will be analysed, and results written up into a report. 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.

Information leaflet
Information leaflet

Find more information about this test using our PDF download.


Pleasant and knowledgeable staff that made the experience more enjoyable than it should be!

London Patient