Endo-Anal Ultrasound

An endo-anal ultrasound is a minimally invasive procedure which involves assessment of the anatomy of the anal canal. The examination is performed using an ultrasound scanner placed within the anal canal. A picture is generated which allows identification of the muscles in the anal canal which is then used to help determine the best treatment for you.

Why is Endo-Anal Ultrasound needed?

An endo-anal ultrasound helps identify if there are any problems with the muscles of the anal canal. Some of the reasons your Surgeon may recommend this test are to:

  • Assess anal sphincter muscles in the case of faecal incontinence
  • Assess anatomy of fistula-in-ano

What is the preparation for an Endo-Anal Ultrasound?

You can eat and drink as normal before your appointment. There is no bowel preparation required.

What happens during an Endo-Anal Ultrasound?

You will be asked to change your clothing to a patient gown and lay on your left side on the examination bed. The Nurse Specialist or Doctor may conduct an examination of your anal canal and rectum before the investigation. The endo-anal ultrasound scanner will be inserted into the anal canal (approximately 5cm). Several images will be taken which allows identification of the muscles of the anal canal. Once the endo-anal ultrasound scan has finished you will be able to get dressed and return to your normal activities

You will not be sedated for your endo-anal ultrasound so you will be able to travel or drive as usual. The ultrasound should be completed within 5 – 10 minutes, although your complete appointment could take up to 30 minutes.

What happens after an Endo-Anal Ultrasound?

You may return to normal diet and carry out your usual activities.

What are the risks associated with an Endo-Anal Ultrasound?

Endo-anal ultrasound is generally a very safe and simple test.

  • Patients who have a latex allergy are asked to inform the MacMurray Centre before they attend so we can prepare the examination room.
  • Endo-anal ultrasound is not usually performed within the first three months of pregnancy. Please inform the department so an alternative appointment can be arranged if this applies to you.
  • There is a very small possibility that there is a technical failure requiring repeating the test.
  • There are no known risks, or complications from an endo-anal ultrasound. Some patients find the procedure a little uncomfortable, although it should not be painful.

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