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Endoanal ultrasound

Ultrasound imaging of the anal sphincter complex

A type of medical investigation which images the structure of the anal canal

About

An endoanal ultrasound is used to demonstrate either childbirth trauma or post surgical trauma to the sphincter. This is a muscle that maintains constriction of a natural body passage, such as the anus. It may also show abnormal thinning of an intact internal sphincter, associated with incontinence.

Need to know

  • What happens icon plus

    You will be asked to change into a gown before the ultrasound is performed. In order for the consultant to carry out the test, you will be asked to lie on a couch on your left side. They will explain to you what they are doing at each stage of the test. Once you are comfortable, your consultant will insert a fine tube into your anus (back passage). The tube will be attached to a lead which is connected to a machine. The consultant will view the area and take images at different positions. You should feel very little, if any, discomfort during this test.
  • How to prepare icon plus

    If instructed by your consultant, you may be required to stop all laxative medication and the use of suppositories prior to your appointment. Otherwise, you do not need to do anything before your arrival at the hospital. You can eat and drink as normal and continue to take any medication that you would normally take. There is no reason why the tests should have any adverse effects but you are welcome to bring along somebody for support.
  • Afterwards icon plus

    After the test you will be allowed to rest for a while and then you will be allowed to go home. Since a sedative is not administered during the test you do not need anyone to accompany you home but you can ask a family member or friend to pick you up if you would prefer. You may experience a little discomfort in the lower part of the tummy or back passage after the test for a few hours but this usually settles down. Bleeding through the back passage is very unusual. If you do experience any unusual symptoms you can contact our team for immediate advice.
Consultant in theatres

Our consultants

We're proud to work with leading experts across a range of medical fields, whose skills are matched by their integrity and compassion.

Our facilities

From complex surgery to straightforward procedures, we provide exceptional care across our network of hospitals, outpatient centres and specialist clinics.

  • facility-pgh-hero-579x579

    The Princess Grace Hospital

    42-52 Nottingham Place

    London W1U 5NY

    Appointments 0207 908 8001
    Enquiries 0207 486 1234

  • Male-receptionist-greets-male-visitor

    London Digestive Centre

    41 Welbeck Street

    London

    W1G 8DU

    Call 020 7908 8003
    Opening hours Monday - Friday: 8am - 8pm

  • Hero-facility-LDH-group-579x579

    London Digestive Health

    2nd Floor

    41 Welbeck Street

    London W1G 8DU

    Call 020 7616 7645
    Opening hours Monday - Friday: 8.30am - 7pm

  • London Digestive Health

    London Digestive Surgery

    41 Welbeck Street

    London

    W1G 8DU

    Call 020 3131 5319
    Opening hours Monday - Friday: 8am - 8pm
    All of our upper GI and colorectal consultant are at our Chiswick clinic on Saturdays

  • The Princess Grace Hospital Facility

    The Endoscopy Centre

    42-52 Nottingham Place

    London

    W1U 5NY

    Call 020 7079 4344

This content is intended for general information only and does not replace the need for personal advice from a qualified health professional.
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