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Anal fistula surgery

What is an anal fistula?

An anal fistula is an abnormal connection between the lining on the inside of your anal canal (back passage) and the skin near your anus.

Most anal fistulas are caused by an abscess (a collection of pus) which has developed in your anal canal. The pus can drain away onto the skin on its own or by an operation. A fistula happens when the track, made by the pus on the way to the surface of the skin, stays open. (see fig.1)

Anal fistula  

 What are the benefits of surgery?

If the operation is successful, you should no longer have any infection or pain.

Are there any alternatives to surgery?

Most anal fistulas do not heal on their own. Surgery is usually needed to treat the problem.

What does the operation involve?

Surgery for anal fistula is usually performed under a general anaesthetic. The operation usually takes between a quarter of an hour and half an hour.

To lessen the risk of bowel incontinence (when you pass a motion without wanting to) your treatment may involve several operations over a number of months.The type of surgery you need will depend on where the fistula is.

If the fistula is below or crosses the lower part of the sphincter muscles, your surgeon will cut it open to the skin and leave the wound open so that it can heal with healthy tissue.

If the fistula has branches that pass through the upper part of the sphincter muscles, your surgeon may place a special stitch (called a seton stitch) in the fistula to allow pus to drain easily.

The fistula may be suitable for treatment with a plug made from pig-bowel tissue. Your surgeon will not need to make a cut in the skin or the sphincter muscle.

If the fistula reaches above your sphincter muscles, you may need to have a temporary colostomy (bowel opening onto the skin). However, this is not common.

What complications can happen?

1. General complications of any operation

Pain Bleeding Unsightly scarring

2. Specific complications of this operation

Difficulty passing urine Involuntarily passing wind or loose faeces Bowel incontinence

How soon will I recover?

You should be able to go home the same day or the day after.

You should rest for the first few days, walking as little as possible, to help the wound to heal. The wound often takes several weeks to heal completely and you may need to wear a pad until then. Regular exercise should help you to return to normal activities as soon as possible. Before you start exercising, you should ask a member of the healthcare team or your GP for advice.

In a small number of cases, the fistula can come back.

Summary

An anal fistula can cause continued infection and pain. Symptoms usually get worse without an operation.

Paying for your procedure

Surgery for anal fistula costs are covered by most medical insurance policies, but please check with your insurer first. If you are paying for your own treatment the cost of the operation will be explained and confirmed in writing when you book the operation. Ask the hospital for a quote beforehand, and ensure that this includes the surgeon’s fee, the anaesthetist’s fee and the hospital charge for your procedure.

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Acknowledgements

Author: Mr Jonathan Lund DM FRCS (Gen. Surg.) and Miss Gillian Tierney DM FRCS (Gen. Surg.)

Illustrations: LifeART image copyright 2007 Lippincott Williams & Wilkins. All rights reserved.

This document is intended for information purposes only and should not replace advice that your relevant health professional would give you.

Copyright © 2008 EIDO Healthcare Limited   The operation and treatment information on this website is produced by EIDO Healthcare Ltd and is licensed by BMI Healthcare.

The intellectual property rights to the information belong exclusively to EIDO Healthcare Limited.

You may not copy, print out, download or otherwise reproduce any of the information other than for your personal, non-commercial use.

The information should not replace advice that your relevant health professional would give you.

 
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