Clinique Pasteur Tunis
Fistulography and CT fistulography
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Fistulography and CT fistulography

CT fistulography in Tunis, Tunisia · Centre Urbain Nord

Fistulography and CT fistulography in Tunis: contrast injected into the opening of a fistula to show its path, a test with little discomfort.

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What is it?

A fistula is an abnormal channel connecting an organ or cavity to the skin or to another organ. It can appear, for example, after an infection, an abscess or surgery, and often shows as a small opening that discharges. Fistulography involves gently injecting a contrast agent through the opening of the fistula, using a small soft catheter, and then taking images. With CT fistulography, the images are taken with the CT scanner, which shows the path in 3D and its relationship to nearby organs. The examination helps the surgeon understand where the fistula starts and plan its treatment.

When is it indicated?

Fistula after surgery

It shows the path of a fistula that appeared after an operation to guide its management.

Fistula after an infection or abscess

It looks for where the channel starts and whether it connects with an organ.

Planning a procedure

It gives the surgeon a map of the channel to be treated.

Preparation

1Tell us if you are pregnant or think you might be: a CT scan uses X-rays
2Tell us about any allergy (to iodinated contrast or disinfectants)
3No fasting is usually needed, unless you are told otherwise
4Bring your referral, previous imaging (CT scan, MRI, X-rays, ultrasound) and any relevant reports

Procedure

1

You are positioned on the table; the skin around the opening is disinfected

2

A small soft catheter is placed at the entrance of the fistula, usually without anaesthetic

3

The contrast agent is injected gently: a feeling of pressure is possible

4

Images are taken with X-rays or the CT scanner, while you keep still

5

A dressing is applied; you can resume your activities

Duration

About 15 to 30 minutes in total

Results

The images are analysed by a radiologist, who writes a report. The report is given to you with the images and sent to your doctor, who will explain the results and the next steps. You will be told when to expect it on the day of the examination.

Precautions and contraindications

A CT scan uses X-rays: the dose is set as low as possible while still giving useful images, and the examination is only done when it is justified
Pregnancy: a relative contraindication; a CT scan is only performed if it is essential, after medical advice
Discomfort or slight pain during the injection, short-lived
Allergic reaction to iodinated contrast: rare
Flare-up of infection along the channel: rare

Your doctor and the radiology team will inform you in detail before the examination. Feel free to ask them your questions.

This information is general and does not replace the advice of your doctor, who chooses the examination suited to your situation.

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