Clinique Pasteur Tunis
Venography (phlebography)
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Venography (phlebography)

Venography in Tunis, Tunisia · Centre Urbain Nord

Venography in Tunis: X-ray of the veins of one or both limbs after injection of iodinated contrast, in specific cases.

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What is it?

Venography (phlebography) is an X-ray examination of the veins. An iodinated contrast agent is injected into a small vein in the foot or hand, then images show its path through the veins of the leg or arm. It may cover one limb or two. Today, Doppler ultrasound, which uses no X-rays or needles, has largely replaced it for detecting a deep vein thrombosis or studying varicose veins. Venography remains useful in specific cases, for example before certain procedures on the veins or when ultrasound is not enough.

When is it indicated?

Before certain vein procedures

It provides an accurate map of the veins before a procedure, on medical advice.

Inconclusive Doppler ultrasound

When ultrasound cannot give an answer, it shows the inside of the veins directly.

Vein abnormality or compression

It may show a narrowed, compressed or malformed vein.

Preparation

1Tell us before the examination if you are pregnant or think you might be
2Tell us about any allergy or past reaction to an iodinated contrast agent, kidney disease, diabetes or thyroid problem; a blood test (creatinine) may be requested
3If you take metformin (for diabetes), ask your doctor's advice: it may be stopped temporarily around an iodinated contrast injection
4Bring any Doppler ultrasound scans already done
5No fasting is usually needed, unless instructed otherwise

Procedure

1

You remove clothing and metal objects from the area being examined, in a changing cubicle

2

You lie on the X-ray table, sometimes slightly tilted

3

A small needle is placed in a vein in the foot or hand; a tourniquet may be tightened to direct the contrast

4

The contrast is injected and you may feel warmth in the limb

5

The radiologist follows the contrast agent live on a screen (fluoroscopy) and takes images at the right moments

6

After the examination, drink plenty of fluids and move the limb to flush out the contrast

Duration

About 30 minutes per limb

Results

The images are analysed by a radiologist, who writes a report. It 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 on the day of the examination when the results will be ready.

Precautions and contraindications

Higher X-ray dose than a plain X-ray, because images are taken over several minutes, but kept as low as possible
Allergic reaction to iodinated contrast: rare and usually mild (redness, itching); severe reactions are exceptional and the team is prepared to manage them
In case of kidney failure, the iodinated contrast injection is avoided or adjusted by the doctor
Pain or a small bruise at the injection site; rarely, inflammation of the vein after the examination
Not performed during pregnancy, except in specific medical circumstances

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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