A venogram is a procedure that provides X-ray visualization of the veins, particularly in the lower extremities (legs). Contrast material, also known as X-ray dye, is injected that is visible on the X-ray. The contrast dye allows the doctor to evaluate the size and condition of the veins. A venogram may be used for diagnosing deep vein thrombosis (DVT), although ultrasound is usually used for this. Venography can also be used to diagnose other abnormalities.
Reasons for the procedure
A venogram is used to confirm a diagnosis of DVT and to distinguish clot formation from other venous obstructions.
Risks of the procedure
If you are pregnant or suspect that you may be pregnant, you should notify your healthcare provider. Radiation exposure during pregnancy may lead to birth defects.
Because the contrast is used, there is a risk of allergic reaction to the dye. Patients who are allergic to or sensitive to medications, contrast dye, or iodine should notify their doctor.
Patients with kidney failure or other kidney problems should notify their doctor. In some cases, the contrast dye can cause kidney failure, and it is especially important to let your doctor know if you are taking Glucophage (a diabetic medication).
Notify your doctor if you have a history of bleeding disorders or if you are taking any anticoagulant (blood-thinning) medications, aspirin, or other medications that affect blood clotting.
For certain individuals, a venogram may be contraindicated. These include persons with a known allergy to contrast dye, severe congestive heart failure, and severe pulmonary hypertension.
There may be other risks depending on your specific medical condition. Be sure to discuss any concerns with your doctor prior to the procedure.
Certain factors or conditions may interfere with the accuracy of a venogram. These factors include, but are not limited to, the following:
Before the procedure
During the procedure
A venogram may be performed on an outpatient basis or as part of your stay in a hospital. Procedures may vary depending on your condition and your doctor’s practices.
Generally, the venogram follows this process:
After the procedure
Following the procedure, your vital signs (heart rate, breathing rate, and blood pressure) will be monitored frequently and then at intervals determined by your doctor. The peripheral pulses in your feet, as well as the temperature, color, and sensation in your legs, will be checked. The injection site will also be monitored for redness, warmth, swelling, and tenderness.
Normal activities and diet can be resumed after the procedure as directed by your doctor.
Drink plenty of fluids to prevent dehydration and to help pass the contrast dye.
Notify your doctor to report any of the following:
Your doctor may give you additional or alternate instructions after the procedure, depending on your particular situation.
Dr. Wasey Mahmud Jilani
MBBS, FCPS, FVIR,
Fellowship in Diagnostic Radiology,
College of Physicians & Surgeons Pakistan,
Fellowship in Vascular Interventional Radiology
Monday to Saturday
10 am to 5 pm
Nasir / Salman
(+92)213 529 2707