Procedure and Preparation for Venogram

Submitted on March 27, 2012

What Is a Venogram?

'What is a venogram' is a very common question amongst people largely unaware of the purposes and technicalities of the procedure. Also known as a phlebography, the procedure is essentially an x-ray used to gauge the flow of blood through the veins more effectively. Some situations where a venogram is used include searching for the suitable veins in preparation for certain types of surgery while it is also widely used in diagnosis of certain conditions that affect the flow of blood within the veins. Deep vein thrombosis is one of the most common conditions in which a venogram procedure helps in correct diagnosis.


When being subject to a venogram procedure, you will be asked to lie down on your back and a needle will be inserted into the targeted part of your body. A small amount of salt water fluid is then passed through the needle to ensure that there is no blockage before a contrast dye is inserted into your veins. When the dye is initially injected into your body, you are likely to experience some amount of flushing as well as a slight dizziness. A tight band may also be placed around the part of the body where the blood flow is being examined after which the x-ray machine will be activated and you will be asked to try and hold your breath during the scan. Once the scans are done, a few checks will be done by the doctor in order to gauge your heart rate, breathing and blood pressure. Your temperature and sensation in the part of the body where the dye was injected will also be examined. The dye will be naturally passed out of your body by way of the urine and you are unlikely to notice the same as it will be highly diluted. It may take up to 24 hours for all the dye to exit your body.


When deciding to go through with a venogram procedure, it is important to inform your doctor is you are allergic to any kind of medication or iodine dye. If you are pregnant, having a venogram performed is completely out of the question. Other conditions such as asthma, kidney problems and diabetes should all be highlighted. Do not eat any food for about 4 hours prior to the test while any liquid intake should be restricted only to clear fluids.