Diagnostic tests for venous diseases
Primary diagnosis of a venous disease can be made from a clear medical history and a thorough medical examination. In addition to this, certain procedures can be used to make a complete diagnosis. The most common test performed is Venous colour Doppler test
- How is a Venous Colour doppler test performed?
This is the most commonly used non-invasive diagnostic test also known as Colour doppler test. The patient is asked to be in standing position during this text because in lying down position, the vein dilatation is reversed and you may sometimes get a false negative report.
- The doctor checks for dilated veins, incompetent junctions, DVT, reflux time, etc.
- This helps to assess the state of veins and blood flow. The term duplex means that two methods, Doppler, and B-mode ultrasonography are used for the procedure. The B mode collects the images of the vein to be studied and the Doppler mode studies the flow and velocity of the blood in the vein.
- A contrast dye is injected into a vein and a CT scan is used to study the structure of the vein. The dye makes the blood vessels opaque which makes it easier for the specialist to visualize and assess them.
- Physiological tests
- Test like venous refilling time, maximum venous outflow, calf muscle pump ejection fraction are important in assessing the cause and severity of venous insufficiency.
- Venous plethysmography
- This is a non-invasive test that helps to measure underlying mechanisms of chronic venous insufficiency. It uses infrared light to evaluate capillary filling during physical activity and exercise. An increased capillary filling is indicative of incompetent veins.