Three ways. 1. History and physical exam. If your history and examination are suspicious that it might be a dvt, then you need a 2. D-dimer. A blood test is done. If it is very low, you don't have a dvt. If it is high you might have a DVT and you need an 3. Ultrasound scan. As dr. Salartash said, this is the gold standard test. The ultimate way to check for a DVT is ultrasound.
DVT. DVT most commonly diagnosed by ultrasound. Sometimes they are seen on CT scanning which is the best test to see if a DVT has travelled to the lungs.
Dvt. The most simple and best test to diagnosis of DVT is a venous Doppler-sonogram.
Scan. A patient must undergo non-invasive radiological testing in order to confirm a diagnosis of dvt. For example, an ultrasound would detect DVT in a patient.
Venous Doppler. The physical examination of the leg is notoriously inaccurate for the diagnosis if DVT. In the appropriate clinical setting (immobilization, recent surgery), a venous Doppler would be the necessary test.
DVT diagnosis. The gold standard to diagnose DVT from the groin to the calf is a venous duplex exam. D- dimer is a nonspecific test that may add some information.. A positive test can be due to many things but a negative test times two is good evidence that there is no DVT. DVT above the groin is best diagnosed by either venous phase CT or MRV.