The test is performed when individual has symptoms of blood clot, especially if it is recurrent. The signs and symptoms depend on the location where the clot is formed:
- In deep veins:
- Leg pain or tenderness, usually one leg
- Swelling of legs
- Discolouration in skin of legs
- In lungs:
- Sudden shortness of breath.
- Laboured breathing
- Blood stained cough
- Lung related chest pain
It is also performed when a women has recurrent miscarriages.