DCT lab test or Direct Coombs Test is performed to detect the cause of anaemia due to autoimmune disorder. Normally, pale skin, cold hands and feet, shortness of breath and fatigue are common symptoms of anaemia. Doctors often advise DCT test to patients with persisting anaemia. The DCT test unravels the cause of such persistent anaemia. Many diseases and prolonged use of strong drugs produce excessive antibodies in the body. The antibodies stay bound to the surface of the red blood cells (RBCs) and in course of time, these antibodies destroy the RBCs causing severe anaemia. The DCT test helps to determine whether these antibodies are destroying the RBCs.