used to test for *autoimmune* [[haemolytic anaemia]] **direct** Coombs test detects Abs that are stuck to the surface of the RBCs. used to test for autoimmune haemolytic anaemia. **indirect** Coombs test detects Abs floating around in the blood against foreign blood cells. Used in prenatal testing of pregnant women and in testing prior to a blood transfusion. > note: test is NEGATIVE for microangiopathic haemolytic anaemia ![[Pasted image 20240317214831.png]]