A transfusion of 1.5U is usually for red blood cells, 1U of red blood cells is about 200ml and 1U of red blood cells raises about 5g of red blood cells. For example, if the red blood cells were 80g/L before the transfusion, and the result is reviewed again after 1.5U of red blood cells, the result should theoretically be 87.5g/L. Other blood products include: platelets (the amount of transfusion is usually referred to as the number of servings, for example, 1 or 2 servings of platelets), plasma (the amount of transfusion is directly the number of milliliters, for example, 200 ml of frozen plasma transfusion).