The MMR immunity test is used to evaluate immunity to Measles, Mumps and Rubella. The MMR immunity test is often referred to as a titer test and is often necessary for students or when no vaccination records can be provided.
Most doctors only give platelet transfusions in cases where the patient is actively bleeding and the blood won't clot. The reason is that this treatment is of limited benefit and only lasts a very short time. The problem has to do with the life of the cells. Unlike red blood cells, which on average live about 120 days, platelets on average live only eight days. When you get a transfusion of blood from someone else, some of those cells are very old and some are brand-new, so you have to assume that the average platelet's going to last only four days.
When your blood has too few platelets, mild to serious bleeding can occur. Bleeding can occur inside your body (internal bleeding) or underneath your skin or from the surface of your skin (external bleeding). A normal platelet count in adults ranges from 150,000 to 450,000 platelets per microliter of blood.A platelet count of less than 150,000 platelets per microliter is lower than normal. If your blood platelet count falls below normal, you have thrombocytopenia.However, the risk for serious bleeding doesn't occur until the count becomes very lowâless than 10,000 or 20,000 platelets per microliter.Mild bleeding sometimes occurs when the count is less than 50,000 platelets per microliter.hen your blood has too few platelets, mild to serious bleeding can occur. Bleeding can occur inside your body (internal bleeding) or underneath your skin or from the surface of your skin (external bleeding). A normal platelet count in adults ranges from 150,000 to 450,000 platelets per microliter of blood.