The Full form of MPV is Mean Platelet Volume. The blood in human body contains several types of cells, including red blood cells, white blood cells, and platelets. Doctors order blood tests because they want to examine these cells for signs of health problems. One of the most common tests that doctors ask for is a CBC (complete blood count). One of the tests run during a complete blood count is Mean Platelet Volume (MPV) test. An MPV test measures the average size of the platelets. It’s closely related to a platelet count test, which measures the number of platelets in the blood. Platelets are small blood cells in human body that play an essential role in blood clotting. For example, when there is a cut in the body, platelets stick together to stop the bleeding. In some cases, platelet abnormalities can be a sign of a bleeding disorder or other health problem. Having a low or high MPV doesn’t mean anything on its own. It should be interpreted within the context of other CBC results, such as platelet count. In most cases, the doctor will simply use MPV test results to decide whether or not to do additional testing, such as a bone marrow biopsy.