what is the pyruvate lab draw for
Pyruvate kinase blood test. The pyruvate kinase test measures the level of the enzyme pyruvate kinase in the blood. Pyruvate kinase is an enzyme found in red blood cells. It helps change sugar in the blood (glucose) to energy when oxygen levels are low. A blood sample is needed. In the laboratory, white blood cells are removed from the blood sample because they can alter test results.