Flowchart of algorithm for identifying hemolysis. Abbreviations: MPV, mean platelet volume; RBC, red blood cell; mHb, measured hemoglobin; cHb, calculated hemoglobin (CHCM×RBC×MCV/1,000); MCV, mean corpuscular volume; MCHC, mean corpuscular hemoglobin concentration; CHCM, corpuscular hemoglobin concentration mean; RDW, red cell distribution width; HDW, hemoglobin distribution width; PMN, percent of polymorphonuclear.