TY - CHAP M1 - Book, Section TI - Methods in Clinical Hematology A1 - Laposata, Michael A1 - McCaffrey, Peter PY - 2022 T2 - Clinical Laboratory Methods: Atlas of Commonly Performed Tests AB - In most automated instruments that count cells in the blood, the red blood cells, the white blood cells, and the platelets are counted by an electrical impedance method. In addition, hemoglobin is measured directly from the whole blood specimen after lysis of the red blood cells. There are many other parameters in an automated blood cell count, which are calculated, based upon the data obtained from the direct cell counts and the hemoglobin value. Calculated parameters include the hematocrit, red blood cell count, the mean corpuscular volume (MCV), the mean corpuscular hemoglobin (MCH), the mean corpuscular hemoglobin concentration (MCHC) of red blood cells, and the mean platelet volume (MPV). The white blood cell differential count is obtained after lysis of erythrocytes, using flow cytometric technology to identify size, shape, and granularity of the cells which permits identification of the individual white blood cell populations. SN - PB - McGraw Hill, LLC CY - New York, NY Y2 - 2024/04/20 UR - accessmedicine.mhmedical.com/content.aspx?aid=1187001183 ER -