What is a CBC?
CBC is short for Complete Blood Count, and it remains to be one of the most common tests ordered by physicians worldwide. A venous blood sample is withdrawn into a sterile syringe or container with an added anticoagulant. Then, the number of cells is counted either manually or using a special machine called an analyzer. Next, the hematologist or the pathologist will look at your blood film through a microscope to detect any abnormal cells. Findings are then recorded, and normal values are placed to help the treating physician assess the abnormalities. The main elements of a CBC sheet include:
This is a measurement of the amount of the protein responsible for oxygen-carrying functions through red blood cells in the blood. A decreased hemoglobin is termed anemia, while an increased level is called polycythemia.
Hematocrit is the ratio of the volume of red blood corpuscles to that of the whole blood. It gives a general look at how many cells the person has; it is low in anemia cases and high in polycythemia.
They represent the number of red blood corpuscles per cubic milliliters. It is of less clinical significance than the first two but is used to confirm the findings.
Platelets are not cells by the known definition, but cellular fragments. They are formed of other big cells in the bone marrow called megakaryocytes.