Erythropoiesis - blood Erythropoiesis (cont.) * The...

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blood Erythropoiesis (cont.) * The reticulocyte count is usually given as the percentage of red blood cells that are reticulocytes (the number of reticulocytes divided by the total number of red blood cells, multiplied by 100). * Normal:0.5%–2.0% * Newborns have a normal reticulocyte count of 2.5% to 6.5%. This value drops within 2 weeks to 0.5% to 2.0%. Erythropoiesis (cont.) High values * A high reticulocyte count may indicate * increased production of red blood cells by the bone marrow, which can be caused by bleeding, * a move to high elevation, * or certain types of anemia resulting in increased destruction of red blood cells (hemolysis). * The reticulocyte count usually rises after successful treatment for pernicious anemia, iron-deficiency anemia, or folic acid deficiency anemia. Erythropoiesis (cont.) Low values * A low reticulocyte count may indicate * decreased production of red blood cells by the bone marrow, which can be caused by aplastic anemia or other types of anemia, such as iron-deficiency anemia.
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Erythropoiesis - blood Erythropoiesis (cont.) * The...

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