Anemia
This article discusses the medical condition. For the
fern genus, see
Anemia (fern)Anemia (
AmE) or anæmia/anaemia (
BrE), from the
Greek (an-haîma) meaning "without blood", is a deficiency of
red blood cells (RBCs) and/or
hemoglobin. This results in a reduced ability of blood to transfer
oxygen to the
tissues, causing tissue
hypoxia. Since all human cells depend on
oxygen for survival, varying degrees of anemia can have a wide range of clinical consequences.
Hemoglobin (the oxygen-carrying
protein in the red blood cells) has to be present to ensure adequate
oxygenation of all body tissues and organs. The three main classes of anemia include excessive blood loss (acutely such as a
hemorrhage or chronically through low-volume loss), excessive blood cell destruction (
hemolysis) or deficient red blood cell production (ineffective
hematopoiesis). In menstruating women, dietary iron deficiency is a common cause of deficient red blood cell production.
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Anémie
Anämie
Bei einer Anämie ist die
Sauerstoff-Transportkapazität des
Blutes vermindert. Infolgedessen kann es in ausgeprägten Fällen zu einer Minderversorgung des Körpers mit Sauerstoff (
Hypoxie) kommen.Die Anämie ist in der Medizin definiert als:eine Verminderung der Konzentration des roten Blutfarbstoffs (
Hämoglobin) und/odereine Verminderung des
Hämatokrits (prozentualer Anteil der zellulären Elemente am Blutvolumen) und/odereine Verminderung der Anzahl der roten Blutkörperchen (
Erythrozyten) unter die der Altersnorm entsprechenden Menge.
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Anemia
L'anemia (dal
greco senza sangue) è definita dalla caduta del tasso di
emoglobina (Hb) nel sangue. (ICD10 D64.9) Per l'uomo si definisce anemia una situazione di Hb <13 g/dl, per la donna Hb <12 g/dl.Nella definizione si possono usare anche altri due parametri, quali l'
ematocrito (M Hc<40%; F Hc<37%) o il numero di
globuli rossi.Hb e Hc sono correlati e determinanti per la diagnosi di anemia, mentre poco sensibile è il numero degli eritrociti.
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