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General Characteristics. Anemia defined as reduction in Hct (volume of RBCs) or Hb concentrationEtiology: either decreased RBC production or increased RBC destruction/lossWhen RBC concentration decreases, compensatory mechanisms maintain O2 delivery to tissuesIncreased cardiac outputIncreased oxygen extraction ratioRight shift of oxyhemoglobin curve (increased 2,3-DPG)Expansion of plasma volume.
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