Anemia oxygen-carrying deficit

Reduced effective red-cell hemoglobin lowers blood's oxygen-carrying capacity. This is a qualitative principle rather than a numerical diagnostic cutoff.

Iron deficiency limits heme synthesis

Iron is required for heme; insufficient available iron can limit heme and hemoglobin synthesis.

Microcytic Macrocytic

Principal distinction · Smaller red-cell volume than the relevant comparison range · Larger red-cell volume than the relevant comparison range

What does macrocytic describe in erythrocyte morphology?

Macrocytic describes red cells larger than the comparison range used for their volume. It is a morphological category rather than a diagnosis of a particular cause.

Blood-loss red-cell deficit

Loss of circulating red cells can reduce red-cell mass and effective oxygen-carrying capacity. The timing of a measured concentration change also depends on plasma-volume changes.

Haematology Foundations — Flashcards — Medische flashcarddecks

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