William Aird/X
Aug 2, 2025, 17:44
Understanding ESR: Dr. William Aird Breaks Down the Factors Behind Sedimentation Rate Changes
William Aird, Professor of Medicine at Harvard Medical School, shared a post on X:
“WHAT DETERMINES THE ESR?
↑ ESR: ↑ fibrinogen, ↑ immunoglobulins, ↓ Hct
↓ ESR: poikilocytosis, ↓ RBC deformability, ↑ Hct, ↑ plasma viscosity
Red cell stacking speeds it up. Resistance slows it down.”

Read The Blood Project here.
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