William Aird/X
May 5, 2026, 13:58
Hb vs Hct: Who’s in charge? – William Aird
William Aird, Professor of Medicine at Harvard Medical School, shared a post on X:
”Hb vs Hct: Who’s in charge?
Anemia?
Think Hb. Polycythemia?
Think Hct. At equipoise?
Dealer’s choice. (I lean Hb; call me an optimist)
Because O₂ delivery is a tradeoff: carrying capacity (Hb) vs flow (Hct).”
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