One unit of fresh blood rises the Hb% concentration by:: (A) 0.1 gm%, (B) 1 gm%, (C) 2gm%, (D) 2.2 gm%
Answer is B. In general for a stable, euvolemic adult patient, the transfusion of 1 unit of packed cells raises the hemoglobin concentration by 1g/dl. Ref: Fundamentals of Surgical Practice By Andrew Kingsnoh, Douglas Bowley, 3rd Edition, Page 234; Bailey and Love's Sho Practice of Surgery, 24th Edition, Page 62.