Homework Answers
1. Each unit of packed red blood cells (PRBCs) is expected to raise circulating hemoglobin (HGB) by approximately 1 g/dL. So, the expected posttransfusion hemoglobin will be 9.0 gm/dL.
2. Various reasons for a failure of the patients hemoglobin to increase after transfusion are :-
* on-going bleeding
* the time from the transfusion to the next HB count
* the quantity of blood in each bag
* how long the bagged blood had been stored prior to use
* transfusion reactions
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