The patient has a hemoglobin of 8.5 g/dL and hematocrit of 27%. The nurse administers 2 units of packed red blood cells to the patient and repeats the labwork a few hours later. The new hemoglobin and hematocrit would be expected to be:
a. hemoglobin 7.5 g/dL and hematocrit 25%.
b. hemoglobin 9.5 g/dL and hematocrit 29%.
c. hemoglobin 10.5 g/dL and hematocrit 32%.
d. hemoglobin 12.5 g/dL and hematocrit 36%.
C
One unit of packed RBCs can be expected to increase the Hgb value by 1 g/dL and the Hct value by 2% to 3%, but this effect is influenced by the patient's intravascular volume status and whether the patient is actively bleeding.
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