All units of PRBCs are not equal. The volumes are different. The expiry dates are different.
It's important to keep a record of the dates of infusion, the volumes infused and the dates of PRBC donation and expiration. Keep a precise record; you may be quite surprised at the volume variations and just how long the transfusions "work" for your mom, just sayin'.
Your mom's doc should have standing orders for the number of PRBC units to infuse depending on her Hgb level. For example, two units when Hgb is under 80g/L.
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Ric: Low-risk MDS (blasts <4%); 4 cycles Revlimid no positive response; PRBC transfusion dependent; so far, 392'units' over 8 3/4 years; BMB #4 (15/04/01) shows evolution to AML (blasts 20-30%
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47,XY,del(5) (q22q35),+21[24][cp24]/46,XY(1).