RBCs Life cycle

Concerning transfusion, it is known that the life cycle of a normal red blood cell is 90 days. When someone get transfused from where can he knows the ''age'' of the blood he is having. I mean one may be transfused with a blood that was produced in the doners body from 80 days, therefore it will break down in the recipent after 10 days and this will lead to inaccurancy when deciding how long it takes the thal person to maintain the HB level. Is what Iam saying is right or wrong??
Manal

We've had a discussion about this in the thread, Are All Transfusions Equal on the Thalassemia-Related Issues Board at
http://www.thalassemiapatientsandfriends.com/index.php?topic=191.0

When someone get transfused from where can he knows the ''age'' of the blood he is having.

Unfortunately, it's impossible.  The only way to do it, is if the blood bank microscopically examines it, or takes a hemoglobin sample of the unit of blood, which they would never do, because it's "too expensive" in their eyes.   

If you'd like other info on it, you can take a look at the other thread we have, that Andy has given you the link to.