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Recycled blood is better than donated blood for transfusions, Hopkins study finds
Washington Post

We recycle a lot of things — paper, plastic, metal, blood.

Yes, blood. During some surgeries, operating room personnel try to capture as much blood as possible and return the red blood cells to your system, instead of, or in addition to, donated blood from a blood bank. They find that patients have better outcomes when transfused with their own blood. A Johns Hopkins University study, published in the June issue of the journal Anesthesia and Analgesia, explains one reason for that.