Autologous blood donation before elective surgery has been widely endorsed as good transfusion practice. Although only 6% of patients undergoing elective orthopedic surgery are unable to donate 3 autologous units, 40% cannot donate 4 units because they become anemic. According to the results of our study this must be due to different problems of bone marrow dynamics, which cannot be overcome by unselected use of human recombinant erythropoietin.
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