Autologous Tansfusion REquirements in Bone MArrow Harvest: The ATREMA Study

Despite perioperative autologous donation (PAD) is widely used in healthy bone marrow (BM) donors to restrain the hemoglobin decrease after BM harvest, this practice is not supported by strong clinical evidences and has been abandoned by some transplant teams. The critical revision of data relative to 102 BM collection procedures performed at our center between 2014 and 2018 failed to demonstrate an advantage of 1 over 2 PAD. Conversely, clearly emerged that PAD reduce the hemoglobin levels at BM harvest. Basically, PAD practice consists in the transfer of RBCs from the subject into a plastic bag and back to the subject at BM harvesting. Indeed, the evidence of clinical benefits of PAD in BM donors are still elusive. For this reason, current procedures on unrelated donors recommend iron and vitamin supplementation before the BM harvest, but let the decision to perform or not PAD at collection centers. Detailed data on the safety and feasibility of BM harvest procedures in absence of PAD have been rarely reported. The investigators collect data on BM harvest in healthy donors who don't have PAD collected. The investigators expect that no allogeneic transfusions are required and that Hb levels after collection are similar to those recorded in the historical cohort gathered at the same center receiving 1 or 2 PAD.