Collection and preservation of human placental blood

High-risk premature infants require red cell transfusions for anemia. Placental blood for autologous transfusions can be collected sterilely into citrate-phosphate-dextrose and stored at 4 degrees C. During storage for 8 days, the placental red cell content of adenosine triphosphate remained normal. The 2,3,-diphosphoglycerate concentration of cells stored 8 days declined sharply; however, the P50 value of the oxyhemoglobin dissociation curve declined to 24.4 +/- 2.40 torr. During storage, placental blood underwent an exchange of extracellular Na+ and K+, but no change in glutathione content. Hemolysis was less than 1 percent. Bacteriologic and fungal cultures remained sterile. These in vitro studies suggest that human placental blood can be collected safely and preserved effectively for autologous red cell transfusion therapy.