BACKGROUND: During processing and storage, red blood cells (RBCs) undergo changes and cell injury resulting in hemolysis. Mostly, the separation of whole blood in top-and-bottom quadruple bag systems with break openings takes less than 4 minutes. However, longer separation times are not uncommon. The aims were to investigate whether hemolysis is increased in RBCs with longer separation time (RBCs(>6 min)) compared to regular RBCs (RBCs(reg)), to measure hemolysis increase during storage and to study whether frequency of hemolytic donations is donor dependent. STUDY DESIGN AND METHODS: RBCs(>6 min) (n = 172) and 172 matched controls were tested for hemolysis on Days 1 and 21 RBC units from each group were stored at 4 ± 2°C and tested again after 5 weeks. Donor dependency was retrospectively investigated for 100 hemolytic RBC units. RESULTS: RBCs(>6 min) exhibited a higher mean hemolysis rate than RBCs(reg) (0.058% vs. 0.033%). Four RBC units were hemolytic (>0.8%), all RBCs(>6 min) (2.36%). During storage, hemolysis in both groups increased with 0.24%. Hemolysis frequency did not seem to be donor dependent. CONCLUSIONS: Increased separation time is a useful screening tool for potentially increased hemolysis rate in RBCs. Hemolysis rate increased during storage equally in both groups. Hemolysis frequency appears donor independent.
BACKGROUND: During processing and storage, red blood cells (RBCs) undergo changes and cell injury resulting in hemolysis. Mostly, the separation of whole blood in top-and-bottom quadruple bag systems with break openings takes less than 4 minutes. However, longer separation times are not uncommon. The aims were to investigate whether hemolysis is increased in RBCs with longer separation time (RBCs(>6 min)) compared to regular RBCs (RBCs(reg)), to measure hemolysis increase during storage and to study whether frequency of hemolytic donations is donor dependent. STUDY DESIGN AND METHODS: RBCs(>6 min) (n = 172) and 172 matched controls were tested for hemolysis on Days 1 and 21 RBC units from each group were stored at 4 ± 2°C and tested again after 5 weeks. Donor dependency was retrospectively investigated for 100 hemolytic RBC units. RESULTS: RBCs(>6 min) exhibited a higher mean hemolysis rate than RBCs(reg) (0.058% vs. 0.033%). Four RBC units were hemolytic (>0.8%), all RBCs(>6 min) (2.36%). During storage, hemolysis in both groups increased with 0.24%. Hemolysis frequency did not seem to be donor dependent. CONCLUSIONS: Increased separation time is a useful screening tool for potentially increased hemolysis rate in RBCs. Hemolysis rate increased during storage equally in both groups. Hemolysis frequency appears donor independent.
Authors: Steven B Solomon; Dong Wang; Junfeng Sun; Tamir Kanias; Jing Feng; Christine C Helms; Michael A Solomon; Meghna Alimchandani; Martha Quezado; Mark T Gladwin; Daniel B Kim-Shapiro; Harvey G Klein; Charles Natanson Journal: Blood Date: 2012-12-18 Impact factor: 22.113
Authors: Steven Kleinman; Michael P Busch; Edward L Murphy; Hua Shan; Paul Ness; Simone A Glynn Journal: Transfusion Date: 2013-11-04 Impact factor: 3.157