In Vitro Comparison of CPD Whole Blood with Conventional Blood Components



      Resuscitation of severely injured trauma patients is commonly performed using red blood cells in additive solution supplemented with plasma and platelet concentrates. There is an increasing interest in the use of low anti-A titer Group O whole blood (LTOWB) in the early management of the resuscitation. It is unclear whether clinical outcome is improved using this approach.


      Expired units of CPD-LTOWB were studied on Day 22 and expired units of thawed plasma on Day 6 and Day 7. LTOWB was assessed for hemoglobin content, clotting factor levels and platelet numbers and function using thromboelastography ( TEG) and impedance aggregation. Assays of fibrinogen and FV, FVIII, FVII and FX were performed on the expired plasma. The LTOWB hemoglobin was compared to red cells in additive solution (AS-RBCs) and the clotting factor levels to those of expired thawed plasma. Platelet function was compared to fresh whole blood samples from healthy subjects.


      LTOWB contained slightly more hemoglobin than the AS-RBCs (Medians, 66 v 59 G), and the plasma content of fibrinogen was similar. Other clotting factors were reduced by approximately 15% except for FVIII which was 30% less. Both TEG and impedance aggregometry showed evidence of residual platelet function despite the prolonged period of refrigerator storage.


      LTOWB contains higher hemoglobin and adequate clotting factors, and residual platelet function is demonstrated indicating that this product would be expected to be at least equivalent to a single unit of each of the conventional components commonly used in trauma resuscitation.


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