The biochemical effects of CPDA-2-drawn red blood cells of delayed refrigeration prior to component preparation.

The effects of an 8-hour hold at 22 degrees C prior to component preparation were evaluated in a split-bag study using nine units of blood preserved in citrate-phosphate-dextrose-adenine (CPDA-2). Each unit was divided in half, platelet-rich plasma removed at 0 or 8 hours, respectively, and the half units of red blood cells stored at 4 degrees C for 42 days. The only red blood cell metabolic differences seen in the bags held 8 hours (compared to those not held) were a 21 percent rise in adenosine triphosphate, which was not significant after 14 days of storage, and a 33 percent loss of 2,3-diphosphoglycerate which resulted in a loss curve similar to that seen with acid-citrate-dextrose blood. The logistic advantages seem to warrant an 8-hour holding period for red blood cells drawn in CPDA-2.