Background
Trials of transfusions of platelets (PLTs) treated with amotosalen‐based pathogen reduction (PR) showed lower corrected count increments (CCIs) compared to conventional PLT components (PCs). However, PR‐PLTs and conventional PCs often differed in various factors besides PR. We compared transfusion efficacy of single‐donor apheresis PCs treated with PR or gamma irradiation.
Study Design and Methods
Hematologic patients were assigned to receive PR‐PLTs or gamma‐irradiated conventional PCs, both prepared in PLT additive solution (PAS). One‐hour CCI (primary endpoint), 24‐hour CCI, time to next PLT transfusion, and transfusion requirement of red blood cells and plasma were analyzed.
Results
Forty‐four patients assigned to PR‐PLTs received 220 PR‐PLTs and 136 conventional PCs; 72 controls received 517 conventional PCs. No differences between patient groups were observed for mean (±standard deviation [SD]) 1‐hour CCI (11.4 [±4.9] for PR‐PLT vs. 11.0 [±4.9] for controls), mean (±SD) 24‐hour CCI (6.1 [±4.4] for PR‐PLTs vs. 6.2 [±4.8] for controls), and for the other evaluated outcomes. No differences between PC types were observed for mean (±SD) 1‐hour CCI (10.6 [±6.7] for PR‐PLTs vs. 9.9 [±6.2] for conventional PCs) and mean 24 hour‐CCI (3.3 [±3.9] for PR‐PLTs vs. 4.2 [±5] for conventional PCs). Thirty‐five percent of PR‐PLTs and 38% of conventional PCs (p = 0.63) were associated with 1‐hour CCIs of less than 7.5. Inadequate 24‐hour CCIs were observed for 72% of PR‐PLTs and 64% of conventional PCs (p = 0.002).
Conclusions
Transfusion efficacy of single‐donor apheresis PCs in PAS treated with amotosalen PR versus gamma irradiation is comparable.