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[Comparison of platelet concentrates obtained using blood cell separators with continuous flow: CS-3000 and Cobe-Spectra].

During a platelet apheresis procedure on CS-3000 the platelet concentrate (Pc) is centrifugated for about 1.5 h. In the Cobe system Pc is gradually collected in a container located outside the machine. Influence of both techniques on platelet viability and function was examined in vitro. MPV, hypotonic stress response (HSR), aggregation using ADP, activity and percent leakage of lactic dehydrogenase (LDH) were similar in both groups. ATP contents in platelets (Plts) obtained on CS-3000 reached 5.18 +/- 0.75 mumol/10(11) Plts and was significantly lower than in Plts collected on Cobe-Spectra: 7.26 +/- 1.00 mumol/10(11) Plts. The functions of Plts obtained on both blood cell separators, immediately after collection, appeared to be correct. ATP level reduction in Plts from CS-3000 suggests that prolonged centrifugation leads to Plts activation which can affect cells during storage.