[Mechanical plasmapheresis by means of the Haemonetics-ultralite- plasma collection system: 2. Generation of platelet-rich plasma].

70 plateletpheresis were performed in a clinical study to evaluate the quality of platelet-rich-plasma prepared by the new developed Haemonetics-Ultralite-Plasmacollection system. The procedure took in average 54 minutes, resulting in a platelet content of 1.6 X 10(11) platelets. Platelets function (hypotonic stress response, ADP- and collagen-induced aggregation) was well maintained. The after differential centrifugation prepared platelet concentrate may be stored in the collection bag for 1 day at room temperature with acceptable functional recovery.