title: [In-line leukocyte depletion ov thrombocytapheresis concentrates with the Fresenius-AS-104 cell separator].
abstract: This study reports on in-line filtration of 72 platelet concentrates (PC) collected by the Fresenius AS 104 cell separator, using the new C4F sets with integrated leukocyte filters (Biofil P plus).
  
  
  METHODS
  72 volunteer donors, automatic counts of platelets, microscopical counting of residual leukocytes with the Nageotte chamber, GMP-140 by flow cytometrie, beta-thromboglobulin release, platelet aggregation (ADP, collagen).
  
  
  CONCLUSIONS
  Filtration reduced leukocytes by 98.5%. Residual leukocyte contamination remained clearly below 5 x 10(6) (mean 0.5 +/- 0.6 x 10(6), maximum 2.8 x 10(6). Platelet loss by filtration was found to be between 27.4 and 0.7% (median 8.5%). Filtration caused a significant decrease of platelet aggregability (p < 0.005), but no significant increase of beta-thromboglobulin release and only a slight decrease of GMP-140 expression. From these data can be concluded that in-line filtration was highly efficient with acceptable platelet retention. No significant platelet activation could be observed in the PC. The decrease of platelet aggregability have been due to the reduction of activated platelets which are believed to show reduced in vivo survival.
authors.affiliation: Abteilung für Transfusionsmedizin und Gerinnungsphysiologie, Klinikum der Phillips-Universität Marburg, Deutschland.
authors.forename: T
authors.initials: T
authors.lastname: Zeiler
authors.forename: V
authors.initials: V
authors.lastname: Kretschmer
mesh_terms: D002469:Cell Separation / Q000295:instrumentation*; D004867:Equipment Design; D005374:Filtration / Q000295:instrumentation*; D006801:Humans; D007958:Leukocyte Count; D015539:Platelet Activation / Q000502:physiology; D010974:Platelet Aggregation / Q000502:physiology; D010976:Platelet Count; D017713:Platelet Transfusion / Q000295:instrumentation*; D010983:Plateletpheresis / Q000295:instrumentation*