title: Collection of WBC-reduced single-donor PLT concentrates with a new blood cell separator: results of a multicenter study.
abstract: BACKGROUND
  A new cell separator (COM.TEC, Fresenius) was recently developed aimed at efficient collection of WBC-reduced single-donor PLT concentrates (SDPs).
  
  
  METHODS
  Five German centers collected 554 WBC-reduced SDPs with help of the COM.TEC cell separator. Two multicenter cell counting studies were performed at the beginning and at the end of the study to document uniform counting results among the participating centers.
  
  
  RESULTS
  A total of 441 (79.6%) PLT collections were included in the study according to the protocol. A total of 342 single-dose and 99 double-dose SDPs were collected. For single-dose SDPs, an average blood volume of 2826 +/- 409 mL was processed in a donation time of 55 +/- 11 minutes. Mean PLT yield of these products was 3.11 x 1011+/- 0.40 x 1011 and the WBC contamination was 0.11 x 106+/- 0.20 x 106. For double-dose SDPs (PLT count, 5.29 +/- 0.93 x 1011), 3943 +/- 639 mL was processed. The average difference between the target and the collected PLT concentration was -2.8 +/- 12.0 percent for single-dose SDPs and -1.8 +/- 9.5 for double-dose SDPs, respectively. The collection efficiency was 53.7 +/- 5.8 percent for single-dose SDPs and 58.2 +/- 6.2 percent for double-dose SDPs. If all results of each sample from the counting study were set to unity (to the mean over all centers), most PLT determinations were very similar to the mean, for example, near or 1 if set to unity.
  
  
  CONCLUSIONS
  The COM.TEC machine makes it possible to obtain WBC-reduced SDPs that comply with current standards.
authors.affiliation: Institute for Transfusion Medicine, University Clinics, Essen, Germany. rainer.moog@uni-essen.de
authors.forename: Rainer
authors.initials: R
authors.lastname: Moog
authors.forename: Thomas
authors.initials: T
authors.lastname: Zeiler
authors.forename: Hans-Gert
authors.initials: HG
authors.lastname: Heuft
authors.forename: Bernhard
authors.initials: B
authors.lastname: Stephan
authors.forename: Eike G
authors.initials: EG
authors.lastname: Fischer
authors.forename: Volker
authors.initials: V
authors.lastname: Kretschmer
authors.forename: Regina
authors.initials: R
authors.lastname: Rödel-Spieker
authors.forename: Erwin
authors.initials: E
authors.lastname: Strasser
authors.forename: Jürgen
authors.initials: J
authors.lastname: Zingsem
authors.forename: Roger
authors.initials: R
authors.lastname: Moog
authors.forename: Berckard
authors.initials: B
authors.lastname: Stephan
authors.forename: Stephan
authors.initials: S
authors.lastname: Strasser
mesh_terms: D001772:Blood Cell Count; D001773:Blood Cells; D001782:Blood Donors; D001810:Blood Volume; D002469:Cell Separation / Q000295:instrumentation* / Q000592:standards; D004867:Equipment Design; D005260:Female; D006801:Humans; D007937:Leukapheresis; D008297:Male; D017713:Platelet Transfusion; D012449:Safety; D013997:Time Factors