title: Automated preparation of whole blood-derived platelets suspended in two different platelet additive solutions and stored for 7 days.
abstract: BACKGROUND
  The Atreus system (Terumo BCT) automates the preparation of blood components from whole blood donations. Intermediate platelet (PLT) products can be pooled manually or with the OrbiSac (Terumo BCT) and suspended in different PLT additive solutions (PASs) to obtain PLT concentrates (PCs). The aim of our study was to compare the in vitro PLT quality of PCs obtained with either the Atreus 2C+ and the OrbiSac or the Atreus 3C and suspended in PAS-II or PAS-IIIM during storage for up to 7 days.
  
  
  METHODS
  We prepared eight PCs from buffy coats obtained with Atreus 2C+, pooled with the OrbiSac, and suspended in PAS-II and eight PCs from interim PLT units obtained with the Atreus 3C and suspended either in PAS-II or in PAS-IIIM. We measured volume, PLT content, and mean PLT component and performed metabolic assays (pH, glucose, lactate, pO₂, and pCO₂) and flow cytometry analyses (GPIb, GPIIbIIIa, GPIV, CD62P, CD63, von Willebrand factor [vWF], fibrinogen, Factor V, and annexin V).
  
  
  RESULTS
  PCs prepared with the Atreus 3C showed lower volume and higher PLT concentration when compared with PCs prepared with the Atreus 2C+ and the OrbiSac (p < 0.05). Glucose consumption rate and the expression of CD62P, CD63, and vWF were lower in PCs suspended in PAS-IIIM when compared with PCs suspended in PAS-II (p < 0.05).
  
  
  CONCLUSIONS
  PCs prepared with the Atreus 3C and suspended in PAS-IIIM preserve satisfactorily the in vitro PLT quality during 7-day storage. PLT activation during a 7-day storage period was lower when the storage solution was PAS-IIIM in comparison with PAS-II.
authors.affiliation: Department of Hemotherapy and Hemostasis, CDB, IDIBAPS, Hospital Clínic, University de Barcelona; and the Banc de Sang i Teixits, Barcelona, Spain.
authors.forename: Joan
authors.initials: J
authors.lastname: Cid
authors.forename: Laura
authors.initials: L
authors.lastname: Magnano
authors.forename: Patricia
authors.initials: P
authors.lastname: Molina
authors.forename: Maribel
authors.initials: M
authors.lastname: Diaz-Ricart
authors.forename: Nuria
authors.initials: N
authors.lastname: Martínez
authors.forename: Rosa M
authors.initials: RM
authors.lastname: Maymó
authors.forename: Lluís
authors.initials: L
authors.lastname: Puig
authors.forename: Miguel
authors.initials: M
authors.lastname: Lozano
authors.forename: Ginés
authors.initials: G
authors.lastname: Escolar
authors.forename: Ana M
authors.initials: AM
authors.lastname: Galán
mesh_terms: D000094902:Blood Banking / Q000379:methods*; D001792:Blood Platelets / Q000166:cytology* / Q000378:metabolism; D001793:Blood Preservation / Q000295:instrumentation* / Q000379:methods*; D005434:Flow Cytometry; D006801:Humans; D015539:Platelet Activation; D010976:Platelet Count; D017713:Platelet Transfusion; D012996:Solutions / Q000494:pharmacology*; D013997:Time Factors
chemical_list: D012996:Solutions