title: The quality of plasma collected by automated apheresis and of recovered plasma from leukodepleted whole blood.
abstract: BACKGROUND
  There exists a current lack of information about the composition of the different types of plasma. No direct comparisons between apheresis plasma (AP) and recovered plasma (RP) derived from in-line-filtered whole blood (WB) have been published to date.
  
  
  METHODS
  Sixty AP units, 100 RP units from in-line-filtered WB held for 3 hours at 20 degrees C between donation and freezing, and an additional 100 RP units held for 15 hours at 20 degrees C before freezing were analyzed for coagulation factors and inhibitors, total protein, immunoglobulin G (IgG), and hemostasis and proteolysis activation markers. The influence of twice freezing and thawing on clotting factors V, VIII, and XI was also examined.
  
  
  RESULTS
  AP contains substantially greater activities of factor (F) V, FVIII, F IX, and FXI than RP frozen within 3 hours after WB donation. Prolonged holding of RP at 20 degrees C for more than 15 hours caused an additional reduction in FVIII, FXI, and protein S activities. Significantly greater levels of prothrombin fragments 1 and 2, platelet factor 4, and neutrophil elastase were found in RP compared with AP. IgG was lower in AP compared with RP. Twice freezing and thawing caused a marked drop in FV, FVIII, and FXI activity.
  
  
  CONCLUSIONS
  Higher FVIII and F IX potencies in AP compared with RP can be expected to result in greater yields when used for purification of these clotting factors. AP is presumably more efficient than RP for treating coagulopathies. RP, however, may contain higher IgG levels than AP.
authors.affiliation: Transfusionszentrale, Johannes-Gutenberg University, Mainz, Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Runkel
authors.forename: Hannelore
authors.initials: H
authors.lastname: Haubelt
authors.forename: Walter
authors.initials: W
authors.lastname: Hitzler
authors.forename: Peter
authors.initials: P
authors.lastname: Hellstern
mesh_terms: D000328:Adult; D000925:Anticoagulants; D001781:Blood Component Removal / Q000379:methods / Q000592:standards*; D019343:Citric Acid; D005164:Factor IX / Q000378:metabolism; D005165:Factor V / Q000378:metabolism; D005169:Factor VIII / Q000378:metabolism; D005172:Factor XI / Q000378:metabolism; D005260:Female; D005340:Fibrinogen / Q000378:metabolism; D006487:Hemostasis; D006801:Humans; D007958:Leukocyte Count; D019272:Leukocyte Elastase / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D010949:Plasma
chemical_list: D000925:Anticoagulants; D019343:Citric Acid; D005165:Factor V; D005169:Factor VIII; D005164:Factor IX; D005340:Fibrinogen; D005172:Factor XI; D019272:Leukocyte Elastase