title: Stability of hemostatic proteins in canine fresh-frozen plasma thawed with a modified commercial microwave warmer or warm water bath.
abstract: OBJECTIVE
  To compare stability of hemostatic proteins in canine fresh-frozen plasma (FFP) thawed with a modified commercial microwave warmer (MCM) or warm water bath (37°C; WWB) or at room temperature (22°C).
  
  
  METHODS
  Fresh-frozen plasma obtained from 8 canine donors of a commercial blood bank.
  
  
  METHODS
  A commercial microwave warmer was modified with a thermocouple to measure surface temperature of bags containing plasma. The MCM and a WWB were each used to concurrently thaw a 60-mL bag of plasma obtained from the same donor. Two 3-mL control aliquots of FFP from each donor were thawed to room temperature without use of a heating device. Concentrations of hemostatic proteins, albumin, and D-dimers; prothrombin time (PT); and activated partial thromboplastin time (aPTT) were determined for all samples.
  
  
  RESULTS
  Significant decreases in concentrations of factors II, IX, X, XI, fibrinogen, von Willebrand factor, antithrombin, protein C, and albumin and significant increases in PT and aPTT were detected for plasma thawed with the MCM, compared with results for samples thawed with the WWB. Concentrations of factors VII, VIII, and XII were not significantly different between plasma thawed with the MCM and WWB. Concentrations of D-dimers were above the reference range for all thawed samples regardless of thawing method. No significant differences in factor concentrations were detected between control and WWB-thawed samples.
  
  
  CONCLUSIONS
  Significant differences in hemostatic protein concentrations and coagulation times were detected for plasma thawed with an MCM but not between control and WWB-thawed samples. Clinical importance of these changes should be investigated.
authors.affiliation: Department of Small Animal Clinical Sciences, College of Veterinary Medicine, Texas A&M University, College Station, TX 77843.
authors.forename: Medora B
authors.initials: MB
authors.lastname: Pashmakova
authors.forename: James W
authors.initials: JW
authors.lastname: Barr
authors.forename: Micah A
authors.initials: MA
authors.lastname: Bishop
mesh_terms: D000818:Animals; D001780:Blood Coagulation Tests / Q000662:veterinary; D001798:Blood Proteins / Q000737:chemistry*; D004285:Dogs / Q000097:blood*; D006361:Heating; D006490:Hemostatics / Q000032:analysis*; D006358:Hot Temperature; D008872:Microwaves; D010949:Plasma / Q000737:chemistry*; D055550:Protein Stability; D014867:Water / Q000737:chemistry*
chemical_list: D001798:Blood Proteins; D006490:Hemostatics; D014867:Water