Abstract:
BACKGROUND:Factor VIII (FVIII) levels are used as a quality marker of fresh-frozen plasma (FFP); however, other clotting factors are not routinely measured. METHODS:We assessed additional haemostatic parameters and the dynamics of coagulation using Thrombelastography (TEG) and a thrombin generation test (TGT). FFP was prepared on the day of donation (Day 0) or after overnight hold at 4 degrees C (Day 1). RESULTS:Factor VIII in Day 1 FFP was 18% lower than in Day 0. TEG parameters in Day 1 FFP were consistent with increased coagulability and did not correlate with altered levels of clotting factors, but were consistent with the increased levels of microparticles seen in the Day 1 samples. TGT studies exhibited increased lag time, time to peak and reduced peak thrombin generation, but no change in endogenous thrombin potential (ETP) on Day 1. There was a weak association between FVIII level and both ETP and peak thrombin (ETP r(s)> or = 0.22, P< or = 0.003; peak thrombin r(s)> or = 0.48, P< or = 0.0001), which was influenced by ABO group, with the lowest levels in group O. CONCLUSION:We conclude that levels of FVIII do not predict the haemostatic potential of FFP and that there may be a role for alternative technologies in monitoring the quality of FFP.
journal_name
Vox Sangjournal_title
Vox sanguinisauthors
Lawrie AS,Cardigan RA,Williamson LM,Machin SJ,Mackie IJdoi
10.1111/j.1423-0410.2008.01037.xsubject
Has Abstractpub_date
2008-05-01 00:00:00pages
306-14issue
4eissn
0042-9007issn
1423-0410pii
VOX1037journal_volume
94pub_type
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