Abstract:
:With an interval of eight weeks between collections, blood was drawn twice from 120 blood donors. At one of the donations, 0.25 ml of synthetic vasopressin, (DDAVP, 1300 micrograms/ml), was administered intranasally 60 minutes prior to collection of the blood. No drug was given at the other donation. The yield of factor VIII clotting activity (VIII:C) and factor VIII antigen (VIIIR:Ag) was compared in blood drawn from the treated and untreated donors. To prevent degradation of VIII:C by fibrinolysis, tranexamic acid was added to the plasma from treated donors immediately after separation from the red blood cells. Plasma from treated donors and the derived Cohn fraction I-O contained approximately twice as much VIII:C as plasma and fraction I-O from untreated control donors. The concentration of VIIIR: Ag was also increased in fraction I-O made from plasma from treated donors, however to a lesser degree. The in vivo properties of factor VIII concentrates made from each group of donors were studied. Half-life in plasma and recovery of VIII:C were identical. Thus, intranasal synthetic vasopressin may be used to increase the yield of VIII:C in production of factor VIII concentrates.
journal_name
Transfusionjournal_title
Transfusionauthors
Mikaelsson M,Nilsson IM,Vilhardt H,Wiechel Bdoi
10.1046/j.1537-2995.1982.22382224947.xsubject
Has Abstractpub_date
1982-05-01 00:00:00pages
229-33issue
3eissn
0041-1132issn
1537-2995journal_volume
22pub_type
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