Summary
Prothrombin complex concentrates (PCCs) are widely administered for emergency oral
anticoagulation reversal and for coagulation defects in liver disease. Pharmacokinetic
data may help to optimize treatment. The objective of this study was to characterize
the pharmacokinetics of a PCC (Beriplex P/N) containing coagulation factors II (FII),VII
(FVII), IX (FIX) and X (FX) and anticoagulant proteins C and S. Fifteen healthy volunteers
received a single rapid 50 IU/kg infusion of PCC and underwent frequent blood sampling
until 144 hours (h) after infusion. Coagulation factors and anticoagulant protein
pharmacokinetic parameters were estimated by non-linear regression. The mean infusion
rate of PCC was 7.9 ml/min, equivalent to 196.4 IU/min. By the earliest post-infusion
sampling point at 5 minutes (min), plasma FIX concentration increased by a median
of 73%. Median increases in FII, FVII and FX at 5 min were 122%, 62% and 158%, respectively.
Proteins C and S also increased rapidly. The median terminal half-life of FIX was
16.7 h, FII 59.7 h, FVII 4.2 h and FX 30.7 h. The median in-vivo recovery of FIX was
1.57 %/IU/kg and that of the other three coagulation factors > 2 %/IU/kg. Plasma concentration
of thrombogenicity marker D-dimer did not increase, and there was no clinical evidence
of thrombosis.Through up to 12 weeks follow-up there were no laboratory findings indicating
PCC-related viral exposure. Rapid PCC infusion produced prompt sustained increases
in coagulation factors and anticoagulant proteins with no clinical evidence of thrombosis
or viral transmission.
Keywords
Prothrombin complex concentrates - pharmacokinetics - safety - blood coagulation factors
- anticoagulation reversal