Relative Inability of Heparin to Prolong Clotting Time of Oxalated and Resin-Treated Blood and Plasma. ∗ †

Abstract

Summary

Plasma decalcified with sodium oxalate or passage through cation-exchange resins is relatively resistant to the anticoagulant effect of heparin on recalcification. Native plasma, and sodium citrate or Seques-trene-Na² tested plasma react normally to heparin. The latter plasmas only should be used when testing the anticoagulant effect of heparin in vitro.