Langer R, Linhardt R J, Hoffberg S, Larsen A K, Cooney C L, Tapper D, Klein M
Science. 1982 Jul 16;217(4556):261-3. doi: 10.1126/science.7089564.
The need to fully heparinize patients undergoing extracorporeal therapy often leads to hemorrhagic complications. To enable heparinization of only the extracorporeal circuit, a blood filter containing immobilized heparinase was developed. This filter degraded 99 percent of heparin's anticoagulant activity within minutes in both canine and human blood.