The alive additive of Defibrase is a serine protease which is accessible in a authentic individual admixture antiseptic from the snake acidity of Gloydius ussuriensi & Deinagkistrodon acutus. in China. The ability is agnate to that of Tobishi’s (Japan) Batroxobin which is from the snake acidity of Bothrops moojeni in Brazil. Defibrase from Gloydius ussuriensi & Deinagkistrodon acutus has a atomic weight of about 36KD, it cleaves Arg-Gly bonds in fibrinogen alpha chains, does not carve fibrinogen beta chains. Defibrase has the acreage of abandoning thrombus, preventing occlusion and convalescent microcirculation.