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Thromboembolic diseases are currently one of the causes that endanger human health and lead to the highest mortality rate, such as myocardial infarction, cerebral thrombosis, deep vein thrombosis, cerebral embolism, pulmonary embolism, etc. In addition, thrombosis is an important pathological process involved in the pathogenesis of many diseases. 1. Anticoagulant therapy (1) Heparin: Heparin is a commonly used anticoagulant and is a highly sulfated glucosaminoglycan. Heparin is widely found in mammalian tissues, and mast cells are the main producing sites. The main sources of medicinal heparin are bovine lung and pig intestinal mucosa. Heparin used clinically is called unfraction heparin (UFH) because it is a mixture of components with different relative molecular weights. The relative molecular weight is between 33,000 and 30,000, which is also called standard heparin (SH). The drug name is heparin sodium. (2) Low molecular weight heparin: crude heparin is cracked into some fraction with relative molecular mass of 1000 ~ 12000 by chemical or enzymatic hydrolysis methods, and then purified. There are at least 10 kinds of low molecular weight heparin prepared by different manufacturers and different methods.周夫子见板栗有些尴尬，微微冲他一笑，道：只管说来。洛蒂是个无可救药的浪漫主义者，然而当自私的妹妹突然宣布订婚，她梦想中的完美婚礼计划付诸东流，人生也天翻地覆。说着一手，一名亲兵压着猥琐的的男子进来。As for the few times mentioned earlier when the bloggers passed on the golden body,Ma Zhu, thank you, landlord在一个充斥着贪腐和饥荒的王国中，关于国王死亡的神秘传闻沸沸扬扬，同时一场奇怪的瘟疫传播开来，感染者可获得不死之身并嗜食人肉。成为阴谋牺牲品的皇太子开始踏上揭露邪恶阴谋，拯救子民的征程。