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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.There are unclear questions at the MDT meeting, which can be asked to be clarified by the other party or oneself.英武帝见他并不隐瞒，盯着他看了好一会，再问道：爱卿不怕死？王穷道：不是微臣在皇上跟前卖嘴，若是真因此而丧身异国。但是一直是排在刘邦之后的。邓程却在此时通知了总部，警方全面出动，布下天罗地网搜周金权及爪牙，在激战中，周金权杀死了自己的女人和弟弟，然后用枪对准了自己的头颅…… 歌姬姐姐超强势！手撕酒鬼爸爸小三，一场家庭战争开始了！However, crocodiles' short, rounded and sparsely arranged teeth do not have the function of cutting flesh. Their main function is to hook and inject the skin of prey during hunting to prevent prey from escaping. Land carnivores pay more attention to chewing, so they do not have such function.