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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.先帝驾崩，太子巡游在外。皇叔篡位并自封厉帝执掌朝政。身为当朝太子后母却又是与太子自小青梅竹马的婉后迫于无奈，委身厉帝，并希冀以此保太子周全。小葱点点头，再没有接话。进京参加大比，怕是要等来年才能重新再看此剧了。第3季将探索弗兰克林的音乐天赋,无与伦比的职业生涯以及她对世界各地音乐和文化产生的不可估量和持久的深远影响。她是一位福音神童和直言不讳的民权捍卫者,被广泛认为是过去50年间最伟大的歌手,而其获得的荣誉更是无数。皇家的力量果然不同凡响，好几处同时下手查证，不知从哪翻出一些销声匿迹的老人，事情便水落石出了。