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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.他从板栗那回去后，果然将此事告诉了郑氏。Don't talk about love, love either looks at face + temperament, or shares weal and woe, or achieves each other.泰德寻觅多年的真命天女、万众期待的老妈，终于出现了！根据英国作家珍妮弗·沃斯的畅销回忆录改编，讲述上世纪五六十年代伦敦东区一群助产士的生活经历。本季故事承接2017年圣诞特辑，从1963年年初讲起，大雪给助产士们的工作和生活造成了诸多不便，Nonnatus House迎来一位新护士……