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中分子右旋糖酐注射液早在1957年,国内即开始用于临床,作为血浆代用品。六十年代发现其低分子产品,具有改善微循环、抗血栓和扩充血容量的作用,临床用于各种血栓性疾病,取得了一定疗效。右旋糖酐(以下简称右酐)系葡萄糖组成的多糖,又名葡聚糖或葡聚精(dextranum)。由于分子中葡萄糖部分相互连接的方式和数量不尽相同,所以实际上它是由分子量大小不等的分子所组成的多分散系统。一般所说的分子量皆指平均分子量而言(在本文中均为平均分子量)。中分子右酐分子量约为70000,其中分子量在50000～100000之间的部分占90%,小于25000和大于200000的部分不超过10%,低分子右酐的分子量为40000,分子量在10000～80000之间的部分占90%;
Molecular dextran injection as early as 1957, the country began to be used clinically, as a plasma substitute. Sixty time discovery of its low molecular weight products, with the role of improving microcirculation, anti-thrombosis and expansion of blood volume, clinical use for a variety of thrombotic diseases, and achieved a certain effect. Dextran (hereinafter referred to as right anhydride) is a polysaccharide composed of glucose, also known as dextran or dextran (dextranum). Due to the fact that glucose molecules in the molecule are connected in different ways and in different numbers, it is actually a polydisperse system composed of molecules of different molecular weights. Generally speaking, the molecular weight refers to both the average molecular weight (in this article are average molecular weight). Molecular weight of the right molecular anhydride about 70,000, of which the molecular weight of 50,000 to 100,000 in the part of 90%, less than 25,000 and more than 200,000 parts of not more than 10%, low molecular weight right molecular weight of 40,000 anhydride, molecular weight of 10,000 to 80,000 Between the part of 90%;