低分子右旋糖酐为平均分子量40000左右的右旋糖酐,属血管扩容剂,可增加血容量,使血液稀释,降低血液粘稠度,从而达到防止和消除红细胞及血小板的聚集作用。因此,可用于缺血性脑血管病的治疗。但在脑梗塞急性期,尤其是大范围梗塞时,往往病灶周围脑水肿明显,患者的临床症状也较重,常有头痛, Low molecular weight dextran is an average molecular weight of about 40,000 dextran, is a vasodilator, can increase blood volume, blood thinning, reduce blood viscosity, so as to prevent and eliminate the aggregation of red blood cells and platelets. Therefore, can be used for the treatment of ischemic cerebrovascular disease. However, in the acute stage of cerebral infarction, especially in a wide range of infarctions, brain edema is often evident around the lesion, the patient’s clinical symptoms are also heavier, often headache,