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脑梗死是中老年人的一种多发病，致残率和死亡率相当高，其病因、发病机制复杂，现有的治疗方法及药物种类繁多，为判断并选择出一种临床较为有效的药物，我科于1998年使用了中美合资烟台北方制药有限公司生产的降纤酶（卫生部。国家脑防办进行全国大样本、多中心、双盲试验选?
Cerebral infarction is a kind of frequently-occurring disease in the middle-aged and old people. The morbidity and mortality rate are quite high. The etiology and pathogenesis of the disease are complex. There are many kinds of existing treatments and medicines. To judge and choose a clinically effective medicine , Our department used defibrase produced by Sino-U.S. Joint venture Yantai North Pharmaceutical Co., Ltd. (Ministry of Health, National EAC for nationwide large sample, multicenter, double-blind trial selection in 1998)