目前 ,国外多中心大宗病例双盲对照临床结果表明 ,脑梗塞发病 6小时后脑保护和血管再通治疗基本无效。并且对此6小时治疗时间窗也有异议。由于个体差异 ,脑缺血程度 ,侧支循环建立的快慢及多少各不相同。因此 ,治疗时间窗也不可能千篇一律。部分病人在超过 6小时后的一定时间内 At present, the double-blind control clinical results of bulk cases in foreign countries indicate that cerebral protection and revascularization therapy are basically ineffective after 6 hours of onset of cerebral infarction. And this 6-hour treatment time window also has objections. Due to individual differences, the degree of cerebral ischemia, collateral circulation to establish the speed and number of different. Therefore, the treatment time window can not be stereotyped. Some patients in more than 6 hours after a certain period of time