Objective: Acute cerebral infarction is a disease with high mortality rate. Most of strokes are caused by embolism clot of artery. The ideal therapy is unimpeding these blocked vessels as early as possible. It very important to establish a animal model resemble human embolic stroke ,we depend on this model and carry out a experiment of thrombolysis therapy with urokinase, assess the effect of thrombolysis therapy therapy windows dose cerebral ischemic reperfusion damage etc .Make a theoretical b...