By this way, all collateral circulation were interdicted.

部用一橡皮带环扎，以阻断侧技循环。

Encephalic and extracranial collateral circulation was established.

颅内外侧支循环广泛形成。

Results: All patients after CAS and CEA had good results and the established collateral circulation were closed.

结果：CAS及CEA均有明显疗效，术后全部侧支循环关闭。

Clinical manifestations as vascular involvement , disease , ischemia , as well as whether to establish collateral circulation may be.

临床表现视血管受累、病变程度、局部缺血情况以及侧支循环是否建立而定。

But until recently, researchers didn't know what linked those risk factors together, when it comes to insufficiency of the collateral circulation.

但直到最近，研究人员不知道什么将这些危险因素联系在一起，当涉及到支循环不足时。

Patient's cerebral blood flow needs to be evaluated preoperatively, and observes the compensation of collateral circulation after blocking or occluding parental artery.

术前需要对患者脑血流进行充分评价，试验观察阻断或闭塞载瘤动脉后侧支循环代偿情况。