目的观察脑保护滤网在颈动脉支架成形术中的疗效和安全性。

Objective To observe the effect and safety of cerebral protection filters in the prevention of cerebral embolic events during carotid angioplasty and stenting.

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目的应用经颅多普勒超声（TCD）动态观察脑保护滤网下颈动脉支架成形术中各操作阶段所产生的微栓子信号（MES）数量。

Objective Transcranial Doppler (TCD) can be used to monitor microembolic signals (MES) in different procedure phases during filter-protected carotid angioplasty and stenting(CAS).

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