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目的：研究颅外颈动脉硬化性斑块形态与脑缺血症状的关系。方法：运用Ｄｕｐｌｅｘ超声对１８８例患者行颈颅外段动脉检测。将颅外颈内动脉狭窄度分成五级，颈内动脉斑块形态分成四型。结果：本研究共对３７６侧颈动脉行狭窄度检测，对２１３侧颈动脉行斑块形态学分型。结果显示。颈动脉硬化斑块的狭窄度和形态学类型与脑缺血症状的发生均有密切关系（Ｐ＜０．０１）。斑块形态学类型与狭窄度两因素之间有密切的内在联系，但斑块形态学的改变并不增加狭窄度预测脑缺血症状发生的敏感性。结论：颈动脉斑块类型随着其狭窄度的增加而改变，斑块形态不能作为预测脑缺血症状发生的独立危险因素。
Objective: To study the relationship between extracranial carotid artery plaque morphology and cerebral ischemia. Methods: Duplex ultrasonography was used to detect the extracranial carotid artery in 188 patients. The extracranial internal carotid artery stenosis is divided into five levels, the carotid artery plaque morphology is divided into four types. Results: A total of 376 carotid arteries were examined for stenosis in this study. Plaque morphology was performed on 213 carotid arteries. The results show. The stenosis and morphology of carotid plaque were closely related to the occurrence of cerebral ischemia (P <0.01). There is a close relationship between the two types of plaque morphology and stenosis. However, the change of plaque morphology does not increase the sensitivity of stenosis to predict the occurrence of cerebral ischemia. Conclusion: Carotid plaque type changes with the increase of its stenosis. Plaque morphology can not be used as an independent risk factor for predicting cerebral ischemia.