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动脉粥样硬化随着心脑疾病的发病率和死亡率的提高而日益受到重视。彩色多谱勒技术可以判断血管壁内膜的厚度和粥样斑块的大小,回声程度,但不能分辨斑块的病理成分,而斑块病理组织成分而非斑块所致的狭窄程度是斑块破裂及临床意外的决定原因。声学密度量技术反映硬化斑块不同的病理组织成分,钙化斑块背向散射积分值最高,纤维化次之,脂质较低,而血栓背向散射积分值最低。声学密度定量技术可评价动脉斑块的危险性,脂质核心越大,动脉粥样硬化斑块则越容易破裂,非均质性斑块是引起脑梗死等的危险因素,术中利用声学密度定量技术可降低斑块栓塞致卒中的危险性。声学密度定量技术是一种敏感性高、特异性好、准确度高的定性技术,为临床早期预防脑梗死的发生,提供一种客观、简便、可靠的新方法。
Atherosclerosis with the incidence of cardiovascular and cerebrovascular diseases and mortality increased and more attention. Color Doppler technique can determine the thickness of the intima of the blood vessel wall and the size of the atherosclerotic plaque, echogenicity, but can not distinguish the pathological components of the plaque, and plaque pathological tissue components rather than plaque caused by the degree of stenosis is spot Block rupture and clinical reasons for the accident. Acoustic densitometry reflects the different pathological components of sclerosis plaque, calcified plaque backscatter integral value of the highest, followed by fibrosis, lipid lower, and thrombosis backscatter integral value of the lowest. Acoustic densitometry quantitative evaluation of the risk of atherosclerotic plaque, the larger the lipid core, the more likely to be atherosclerotic plaque rupture, heterogeneous plaque is a risk factor for cerebral infarction caused by the use of intraoperative acoustic density Quantitative techniques can reduce the risk of stroke caused by plaque embolism. Acoustic densitometry is a sensitive technique with high sensitivity, specificity and accuracy. It provides an objective, simple and reliable new method for early prevention of cerebral infarction.