Abstract:

Objective To investigate the elastic properties of the common carotid arteries(CCA) in the right Internal carotid artery occlusion of cerebral infarction with high resolution ultrasound and echo-tracking technique. Methods Twenty cases with right cerebral infarction in hospital were investigated. Twenty healthy volunteers were selected as controls. The carotid arteries were scanned using a high frequency linear array probe. In cerebral infarction groups, the CCA were measured. Pressure-strain elasticmodulus(Ep), stiffness(β) and the arterial compliance(AC), augmentation index(AI), one-point pulse wave velocity(PWVβ) were obtained by echo-tracking technique. Results Ep, β, AI and PWVβ in Internal carotid artery occlusion group were significantly higher than those of control group, AC was lower than that of control group. There was positive correlations between Ep, AC, AI, PWVb, Ds, Dd and the sex. Conclusion Echo-tracking technique may be assess CCA elastic properties accurately and quantitatively. It is a simplicity method in assessing the artery elasticity.

Key words: Ultrasonography; Brain infarction; Carotid artery diseases; Elasticcity

摘要：

目的 探讨血管回声跟踪（E-Tracking）技术在颈内动脉（internal carotid artery，ICA）颅外段闭塞的脑梗死患者颈动脉弹性评价中的应用价值。 方法 选择20例右侧ICA颅外段闭塞的住院患者作为ICA闭塞组，20例ICA正常的健康志愿者作为对照组；应用E-Tracking技术实时跟踪描记右侧颈总动脉管壁运动轨迹，得出血管的收缩期内径（diameter of systolic，Ds）、舒张期内径（diameter of diastole，Dd）、压力-应变弹性系数（pressure-strain elastic modulus，Ep）、硬度指数（stiffness parameter，β）、顺应性（arterial compliance，AC）、脉搏波放大指数（augmentation index，AI）和单点脉搏波传导速度（one-point pulse wave velocity，PWVβ），对两组的上述指标进行比较研究。 结果 与对照组颈动脉弹性相比较，ICA闭塞组Ep、β、AI及PWVβ明显升高；AC明显减低，差异均有统计学意义。性别差异对ICA闭塞患者的颈动脉弹性参数改变无明显影响。 结论 应用E-Tracking技术可评价血管功能改变，它是评价血管动脉血管弹性功能的简便实用的方法。

关键词: 超声检查; 脑梗死; 颈动脉疾病; 弹性