彩色多普勒超声对胸降主动脉血流动力学的研究

Color Doppler ultrasound in the study of hemodynamics of descending aorta

目的:本研究应用彩色多普勒超声技术检测正常人和高血压患者胸降主动脉血流,探讨胸降主动脉血流动力学在StanfordB型动脉瘤发生机制中的作用。方法:正常组(87例)和高血压组(20例),多点测量主动脉弓降段多普勒血流频谱。结果:两组胸降主动脉段均发现高速血流区域;组间高峰值距离、两组不同部位流速均有显著性差异且从内侧壁到外侧壁速率递减。结论:人体胸降主动脉内存在高速血流区可能与动脉瘤发生机制有关。

Objective： To evaluate color Doppler ultrasound in the study of hemodynamics of descending aorta of normal subjects and patients with hypertension to find the role of hemodynamics of descending thoracic aorta in the pathologic mechanism of Stanford B dissecting aneurysm. Methods： The hemodynamic parameters of the descending aorta were measured by the color Doppler ultrasound in 87 normal subjects and 20 hypertensive patients to test Doppler blood stream spectrum of aortic arch at some sites. Results： High blood speed region were found at the descending aorta in both teams. There was significant difference in the peak distance between the two teams, and so it was with blood flow speed of infra-team and intrateam in different sites. And the velocity from inner-wall to outer-wall was descending. Conclusion： The high speed region in descending thoracic aorta may be associated with the pathologic mechanism of dissecting aneurysm.