Kaluzynski K, Liepsch D
Laboratory for Fluid mechanics, Fachhochschule München, FRG.
Technol Health Care. 1995 Dec;3(3):153-9.
The purpose of this work was to find out whether a rough surface in the sinus of a carotid model affects the flow velocity distribution and the properties of the corresponding ultrasonic Doppler spectrum, in view of potential application to the evaluation of risk of cerebral embolism. True-to-scale elastic models of carotid artery were used in the experiments. Experiments were performed in three models with varying severity of roughness and a normal (physiological healthy) model. The different degrees of roughness in the three models were created by melting graded holes in the wax cast used to make the model. Velocity data were collected using 4 Mhz pulsed ultrasonic and single component laser Doppler velocimeters. The roughness resulted in modified velocity distribution, affecting to various extent ultrasonic Doppler spectral parameters, in particular the measure of symmetry of spectral distribution.
鉴于在评估脑栓塞风险方面的潜在应用，这项工作的目的是研究颈动脉模型窦部的粗糙表面是否会影响血流速度分布以及相应超声多普勒频谱的特性。实验中使用了按比例制作的颈动脉弹性模型。在三个具有不同粗糙度严重程度的模型以及一个正常（生理健康）模型上进行了实验。通过在用于制作模型的蜡模上熔化分级孔来制造三个模型中不同程度的粗糙度。使用4兆赫脉冲超声和单分量激光多普勒测速仪收集速度数据。粗糙度导致速度分布发生改变，不同程度地影响超声多普勒频谱参数，特别是频谱分布的对称性测量。
