正常人肝动脉及其分支的彩色多普勒探查

目的探讨正常人的肝动脉及其分支的血流动力学特点.方法应用彩色多普勒超声对30例正常人肝动脉及其分支,包括第一肝门处肝动脉主干(HA1)、门静脉左支矢状切面处的左肝动脉(HA2)、右肝动脉近末梢支(HA3)的血流进行多普勒频谱分析,观察搏动指数(PI)、阻力指数(RI)、收缩期峰值流速(PSV)、平均流速(Vm)和舒张末流速(EDV).结果正常人HA1及其HA2超声显示率100%,HA3显示率为80%(24/30).各级肝动脉的PI(搏动指数)和RI(阻力指数)无明显统计学差异,而各级肝动脉的流速(包括PSV、Vm、EDV)自主干向分支递减,各组间存在明显统计学差异.结论影响肝动脉的彩色多普勒显示率和频谱参数的因素较多,超声医师必须熟悉解剖,掌握操作技巧和彩色多普勒技术,寻找合适的检查部位.

Color Doppler ultrasound in evaluation of hepatic arteryand its branches in healthy subjects

Objective To investigate hemodynamic changes of the hepatic artery and its branches in healthy subjects in order to provide basic data for diagnosing cirrhosis, and follow up hepatic arterial blood flow in patients with liver transplantation. Methods The hepatic artery and its branches, including HA1, HA2, HA3, were assessed with color Doppler ultrasound in 30 controls, and parameters including pulsatility index (PI), resistance index (RI), peak systolic velocity(PSV), diastolic velocity (EDV) and mean velocity (Vm) were measured. Results HA1 and HA2 were detected in all the patients (100%), but HA3 was only detected in 24 patients (80%). There were significant differences of flow velocities between groups, which included: PSV, EDV, Vm, but no significant differences in PI and RI were found between groups. Conclusion Color Doppler ultrasound provides a noninvasive and convenient measurement of hepatic artery and its branches. However, results of Doppler measurements and detectability can be influenced by many factors. So that it is important for ultrasound performers to familiar with anatomy, scan skills and color Doppler technology.