超声评价正常小儿肝脏血管的内径及血流动力学

目的 通过超声检查获取正常小儿肝脏血管的内径及血流动力学参数测值.方法 对213名正常小儿进行二维及多普勒超声检查,测量肝动脉的内径及阻力指数(RI)、搏动指数(PI),门静脉主干及分支的内径、血流速度、血流量.测量数据进行相邻年龄组间比较.结果 肝动脉的内径随着年龄的增长而增加且相邻组间差异有统计学意义,R1和PI则是相对较恒定的参数.门静脉主干及分支的内径及血流量随着年龄的增长而递增,但增幅减小,幼儿期增长最明显.门静脉主干及分支的血流速呈现随年龄增长增高后有回落的趋势.结论 小儿肝脏血管的内径及血流动力学随其生长发育也在不断变化,其增长的特点与小儿生长发育特点相吻合.

Ultrasonographic evaluation of dimension and hemodynamic parameters of liver vessels in normal children

Objective To obtain the data of dimension and the hemodynamic parameters of liver vessels in normal children with ultrasonography. Methods The hepatic artery and portal vein were assessed with gray-scale sonography and color Doppler sonography in 213 normal children, and parameters including inner diameters of the observed vessels, pulsatility index (PI) and resistance index (RI) of hepatic artery, velocity and volumetric flow of portal vein were measured. All the data were compared with the contiguous groups. Results The values of inner diameter of hepatic artery increased with the growth of children, and the differences between the contiguous groups were significant. RI and PI were relatively invariable parameters. The increases of inner diameter and volumetric flow of portal vein were more significant in younger groups. The velocity of portal vein increased at first and then decreased during the growth. Conclusion The inner diameters and hemodynamic parameters of hepatic artery and portal vein are changeable with the growth of children, which is consistent with the growth characteristics of children.