彩色多普勒对肠系膜上动脉餐前、后血流动力学改变的研究

摘要

Objective:To investigate the fasting and po stprandial hemodynamic changes in the superior mesenteric artery(SMA)in healthy subjects and its clinical significance.Methods：Fifty five healthy subjects underwent Doppler son ography of the SMA before and after ingesting a standard meal(25% glucose 200ml) .The hemodynamic parameters were obtained.Results:Significant difference of Doppler parameters of SMA wa s found between fasting and postprandial state(P＜0.05).The velocities and volumes in SMA were increased from baseline values after glucose ingestion.The r esistance index(RI)and pulsatile index(PI)were decreased significantly.Conclusions:There are hemodynamic changes of SMA in different physical states.It is important for physicians to know the range of normal values.%目的：研究正常成人肠系膜上动脉(SMA)餐 前、后血流动力学改变，探讨其临床意义。方法：应用多普勒超声分别测量55例正常成人餐前、后SMA的血流参数，包括 SMA的直径(D)，收缩期峰值速度(Vmax)，舒张末期速度(Vmin),时间平均速度(Vmean),及阻 力指数(RI)，搏动指数(PI)，分析其差异性，并提出正常值范围。试餐用25%的葡萄糖200ml ，餐后30分钟检查。结果：正常成人餐前、后SMA血流动力学各参数间存在显著差异(P＜0.0 5)，餐后血流速度和血流量明显高于餐前，而RI和PI均显著降低。结论：认识不同生理状态下SMA血流动力学改变及其正常值范围对临床有重要意义。