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内镜下食管曲张静脉套扎术（ｅｎｄｏｓｃｏｐｉｃｖａｒｉｃｅａｌｌｉｇａ－ｔｉｏｎ，ＥＶＬ）对门脉静血液动力学影响的研究甚少［１，２］，我们应用彩色多普勒超声仪观察ＥＶＬ前后门静脉内径、血流速度及胃左静脉血流方向和速度的变化，对这方面作一初步研究。１．研究
Endoscopic variceal ligation (endoscopic varicealliga-tion, EVL) on portal vein hemodynamics rarely studied [1,2], we use color Doppler ultrasound before and after the portal vein diameter, blood flow Speed and gastric left venous flow direction and velocity changes, make a preliminary study in this regard. 1. the study