Schwaighofer B, Kainberger F, Fruehwald F, Huebsch P, Gritzmann N, Karnel F, Tscholakoff D
Department of Diagnostic Radiology, University of Vienna, Austria.
Acta Radiol. 1989 Jan-Feb;30(1):53-6.
Thirty-five patients with normal renal allografts as well as 10 healthy volunteers with normal native kidneys were examined by duplex sonography. Blood flow measurements were performed in the main renal artery as well as in segmental, interlobar and arcuate arteries. In both groups the normal range of variation in blood flow was defined by using the resistive index (RI). Doppler wave forms and RI of main renal arteries were both similar to those of their branches. In renal allografts as well as in native kidneys the blood flow pattern showed a rapid up-slope in systole followed by a gradual down-slope in early diastole, with a persistent flow throughout diastole. In addition, there was no significant difference in the RI between allografted and native kidneys. The interobserver variability was less than 10 per cent. The mean RI was 0.68 using all data points. Vascular rejection in 11 patients could be discriminated significantly (p less than 0.001). Duplex sonography is useful in evaluating renal blood flow. This simple and non-invasive technique seems to be useful in long-term follow-up of renal allograft recipients.
对35例肾移植正常的患者以及10例健康志愿者的正常自体肾进行了双功超声检查。在肾主动脉以及段动脉、叶间动脉和弓状动脉中进行血流测量。在两组中，通过使用阻力指数（RI）来确定血流变化的正常范围。肾主动脉的多普勒波形和RI与其分支的相似。在肾移植以及自体肾中，血流模式表现为收缩期快速上升，随后在舒张早期逐渐下降，整个舒张期血流持续。此外，移植肾和自体肾的RI之间无显著差异。观察者间的变异性小于10%。使用所有数据点时，平均RI为0.68。11例患者的血管排斥反应可被显著区分（p<0.001）。双功超声在评估肾血流方面很有用。这种简单且无创的技术似乎对肾移植受者的长期随访很有用。
