Mostbeck G H, Kain R, Mallek R, Derfler K, Walter R, Havelec L, Tscholakoff D
Division of Radiology, University of Vienna Hospital, Austria.
J Ultrasound Med. 1991 Apr;10(4):189-94. doi: 10.7863/jum.1991.10.4.189.
To evaluate the histopathologic changes influencing Doppler measurements of the resistive index (RI) in renal arteries in renal parenchymal diseases, 68 kidneys in 34 consecutive patients with various forms of renal parenchymal diseases were studied by duplex Doppler ultrasound (duplex US) immediately before percutaneous renal biopsy. The RI, renal length, and renal cortical echogenicity were correlated with the amount of glomerular, interstitial, and vascular changes graded on a scale from 0 to 100. The renal vascular resistance and therefore the RI are significantly correlated with the prevalence of arteriolosclerosis, glomerular sclerosis, arteriosclerosis, edema, and focal interstitial fibrosis. There was no significant difference of the RI in five groups of different renal parenchymal diseases. Of 34 patients, 24 presented with an RI less than 0.7, which was thought to be within the normal range so far. Additionally, the RI increases as the patient's age increases, due to higher incidence of arteriosclerosis. Of our patients, 44% presented with normal cortical echogenicity. Quantitative duplex US using the RI does not reliably distinguish different types of renal medical disorders.
为评估肾实质疾病中影响肾动脉阻力指数（RI）多普勒测量的组织病理学变化，在经皮肾活检前，对34例患有各种形式肾实质疾病的连续患者的68个肾脏进行了双功多普勒超声（双功超声）研究。RI、肾长度和肾皮质回声与按0至100分级的肾小球、间质和血管变化量相关。肾血管阻力以及因此的RI与小动脉硬化、肾小球硬化、动脉硬化、水肿和局灶性间质纤维化的患病率显著相关。五组不同肾实质疾病的RI无显著差异。34例患者中，24例的RI小于0.7，迄今为止这被认为在正常范围内。此外，由于动脉硬化发病率较高，RI随患者年龄增加而升高。我们的患者中，44%的肾皮质回声正常。使用RI的定量双功超声不能可靠地区分不同类型的肾脏疾病。
