Department of Radiology and Diagnostic Imaging, Medical University of Łódź, Kopcińskiego 22, 90-153, Łódź, Poland.
Department of Angiology, Interfaculty Chair of Anatomy and Histology, Medical University of Lodz, Poland, Żeligowskiego 7/9, 90-752, Łódź, Poland.
BMC Cardiovasc Disord. 2019 Jul 30;19(1):181. doi: 10.1186/s12872-019-1163-7.
Considering vital role of renal arteries in many surgical procedures, diameter of renal arteries seems to be an important measure of kidney perfusion. In this study, we analyzed a new parameter, renal-aortic ratio (R-Ar) as an objective measure of the renal artery diameter.
The study included CT angiographic images from 254 patients (129 women and 125 men). R-Ar was calculated by dividing the diameter of the main renal artery for each kidney by the aortic diameter.
R-Ar values for the whole study group ranged between 0.0863 and 0.5083; the ranges of R-Ar values for women and men patients were 0.1150-0.5083 and 0.0863-0.4449, respectively. In 412 cases (81.10%), the kidney was supplied by a single renal artery (RA variant) and in 96 (18.90%) by more than one artery (sRA variant). A significant difference was found in R-Ar values for RA and sRA variants (p = 0.0008). When the anatomical variant of renal perfusion was not considered on statistical analysis, a significant difference was found between the R-Ar values for women and men (p = 0.0259). No statistically significant difference was observed in R-Ar values for the right and left kidneys (p = 0.3123). Spearman's coefficient of rank correlation between patient age and renal-aortic ratio values for the whole study group equaled - 0.36.
The analysis of the renal-aortic ratio values demonstrated that the diameter of renal arteries depended primarily on their number, and the relative diameter of renal arteries in women was larger than in men.
考虑到肾动脉在许多外科手术中的重要作用，肾动脉的直径似乎是衡量肾脏灌注的一个重要指标。在本研究中，我们分析了一个新的参数，即肾-主动脉比（R-Ar），作为肾动脉直径的客观测量指标。
本研究纳入了 254 例患者的 CT 血管造影图像（129 名女性和 125 名男性）。通过将每侧肾脏的主肾动脉直径除以主动脉直径来计算 R-Ar。
整个研究组的 R-Ar 值范围为 0.0863 至 0.5083；女性和男性患者的 R-Ar 值范围分别为 0.1150-0.5083 和 0.0863-0.4449。在 412 例（81.10%）中，肾脏由单支肾动脉（RA 变异型）供血，96 例（18.90%）由多支动脉（sRA 变异型）供血。RA 和 sRA 变异型的 R-Ar 值存在显著差异（p=0.0008）。在统计分析中不考虑肾灌注的解剖学变异时，女性和男性的 R-Ar 值之间存在显著差异（p=0.0259）。左右肾脏的 R-Ar 值之间没有观察到统计学显著差异（p=0.3123）。整个研究组患者年龄与肾-主动脉比之间的 Spearman 秩相关系数为-0.36。
对肾-主动脉比值的分析表明，肾动脉的直径主要取决于其数量，女性的肾动脉相对直径大于男性。
