Barreiro-Vázquez J Daniel, Miranda Marta, Barreiro-Lois Andrés
Department of Anatomy, Animal Production and Clinical Veterinary Sciences, Faculty of Veterinary Medicine, University of Santiago de Compostela, 27002 Lugo, Spain.
Veterinary Teaching Hospital "Rof-Codina", Faculty of Veterinary Medicine, University of Santiago de Compostela, 27002 Lugo, Spain.
Animals (Basel). 2020 Dec 31;11(1):63. doi: 10.3390/ani11010063.
There is a notable lack of reference values for the renal resistive indices in the bovine kidney. Ultrasound (US) Doppler evaluation of these indices is a powerful, non-invasive technique for assessing, monitoring and diagnosing renal diseases in humans and other animals (e.g., small animals and horses). The aims of the present study were to establish a protocol for renal Doppler US in adult healthy Holstein-Friesian cows and to provide reference values for the renal resistive index (RI) and pulsatility index (PI). In cattle, the right kidney is always visible through a right abdominal window. Nevertheless, the left kidney is rarely accessible by transabdominal ultrasound. Doppler evaluation of the kidneys via a transabdominal approach is possible when accessible, but measurements can only be made in the larger vessels at the renal hilum. Normal RI and PI values were respectively 0.49 ± 0.07 and 0.70 ± 0.15 for the right kidney and 0.53 ± 0.05 and 0.79 ± 0.11 for the left kidney. We suggest an upper cut-off value for the RI of 0.63 and for the PI of 1.00 in healthy Holstein-Friesian cows. This is the first report describing normal values for the renal RI and PI in cattle that may be useful in future studies for characterizing different bovine pathologies that affect the renal parenchyma.
目前关于牛肾肾阻力指数的参考值明显缺乏。超声（US）多普勒评估这些指数是一种用于评估、监测和诊断人类及其他动物（如小动物和马）肾脏疾病的强大的非侵入性技术。本研究的目的是建立成年健康荷斯坦-弗里生奶牛肾脏多普勒超声检查方案，并提供肾阻力指数（RI）和搏动指数（PI）的参考值。在牛中，右肾总是可以通过右侧腹部窗口看到。然而，经腹部超声很少能探测到左肾。当可以探测到时，经腹部途径对肾脏进行多普勒评估是可行的，但只能在肾门处较大的血管中进行测量。右肾的正常RI和PI值分别为0.49±0.07和0.70±0.15，左肾分别为0.53±0.05和0.79±0.11。我们建议健康荷斯坦-弗里生奶牛的RI上限值为0.63，PI上限值为1.00。这是第一份描述牛肾RI和PI正常值的报告，可能对未来研究中表征影响肾实质的不同牛病理状况有用。
