Association of shear wave elastography finding with grayscale and color doppler ultrasound in normal function kidney transplanted

Abstract

Evaluation of parenchymal and corticomedullary changes through non-invasive methods such as ultrasound as well as flow evaluation of renal arteries based on changes in the RI index of these arteries play an important role in predicting functional changes in transplanted kidneys. What we discussed in this study is the evaluation of the state of the parameters obtained from the sonographic evaluation of the kidney parenchyma and corticomedullary (based on gray-scale sonography) and renal arterial flow parameters (based on the evaluation of the RI index with Doppler ultrasound), as well as the examination of shear wave or tissue tension on The basis of the SWE technique in the kidney was a link with normal function, and in the second stage of evaluation, we examined the correlation between these parameters. Methods: This study was an analytical cross-sectional study. Patients with at least three months past allograft transplantation and with normal renal function (based on GFR and serum creatinine level) were included in the evaluation. First, the patients were evaluated with Doppler ultrasound, and the renal resistive index and the thickness of the renal cortex were evaluated. Then, the patients were evaluated with gray scale ultrasound and the echogenicity of the kidney parenchyma was also examined. Following the above two evaluations, all patients were evaluated with SWE. Results: The range of changes in RI of renal artery between 0.52 and 0.73, RI of upper interlobar artery between 0.53 and 0.75, RI of middle interlobar artery between 0.54 and 0.76 and RI of lower interlobar artery between 0.50 It was up to 0.75, which were all within the normal range. Also, in the shear wave evaluation of transplanted kidneys with normal function, the range of this index in the lower, middle and upper bridges of the mentioned kidney is in the range of (5.9 to 24.8), (1.15 to 31.7) and (9/1 to 5/26) was the normal range. No significant relationship between elastography number and eGFR was reported. The mean number of kidney elastography was reported to be 19.17 ± 3.8. The average number of eGFR was reported to be 13.12±66, which is within the normal range.