METHOD OF DIFFERENTIAL DIAGNOSIS OF ACUTE RENAL INJURY Russian patent published in 2025 - IPC A61B5/55 A61B5/26 

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to radiation diagnostics, nephrology, urology, toxicology, cardiology, gastroenterology, infectious diseases, intensive care, and can be used for the differential diagnosis of acute renal injury (ARI). Magnetic resonance imaging (MRI) of the kidneys is performed in ASL and diffusion-weighted imaging (DWI) modes. The right and left renal arteries are visualized, and ASL perfusion of the renal arteries on both sides is determined. With ASL perfusion in the renal arteries from 100 to 115 ml/ 100 g/min and the absence of diffusion restriction, the renal parenchyma is black, and ARI of prerenal etiology is diagnosed. With ASL perfusion in the renal arteries from 100 to 115 ml/100 g/min and limited diffusion, the color is white according to renal parenchyma, ARI of renal etiology is diagnosed. With ASL perfusion in the renal arteries of 116-232 ml/100 g/min and the absence of diffusion restriction, the renal parenchyma is black, and ARI of postrenal etiology is diagnosed. When ASL perfusion in the renal arteries is more than or equal to 233 ml/100 g/min and there is no restriction of diffusion, the color of the kidney parenchyma is black, it is concluded that there is no ARI.

EFFECT: method allows to determine the cause of ARI non-invasively in a timely manner, prescribe ARI treatment, thereby timely stop and lead to a complete cure of ARI by assessing ASL perfusion in the renal arteries.

1 cl, 9 ex