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[The functional assessment of the renal parenchyma and perirenal fatty tissue during electropiezolithotripsy by x-ray computed tomography].

Computed tomography was performed before and after telelithotripsy to evaluate changes in renal parenchyma induced by the procedure in 34 patients with nephroliths. Piezolith-2300 lithotriptor ("Wolf", FRG) was employed. The images showed no serious parenchymal injuries or paranephric hematomas, on the one hand, but density changes in the parenchyma, on the other hand. These were of 3 types: focal reduction in 3, diffuse reduction in 4 and diffuse increase of the density in 2 patients. As shown by comparison with literature data, telelithotripsy on "Piezolith-2300" causes minimal changes in renal parenchyma and perirenal fat. In view of this, the procedure is recommended for wide clinical and outpatient practice.