FIG. 7.

Renal parenchymal lesion in pig kidneys treated using the TRT LG-380 and Dornier HM3 lithotriptors. Frame A shows small foci of hemorrhage (arrows) in the lower pole medulla of a pig kidney treated using the multistep power ramping protocol (PL 1–8 @50, PL-9 2600 SW, 60 SW/min) recommended by TRT. Lesion volume in this group of animals measured <0.1% FRV (n=4). Frame B shows lower pole medullary lesions (arrows) in the kidney of a pig treated using the Dornier HM3 fired at 60 SW/min (2000 SW, 24 kV), while frame C shows a larger region of hemorrhage (arrows) extending from the cortex to medulla in a kidney treated at the same dose (2000 SW, 24 kV) but at 120 SW/min. Lesion volume of renal parenchyma, expressed as functional renal volume, in these representative sections measured 0.42% and 3.9% FRV, respectively. Data for renal injury with the Dornier HM3 have been reported previously.^31–33,38