Age-related changes in resistive index following extracorporeal shock wave lithotripsy.

Knapp, R; Frauscher, F; Helweg, G; zur Nedden, D; Strasser, H; Janetschek, G; Bartsch, G · J Urol · 1995

cross_sectional · Level IV

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Abstract

Changes in intrarenal vascular resistance after extracorporeal shock wave lithotripsy (ESWL*) were studied with Doppler ultrasound techniques. In 76 patients the resistive index was measured at an interlobar artery before and after ESWL in the treated and contralateral kidneys. The resistive index levels were compared to N-acetyl-beta-D-glucosaminidase levels in 40 patients. We found an age-related positive linear correlation between post-therapeutic resistive index increases and patient age. N-acetyl-beta-D-glucosaminidase levels were also elevated after ESWL but these elevations were not age-related. Elderly patients have a higher risk of post-ESWL renal tissue damage.

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