title: Absence of persisting parenchymal damage after extracorporeal shock wave lithotripsy as judged by excretion of renal tubular enzymes.
abstract: Four renal tubular enzymes, N-acetyl-beta-glucosaminidase, beta-galactosidase, angiotensin-converting enzyme and gamma-glutamyltransferase, were measured in the urine before, and 24 hours and 1 week after extracorporeal shock wave lithotripsy in 20 consecutive patients. Extracorporeal shock wave lithotripsy was performed on the Sonolith 2000 device with the patient under intravenous narcotic sedation with fentanyl. Enzymatic activity per gram of urinary creatinine was consistently but not significantly higher before extracorporeal shock wave lithotripsy than in control subjects. All 4 enzymes were elevated 24 hours after extracorporeal shock wave lithotripsy, with the increases in beta-galactosidase and angiotensin-converting enzyme being statistically significant. However, by 7 days after the procedure the enzymes had decreased to pre-procedure concentrations or below. These data suggest that any renal tubular damage induced by extracorporeal shock wave lithotripsy is of limited magnitude and brief duration.
authors.affiliation: Department of Urology, Long Island Jewish Medical Center, New Hyde Park, New York.
authors.forename: G S
authors.initials: GS
authors.lastname: Karlin
authors.forename: D
authors.initials: D
authors.lastname: Schulsinger
authors.forename: M
authors.initials: M
authors.lastname: Urivetsky
authors.forename: A D
authors.initials: AD
authors.lastname: Smith
mesh_terms: D000118:Acetylglucosaminidase / Q000652:urine; D000328:Adult; D000368:Aged; D006801:Humans; D007668:Kidney / Q000293:injuries*; D007684:Kidney Tubules / Q000201:enzymology*; D008096:Lithotripsy / Q000009:adverse effects; D008875:Middle Aged; D007703:Peptidyl-Dipeptidase A / Q000652:urine; D001616:beta-Galactosidase / Q000652:urine; D005723:gamma-Glutamyltransferase / Q000652:urine
chemical_list: D005723:gamma-Glutamyltransferase; D001616:beta-Galactosidase; D000118:Acetylglucosaminidase; D007703:Peptidyl-Dipeptidase A