title: Age-related changes in resistive index following extracorporeal shock wave lithotripsy.
abstract: OBJECTIVE
  Changes in intrarenal vascular resistance after extracorporeal shock wave lithotripsy (ESWL*) were studied with Doppler ultrasound techniques.
  
  
  METHODS
  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.
  
  
  RESULTS
  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.
  
  
  CONCLUSIONS
  Elderly patients have a higher risk of post-ESWL renal tissue damage.
authors.affiliation: Department of Diagnostic Radiology II, University of Innsbruck, Austria.
authors.forename: R
authors.initials: R
authors.lastname: Knapp
authors.forename: F
authors.initials: F
authors.lastname: Frauscher
authors.forename: G
authors.initials: G
authors.lastname: Helweg
authors.forename: D
authors.initials: D
authors.lastname: zur Nedden
authors.forename: H
authors.initials: H
authors.lastname: Strasser
authors.forename: G
authors.initials: G
authors.lastname: Janetschek
authors.forename: G
authors.initials: G
authors.lastname: Bartsch
mesh_terms: D000118:Acetylglucosaminidase / Q000097:blood; D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D005260:Female; D006801:Humans; D007668:Kidney / Q000000981:diagnostic imaging; D008096:Lithotripsy / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D012079:Renal Circulation / Q000502:physiology*; D018608:Ultrasonography, Doppler; D014655:Vascular Resistance / Q000502:physiology*
chemical_list: D000118:Acetylglucosaminidase