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Related Experiment Videos

Morphological changes following ESWL in the rat kidney.

F Recker1, H Rübben, A Bex

  • 1Department of Urology, RWTH, Aachen, Federal Republic of Germany.

Urological Research
|January 1, 1989
PubMed
Summary

Extracorporeal shock-wave lithotripsy (ESWL) can cause immediate kidney damage, but it heals. Long-term effects, including fibrosis, depend on the shock wave dose and venous rupture.

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Area of Science:

  • Nephrology
  • Urology
  • Biomedical Engineering

Background:

  • Extracorporeal shock-wave lithotripsy (ESWL) is a common procedure for kidney stone removal.
  • Understanding the potential acute and long-term renal effects of ESWL is crucial for patient safety and treatment optimization.

Purpose of the Study:

  • To evaluate the acute and long-term histological and morphological effects of ESWL on Wistar rat kidneys.
  • To determine the relationship between shock wave dosage and the extent of renal lesions.

Main Methods:

  • Fifty-four Wistar rats were subjected to 500, 1,000, or 2,000 shock waves using a modified DORNIER HM 3 system.
  • Animals were analyzed at 24 hours, 7 days, and 35 days post-treatment using histology, scanning electron microscopy (SEM), and magnetic resonance imaging (MRI).

Main Results:

  • Acute effects included glomerular bleeding, tubular dilatation, atrophy, necrosis, and loss of microvilli/cilia, with evidence of healing (restitutio ad integrum).
  • Long-term lesions were characterized by interstitial hematomas resulting from venous rupture, progressing to fibrosis, reduced blood supply, and secondary atrophy/sclerosis.
  • The severity of long-term renal damage was dose-dependent, increasing with up to 2,000 shock waves.

Conclusions:

  • ESWL causes transient acute kidney injury that can fully recover.
  • Venous rupture during ESWL is a key mechanism leading to dose-dependent long-term renal fibrosis and secondary damage.
  • Careful consideration of shock wave dosage is necessary to minimize potential long-term renal complications.

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