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Related Experiment Videos

A decrease in blood pressure following pyelolithotomy but not extracorporeal lithotripsy.

Davor Eterović1, Marijan Situm, Ljubica Juretić-Kuscić

  • 1Department of Physiology and Biophysics, Medical School in Split, Soltanska 2, 21000 Split, Croatia. eterovic@bsb.mefst.hr

Urological Research
|December 25, 2004
PubMed
Summary

Surgically removing kidney stones lowers blood pressure by normalizing renal vascular resistance. Electrical shockwave lithotripsy (ESWL) did not significantly alter blood pressure or resistance, potentially due to balancing obstruction relief with shockwave-induced kidney injury.

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Area of Science:

  • Nephrology
  • Urology
  • Cardiovascular Medicine

Background:

  • Renal obstruction from stones can elevate arterial blood pressure.
  • The impact of stone removal on blood pressure and renal hemodynamics requires further investigation.

Purpose of the Study:

  • To test if relieving renal obstruction lowers arterial blood pressure without causing kidney injury.
  • To compare the effects of surgical pyelolithotomy and electrical shockwave lithotripsy (ESWL) on blood pressure and renal vascular resistance.

Main Methods:

  • Sixty patients with unilateral renal stones underwent either ESWL (n=30) or Gil-Vernet pyelolithotomy (n=30).
  • Blood pressure was measured noninvasively; renal vascular resistance was determined via radionuclide assessment of renal blood flow.
  • Evaluations were conducted at baseline and 3 months post-procedure.

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Main Results:

  • In the pyelolithotomy group, diastolic blood pressure decreased from 87 to 81 mm Hg (P=0.002) and systolic from 140 to 132 mm Hg (P<0.0001).
  • Post-pyelolithotomy, renal vascular resistances normalized and became equal between kidneys.
  • In the ESWL group, blood pressure and renal vascular resistance remained unchanged from baseline.

Conclusions:

  • Surgical relief of renal obstruction can chronically lower arterial blood pressure, likely by normalizing renal vascular resistance.
  • ESWL did not affect blood pressure or renal vascular resistance, suggesting a balance between obstruction relief and potential shockwave-induced renal lesions.