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Haemostatic partial nephrectomy using bipolar radiofrequency ablation.

Gyan Pareek1, Eric R Wilkinson, David Schutt

  • 1Department of Surgery/Division of Urology, University of Wisconsin Medical School, 600 Highland Avenue, Madison, WI 53792, USA. gypmd@aol.com

BJU International
|October 18, 2005
PubMed
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Bipolar radiofrequency ablation (RFA) effectively performs haemostatic partial nephrectomy in porcine kidneys, achieving bloodless excision with intact collecting systems. This RFA electrode array shows promise for minimally invasive renal surgery.

Area of Science:

  • Urology
  • Surgical Technology
  • Nephrology

Background:

  • Partial nephrectomy is crucial for kidney preservation.
  • Achieving haemostasis and preserving renal function during partial nephrectomy remains a challenge.

Purpose of the Study:

  • To evaluate the efficacy of a bipolar radiofrequency ablation (RFA) electrode array for haemostatic partial nephrectomy.
  • To assess simultaneous ablation and coagulation of renal tissue using RFA.

Main Methods:

  • Lower-pole partial nephrectomy was performed on 12 porcine kidneys using a bipolar RFA system.
  • Intraoperative ultrasonography guided the procedure, avoiding the collecting system.
  • Tissue impedance monitoring and histological analysis assessed ablation effectiveness and safety.

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Main Results:

  • Successful partial nephrectomies were completed in all 12 kidneys.
  • The procedure resulted in a mean 9 mm necrotic margin, ensuring haemostasis without abnormal bleeding.
  • Collecting system integrity was maintained in 11 of 12 kidneys.

Conclusions:

  • Bipolar RFA enables transmural renal parenchyma excision in vivo.
  • The technique facilitates a bloodless partial nephrectomy with minimal risk of collecting system injury.