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• W2039408601 abstract "No AccessJournal of UrologyINVESTIGATIVE UROLOGY1 Jul 2001LAPAROSCOPIC RADIOFREQUENCY THERMAL ABLATION OF RENAL TISSUE WITH AND WITHOUT HILAR OCCLUSION T. Spark Corwin, Guy Lindberg, Olivier Traxer, Matthew T. Gettman, Thomas G. Smith, Margaret S. Pearle, and Jeffrey A. Cadeddu T. Spark CorwinT. Spark Corwin More articles by this author , Guy LindbergGuy Lindberg More articles by this author , Olivier TraxerOlivier Traxer More articles by this author , Matthew T. GettmanMatthew T. Gettman More articles by this author , Thomas G. SmithThomas G. Smith More articles by this author , Margaret S. PearleMargaret S. Pearle More articles by this author , and Jeffrey A. CadedduJeffrey A. Cadeddu More articles by this author View All Author Informationhttps://doi.org/10.1016/S0022-5347(05)66145-9AboutFull TextPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract Purpose: Few studies have evaluated the effect of radiofrequency thermal ablation on renal tissue, although it has been used clinically to treat small renal masses. We studied the size and histology of lesions created with radiofrequency thermal ablation administered via the laparoscopic approach with and without hilar occlusion in a porcine model. Materials and Methods: The lower pole of each kidney was exposed laparoscopically in 11 farm pigs. In each kidney a 7-electrode dry radiofrequency thermal ablation probe was inserted at an identical location and deployed to a diameter of 2 cm. Energy was applied for 8 minutes at an average temperature of 100C. The left renal hilum of each pig was clamped during radiofrequency thermal ablation. Two pigs were sacrificed immediately, and 3 each were sacrificed at 24 hours, 2 and 4 weeks. The size and shape of the lesions created were measured and examined histologically. Results: There were no intraoperative or postoperative complications. Laparoscopic ultrasound confirmed probe placement but did not monitor lesion progression. Acutely lesions were firm and white with a small adjacent hemorrhagic zone. Histological evaluation revealed preserved renal architecture but the loss of distinct cytoplasmic features. Nicotinamide adenine dinucleotide staining demonstrated no viable cells within the lesions. In surviving animals pelvicaliceal integrity was preserved. In the 2 and 4-week survival groups kidneys treated with hilar occlusion had larger lesions than nonoccluded kidneys but the differences were not significant at 4 weeks (3.2 × 2.7 × 2.5 cm. and 3.5 × 1.7 × 2.0, respectively, p >0.05). Histologically untreated parenchyma of hilar occluded kidneys demonstrated changes consistent with chronic pyelonephritis. In 1 kidney radiofrequency thermal ablation with hilar occlusion resulted in complete lower pole loss at 4 weeks. Conclusions: In the porcine model renal radiofrequency thermal ablation creates rapid and completely devitalized lesions of consistent size and shape. Hilar occlusion may result in slightly larger lesions but risks damage to the whole renal unit. References 1 : Laparoscopic renal cryoablation: initial clinical series. Urology1998; 52: 543. Google Scholar 2 : Radio frequency interstitial tumor ablation (RITA) is a possible new modality for the treatment of renal cancer: ex vivo and in vivo experience. J Endourol1997; 11: 251. Google Scholar 3 : Radio frequency ablation of renal cell carcinoma via image guided needle electrodes. J Urol1999; 161: 599. 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Urology2000; 56: 197. Google Scholar 10 : Radiofrequency ablation of the kidney: acute and chronic histology in porcine model. Urology2000; 56: 872. Google Scholar 11 : Radiofrequency ablation lesions in a pig liver model. J Surg Res1999; 87: 114. Google Scholar 12 : A phase 2 study of radio frequency interstitial tissue ablation of localized renal tumors. J Urol2000; 163: 1424. Link, Google Scholar From the Departments of Urology and Pathology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas© 2001 by American Urological Association, Inc.FiguresReferencesRelatedDetailsCited ByStern J, Anderson J, Lotan Y, Park S and Cadeddu J (2018) Nicotinamide Adenine Dinucleotide Staining Immediately Following Radio Frequency Ablation of Renal Tumors—Is a Positive Stain Synonymous With Ablative Failure?Journal of Urology, VOL. 176, NO. 5, (1969-1972), Online publication date: 1-Nov-2006.MARGULIS V, MATSUMOTO E, TAYLOR G, SHAFFER S, KABBANI W and CADEDDU J (2018) RETROGRADE RENAL COOLING DURING RADIO FREQUENCY ABLATION TO PROTECT FROM RENAL COLLECTING SYSTEM INJURYJournal of Urology, VOL. 174, NO. 1, (350-352), Online publication date: 1-Jul-2005.TAN B, EL-HAKIM A, MORGENSTERN N, SEMERDZHIEV Y, SMITH A and LEE B (2018) COMPARISON OF LAPAROSCOPIC SALINE INFUSED TO DRY RADIO FREQUENCY ABLATION OF RENAL TISSUE: EVOLUTION OF HISTOLOGICAL INFARCT IN THE PORCINE MODELJournal of Urology, VOL. 172, NO. 5, (2007-2012), Online publication date: 1-Nov-2004.JACOMIDES L, OGAN K, WATUMULL L and CADEDDU J (2018) Laparoscopic Application Of Radio Frequency Energy Enables In Situ Renal Tumor Ablation And Partial NephrectomyJournal of Urology, VOL. 169, NO. 1, (49-53), Online publication date: 1-Jan-2003.MARCOVICH R, ALDANA J, MORGENSTERN N, JACOBSON A, SMITH A and LEE B (2018) Optimal Lesion Assessment Following Acute Radio Frequency Ablation of Porcine Kidney: Cellular Viability or Histopathology?Journal of Urology, VOL. 170, NO. 4 Part 1, (1370-1374), Online publication date: 1-Oct-2003.MICHAELS M, RHEE H, MOURTZINOS A, SUMMERHAYES I, SILVERMAN M and LIBERTINO J (2018) Incomplete Renal Tumor Destruction Using Radio Frequency Interstitial AblationJournal of Urology, VOL. 168, NO. 6, (2406-2410), Online publication date: 1-Dec-2002.Rehman J, Landman J and Sundaram C (2018) RE: THE UNCERTAINTY OF RADIO FREQUENCY TREATMENT OF RENAL CELL CARCINOMA: FINDINGS AT IMMEDIATE AND DELAYED NEPHRECTOMYJournal of Urology, VOL. 168, NO. 5, (2128-2129), Online publication date: 1-Nov-2002.Ogan K, Cadeddu J and Sagalowsky A (2018) Radio Frequency Ablation Induced Acute Renal FailureJournal of Urology, VOL. 168, NO. 1, (186-186), Online publication date: 1-Jul-2002. Volume 166Issue 1July 2001Page: 281-284 Advertisement Copyright & Permissions© 2001 by American Urological Association, Inc.Keywordscatheter ablationlaparoscopykidneyswineMetricsAuthor Information T. Spark Corwin More articles by this author Guy Lindberg More articles by this author Olivier Traxer More articles by this author Matthew T. Gettman More articles by this author Thomas G. Smith More articles by this author Margaret S. Pearle More articles by this author Jeffrey A. Cadeddu More articles by this author Expand All Advertisement PDF DownloadLoading ..." @default.
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