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Partial nephrectomy using radiofrequency incremental bipolar generator with multi electrode probe: experimental study

Piero Rossi1, Pierluigi Bove, Mauro Montuori

  • 1Department of General Surgery, University Hospital of Tor Vergata, Rome, Italy. Piero.rossi.box@alice.it.

BMC Urology
|January 14, 2014
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Summary

This study developed a new radiofrequency generator for kidney surgery, enabling precise tissue coagulation without vessel clamping. Optimal settings achieved homogeneous coagulation, reducing charring and allowing immediate stitching.

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Area of Science:

  • Urology
  • Surgical Technology
  • Biomedical Engineering

Background:

  • Developing innovative surgical tools is crucial for improving patient outcomes.
  • Partial renal resection traditionally involves vessel clamping, increasing risks.
  • Radiofrequency (RF) technology offers potential for precise tissue ablation and coagulation.

Purpose of the Study:

  • To develop and test an incremental bipolar radiofrequency generator with a specialized probe for renal parenchyma resection.
  • To achieve effective coagulation along the resection line without clamping renal vessels.

Main Methods:

  • Phase 1: Design and creation of the RF generator and a 4-electrode inline probe for open surgery.
  • Phase 2: System testing on 27 ex vivo kidneys, performing 47 partial resections.
  • Evaluation of parameters including power, coagulation time, needle size, tissue charring, and stitch feasibility.

Main Results:

  • Optimal coagulation achieved using 1.5 mm needles at power level 5.
  • Recommended coagulation times: 54 seconds for initial insertion, 30 seconds for subsequent insertions.
  • Homogeneous coagulation thickness and minimal charring were observed.

Conclusions:

  • The "LaparoNewPro" generator and probe effectively coagulate renal parenchyma during resection.
  • The system provides homogeneous coagulation in short times without charring.
  • The generator's automated current control ensures reliable energy delivery and optimal coagulation cessation.