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Pure "cable-tie partial nephrectomy": a porcine model.

Ofer N Gofrit¹, Miki Harlev, Shilo Rosenberg

¹Department of Urology, Hadassah Hebrew University Hospital, P.O. Box 12000, 91120, Jerusalem, Israel. ogofrit@gmail.com

Surgical Endoscopy

|May 7, 2010

Summary

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A novel technique using a plastic cable tie for polar nephrectomy in pigs proved simple, rapid, and bloodless. This "cable-tie partial nephrectomy" avoids renal ischemia and may offer a new approach for tumor removal.

Area of Science:

Urology
Surgical Innovation
Animal Models

Background:

Standard nephron-sparing surgery for polar renal tumors is technically demanding, involving hilar clamping and warm kidney ischemia.
Laparoscopic techniques are common but challenging.

Purpose of the Study:

To assess the feasibility of polar nephrectomy using a cable tie without hilar clamping or hemostasis.
To evaluate a novel, simplified approach to partial nephrectomy.

Main Methods:

Four pigs underwent laparoscopic polar nephrectomy using a plastic cable tie to encircle and transect a kidney pole.
No tissue sealants or energy devices were used.
Animals were observed for 3 weeks post-surgery.

Main Results:

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The procedure was technically easy, rapid (<12 minutes), and associated with minimal blood loss (<30 ml).
Postoperative recovery was uneventful, with no observed abnormalities at 3 weeks.
Histological examination showed localized necrosis under the cable tie.

Conclusions:

Polar nephrectomy with a cable tie is a feasible, cost-effective, and rapid method in a porcine model.
This technique avoids hilar dissection and renal ischemia, eliminating the need for renal reconstruction.
"Cable-tie partial nephrectomy" presents a potential new surgical option for renal tumors.