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J Endourol. 2011 Jun;25(6):1005-11. doi: 10.1089/end.2010.0557. Epub 2011 May 19.

Single instrument for hemostatic control in laparoscopic partial nephrectomy in a porcine model without renal vascular clamping.

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Department of Urology, Hospital Clínico Universitario Lozano Blesa, Zaragoza, Spain.



To test the viability of a new device to obtain hemostasis during laparoscopic partial nephrectomy (LPN) without vascular clamping.


We performed a comparative experimental study between a new radiofrequency (RF)-assisted device consisting of a handheld instrument that simultaneously conducts coagulation and cutting tasks without hilar clamping vs a standard technique with hilar clamping. A porcine model was used (10 animals per group) with survival of 17 days.


The estimated blood loss with the new device was significantly lower than with the standard technique (15.5±23.7 vs 79.4±76.3  mL). Although transection time was longer with the new device (10.7±13.7 vs 2.1±1.2  min), the total operative time was significantly shorter (35.3±13.7 vs 60.2±10.5  min). Evidence of localized urinary extravasation (urinoma) was identical in both groups (five cases). The group subjected to the new device, however, showed a significantly higher number of cases of leakage after conducting the methylene-blue test: eight (80%) cases vs only one (11%) with the standard technique. Necrosis depth was significantly greater with the new device (6.6±0.9 vs <1  mm).


The experimental results suggest that the proposed RF-assisted device provides adequate hemostatic control during transection of the renal parenchyma without additional instruments or surgical maneuvers and could therefore be a valuable adjunct for LPN without vascular clamping. The device was unsuccessful in effectively sealing the collecting system.

[Indexed for MEDLINE]

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