title: InLine bipolar radiofrequency ablation device-assisted partial nephrectomy in a porcine model.
abstract: BACKGROUND
  Nephron-sparing surgery has become an acceptable alternative to radical nephrectomy in the treatment of renal tumours. Control of intraoperative blood loss can be an important challenge during partial nephrectomy. InLine radiofrequency ablation (ILRFA) device has shown promising results of significant reduction of intraoperative blood loss in liver resection. In this study, we tested ILRFA-assisted partial nephrectomy in a porcine model.
  
  
  METHODS
  Eight landrace pigs were used in this study. Every pig underwent 2-3 partial nephrectomies. The proposed line of parenchymal incision was circumferentially scored with a diathermy. Then, ILRFA was deployed into this resection plane. After complete coagulation, the resection was then simply carried out using the scalpel. For the control resection, we used diathermy to transect the other pole, further sutures were then used to secure the residual bleeding.
  
  
  RESULTS
  The ILRFA deployments were set to 3 cm power algorithm. The average radiofrequency ablation coagulation time was 5 min. The mean intraoperative blood loss 35 +/- 7 mL in the ILRFA and 152 +/- 94 mL in the control, a 77.0% reduction (P = 0.024). The mean blood loss per centimetre of resection area was 2.09 +/- 1.41 mL/cm(2) in the ILRFA compared with 12.79 +/- 1.68 mL/cm(2) in controls; the reduction was 79.0% (P = 0.019).
  
  
  CONCLUSIONS
  Our study indicates that ILRFA for partial nephrectomy in a porcine model is effective in reducing blood loss. Precoagulation before parenchymal transection appears to be a valid concept in nephron-sparing surgery.
authors.affiliation: Department of Surgery, University of New South Wales, St George Hospital, New South Wales, Australia.
authors.forename: Peng
authors.initials: P
authors.lastname: Yao
authors.forename: Aravin
authors.initials: A
authors.lastname: Gunasegaram
authors.forename: Leigh A
authors.initials: LA
authors.lastname: Ladd
authors.forename: David L
authors.initials: DL
authors.lastname: Morris
mesh_terms: D000818:Animals; D016063:Blood Loss, Surgical / Q000517:prevention & control*; D017115:Catheter Ablation / Q000295:instrumentation*; D006488:Hemostasis, Surgical / Q000295:instrumentation*; D009392:Nephrectomy / Q000379:methods*; D013552:Swine