Sutureless Laparoscopic Heminephrectomy: Safety and Efficacy in Physiologic and Chronically Obstructed Porcine Kidney

Abstract

We sought to develop and examine the feasibility and efficacy of a streamlined sutureless system of repairing parenchymal and collecting system defects using BioGlue (bovine albumin-glutaraldehyde adhesive) and ProPatch (bovine pericardial patch) in swine under physiological conditions and mechanical stress imposed by chronic ureteral obstruction caused by complete ureteral transaction. Five pigs (10 kidneys) underwent left-side transperitoneal laparoscopic heminephrectomy, followed 2 weeks later by right-sided heminephrectomy with complete ureteral transaction (between clips) to provide a mechanical stressor on the repair, followed 2 weeks later by euthanasia. In each case, after hilar clamping, the lower pole was removed with a bipolar dissector. Hemostasis was obtained with argon beam coagulator and FloSeal (thrombin-gelatin matrix), followed by sutureless repair (ProPatch-BioGlue “sandwich”). At euthanasia, harvested kidneys underwent ex vivo retrograde-pyelography and pathological examination to rule out urinoma/perinephric fluid collection and determine collecting system/parenchymal healing. Mean operative time was 77.8 minutes. Mean warm ischemia time was 12.3 ± 5.6 minutes. Estimated blood loss was 49.5 ± 39.0 mL. All animals demonstrated immediate hemostasis on hilar clamp release. Pyelography failed to demonstrate any collecting system leakage, and closure and healing was confirmed in all. Four of 5 pigs had intact renal function at euthanasia. Two pigs were euthanized for causes unrelated to procedures 4 days prior to study end. This study provides proof of principle that sutureless laparoscopic heminephrectomy is effective in physiological and chronic obstruction conditions in the porcine model. The procedure is reproducible, and resection/renorrhaphy was completed on average with approximately 12 minutes warm ischemia time.

Keywords

laparoscopy partial nephrectomy hydro-nephrosis porcine renorrhaphy collecting system thrombin-gelatin matrix albumin-glutaraldehyde bovine pericardium

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