Chandru P. Sundaram

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PURPOSE We assessed the usefulness of the LigaSure (Valleylab, Boulder, Colorado) vessel sealing system for vascular control during laparoscopic surgery and compared it with other available hemostatic modalities. MATERIALS AND METHODS A total of 31 domestic pigs were divided into 5 groups. In groups 1 and 2 the vessel sealing system was compared with(More)
OBJECTIVE The objective of our study was to assess the value of diffusion-weighted imaging in differentiating among the various subgroups of renal masses. MATERIALS AND METHODS This retrospective study measured the apparent diffusion coefficients (ADCs) of renal masses. Malignant lesions were confirmed with surgical pathology results. Benign cystic(More)
PURPOSE We compared the efficacy of shock wave lithotripsy and ureteroscopy for treatment of distal ureteral calculi. MATERIALS AND METHODS A total of 64 patients with solitary, radiopaque distal ureteral calculi 15 mm. or less in largest diameter were randomized to treatment with shock wave lithotripsy (32) using an HM3 lithotriptor (Dornier MedTech,(More)
OBJECTIVES To report an initial clinical urologic experience using single-port surgery compared to the traditional laparoscopic technique for nephrectomy. METHODS A total of 11 patients underwent laparoscopic nephrectomy using the laparoendoscopic single-site surgery (LESS) procedure, with 1 R-port used for each. A group of 10 patients who previously(More)
394 Background: Laparoscopic and robotic partial nephrectomy (LPN and RPN) are increasingly common minimally invasive alternatives to open partial nephrectomy (OPN) for management of renal tumors. The cost discrepancies of these approaches warrants evaluation. We compared hospital costs associated with RPN, LPN, and OPN. METHODS Variable hospital costs(More)
BACKGROUND AND PURPOSE The effect of stents on ureteral peristalsis in vivo is not entirely clear. We sought to develop a minimally invasive method for its study. MATERIALS AND METHODS In female domestic pigs, electrical potentials from the ureter were measured by bipolar steel-wire electromyography electrodes delivered laparoscopically. Mechanical(More)
PURPOSE The primary objective of this study is to determine if training on the Mimic dV-Trainer (MdVT) simulator results in improved ability on the da Vinci surgical system (dVSS) using exercises with inanimate objects. MATERIALS AND METHODS Twelve trainees (MdVT group) and 10 residents and one fellow (dVSS group) were recruited for the study. Each(More)
PURPOSE With the exponential growth of robotic urological surgery, particularly with robot assisted radical prostatectomy, guidelines for safe initiation of this technology are a necessity. Currently no standardized credentialing system exists to our knowledge to evaluate surgeon competency and safety with robotic urological surgery performance. Although(More)
OBJECTIVES To evaluate the impact of the ureteral access sheath on intrarenal pressures during flexible ureteroscopy in light of the recent resurgence in their use. As such, using human cadaveric kidneys, we studied changes in intrarenal pressure in response to continuous irrigation at different pressures with and without access sheaths of various sizes and(More)
OBJECTIVES During the preoperative evaluation of potential kidney donors, the increased sensitivity of spiral computed tomography (CT) could detect more asymptomatic small (less than 4 mm) renal calculi. However, whether these stones will be of consequence later has yet to be determined. We evaluated the rate of spontaneous passage, development of symptoms,(More)