Julien Renard

Learn More
OBJECTIVE Laparoscopic partial nephrectomy (LPN) is a technique that is emerging as an attractive option for the treatment of renal tumors <or=4 cm. We retrospectively analyzed our experience with LPN to identify patient and tumor features that correlate with a higher risk of complications. MATERIAL AND METHODS From January 2001 to May 2007, 90 patients(More)
BACKGROUND AND PURPOSE Laparoscopic radical cystectomy is confined to centers where advanced laparoscopy is performed, and its role is not yet well clear. Our aim was to evaluate, through a prospective comparative study, the advantages of the laparoscopic compared with an open approach. PATIENTS AND METHODS From November 2002 to December 2005, all the(More)
OBJECTIVES To assess the clinical role of corticosteroids in the medical expulsive therapy of symptomatic distal ureteral stones. METHODS Between January 2004 and September 2005, 114 patients with symptomatic distal ureteral stones with a >/=5mm diameter were enrolled in this prospective study and divided into four groups based on the urologist (of four)(More)
OBJECTIVES To evaluate, in a pilot prospective randomized trial, the safety, effectiveness and radiological recurrence of retroperitoneal renal cyst decortication compared with retroperitoneal decortication with wadding using perirenal pedicled fat tissue. PATIENTS AND METHODS From March 2004 to December 2007, 40 patients with simple renal cysts were(More)
We present an experimental study of nonlocal electrical signals near the Dirac point in graphene. The in-plane magnetic field dependence of the nonlocal signal confirms the role of spin in this effect, as expected from recent predictions of the Zeeman spin Hall effect in graphene, but our experiments show that thermo-magneto-electric effects also contribute(More)
OBJECTIVE To demonstrate the safety of the Millin extraperitoneal laparoscopic adenomectomy by comparing the laparoscopic and open approaches. METHODS From January 2003 to April 2005, patients, with indication of prostatic adenomectomy, were offered the chance to choose between 2 types of procedure: Millin adenomectomy with open or extraperitoneal(More)
OBJECTIVE To evaluate renal damage and impairment of renal function 1 yr after laparoscopic partial nephrectomy (LPN) with warm ischemia >30 min. METHODS From July 2004 to June 2005, 18 patients underwent LPN with warm ischemia time >30 min. Kidney damage markers (daily proteinuria and tubular enzymes) and renal function (serum creatinine, cystatin C, and(More)
OBJECTIVE • To assess the residual power delivered at the tip of a high-power (80 W) potassium-titanyl-phosphate (KTP) laser (80 W Green Light PV(TM), Laserscope(®); American Medical Systems, Minnetonka, MN, USA) at the end of a photoselective vaporization of the prostate (PVP) procedure, as well as the deflection angle of the laser beam. MATERIALS AND(More)
A principal motivation to develop graphene for future devices has been its promise for quantum spintronics. Hyperfine and spin-orbit interactions are expected to be negligible in single-layer graphene. Spin transport experiments, on the other hand, show that graphene's spin relaxation is orders of magnitude faster than predicted. We present a quantum(More)
Scanning tunneling microscopy (STM) at liquid helium temperature is used to image potassium adsorbed on graphite at low coverage (≈0.02 monolayer). Single atoms appear as protrusions on STM topographs. A statistical analysis of the position of the atoms demonstrates repulsion between adsorbates, which is quantified by comparison with molecular dynamics(More)