Cervando Gerardo Ortiz-Vanderdys

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OBJECTIVE To investigate the relationship between multiple cryoprobes was investigated to determine whether they work in an additive or synergistic fashion in an in vivo animal model because 1.47 mm (17-gauge) cryoprobes have been introduced to the armamentarium for renal cryotherapy. METHODS Laparoscopic-guided percutaneous cryoablation was performed in(More)
PURPOSE Tisseel® is used to control minor bleeding during laparoscopic procedures. The DuploSpray MIS™ spray system allows thin, even application over a larger surface area. We use sprayed Tisseel as the sole agent to control hemorrhage and seal the renal collecting system after severe porcine laparoscopic partial nephrectomy. METHODS AND MATERIALS We(More)
PURPOSE Preoperative planning for renal cryotherapy is based on isotherms established in gel. We replicated gel isotherms and correlated them with ex vivo and in vivo isotherms in a porcine model. MATERIALS AND METHODS PERC-17 CryoProbes (1.7 mm) and IceRods (1.47 mm) underwent trials in gel, ex vivo and in vivo porcine kidneys. Temperatures were recorded(More)
PURPOSE Pneumoperitoneum is known to decrease blood flow to the kidney during laparoscopy. We investigated if this change in blood flow would increase the size of the cryolesion. MATERIALS AND METHODS Twelve Yorkshire swine underwent laparoscopy-guided percutaneous cryoablation of the upper and lower pole of each kidney at four randomized pneumoperitoneum(More)
PURPOSE To our knowledge the optimal freeze cycle length in renal cryotherapy is unknown. Ten-minute time based freeze cycles were compared to temperature based freeze cycles to -20C. MATERIALS AND METHODS Laparoscopic renal cryotherapy was performed on 16 swine. Time based trials consisted of a double 10-minute freeze separated by a 5-minute thaw.(More)
OBJECTIVE The flow characteristics, ureteral conformance, and histopathologic changes of a novel spiral cut flexible ureteral stent (Percuflex Helical, Boston Scientific, Boston, MA) were evaluated in vivo in an acute and chronic porcine model. MATERIALS AND METHODS Flow characteristics and ureteral conformance of the novel stent were determined in 6(More)
OBJECTIVE To demonstrate the formation of fractures due to cryoablative therapy in a controlled model and validate the new model for the study of the complication of fractures during renal cryoablation. METHODS Endocare PERC-17 (1.7 mm) and Galil 17 ga IceRod (1.47 mm) probes were selected because of similar diameter and reported ice-ball size. The ex(More)
Objective To demonstrate a benefit in diminished adverse events such as hypotension and hematuria with gradual drainage of the bladder when compared to rapid decompression in patients with acute urinary retention (AUR) due to benign prostatic hyperplasia in a case-control study. Methods Sixty-two patients matched our selection criteria presenting with(More)
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