Thomas S. Lendvay

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PURPOSE Since Food and Drug Administration approval of Deflux, injection therapy for vesicoureteral reflux has increased. Little data exist on the effect that injection therapy has had on the incidence of ureteral reimplantation and total vesicoureteral reflux procedures. We used the Pediatric Health Information System database to define practice trends for(More)
BACKGROUND Validating assessment tools in surgical simulation training is critical to objectively measuring skills. Most reviews do not elicit methodologies for conducting rigorous validation studies. Our study reports current methodological approaches and proposes benchmark criteria for establishing validity in surgical simulation studies. METHODS We(More)
Robotic surgery is an accepted adjunct to minimally invasive surgery, but training is restricted to console time. Virtual-reality (VR) simulation has been shown to be effective for laparoscopic training and so we seek to validate a novel VR robotic simulator. The American Urological Association (AUA) Office of Education approved this study. Subjects(More)
PURPOSE We compared the learning curve and outcomes in children undergoing robotic assisted laparoscopic pyeloplasty during the initiation of a robotic surgery program compared to the benchmark of open pyeloplasty. MATERIALS AND METHODS The records of our first consecutive 33 children undergoing robotic assisted laparoscopic pyeloplasty from 2006 to 2009(More)
BACKGROUND Laparoscopic psychomotor skills are challenging to learn and objectively evaluate. The Fundamentals of Laparoscopic Skills (FLS) program provides a popular, inexpensive, widely-studied, and reported method for evaluating basic laparoscopic skills. With an emphasis on training safety before efficiency, we present data that explore the metrics in(More)
PURPOSE Although laparoscopic pyeloplasty has gained popularity, to our knowledge no multi-institutional study has evaluated the prevalence of this approach in children. We used a multicenter database to determine trends in the treatment of congenital ureteropelvic junction obstruction. MATERIALS AND METHODS The Pediatric Health Information System(More)
OBJECTIVES Pediatric laparoscopy poses unique training challenges owing to smaller workspaces, finer sutures used, and potentially more delicate tissues that require increased surgical dexterity when compared with adult analogs. We describe the development and face validation of a pediatric pyeloplasty simulator using a low-cost laparoscopic dry-laboratory(More)
PURPOSE Tuberous sclerosis is an autosomal dominant neurocutaneous syndrome affecting multiple organ systems and demonstrating highly variable clinical manifestations. Mutations in 2 tumor suppressor genes, TSC1 and TSC2, are linked to the evolution of the hamartomatous lesions. We describe the incidence and epidemiology, variable clinical manifestations(More)
BACKGROUND Preoperative simulation warm-up has been shown to improve performance and reduce errors in novice and experienced surgeons, yet existing studies have only investigated conventional laparoscopy. We hypothesized that a brief virtual reality (VR) robotic warm-up would enhance robotic task performance and reduce errors. STUDY DESIGN In a 2-center(More)
This research represents a randomized blinded pilot study to evaluate the acceptability and validity of a da Vinci robotic virtual reality simulator platform tested during a pediatric robotic surgery post-graduate course during the annual American Urological Association meeting in June 2007. Course enrollees performed robotic skills tasks on the da Vinci(More)