Roger D. Demaree

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This paper presents a radiological guidance method and robotic system designed to facilitate renal surgical procedures. Combines the guidance procedure normally employed by practicing surgeons with a simple and cost-effective needle injection device. The needle injector exhibits an extremely low radiological profile while providing actuated needle motion.(More)
This paper presents a simple radiologicd image guidance method and robotic system optimized for percutaneous procedures. This simplicity is achieved by combining the proven guidance procedure normally employed by practicing surgeons with a simple and cost-effective needle injection device. The needle injector exhibits an extremely low radiological profile(More)
Laparoscopic instrumentation is constantly being refined in an attempt to achieve the proficiency, flexibility, and tactile feedback that would be available if the human hand were small enough to be used in laparoscopic surgery. The EndoHand (DAUM GmbH, Schwerin, Germany) is a novel laparoscopic three-fingered hand developed as an advancement over standard(More)
There has been recent interest in using balloon dilation to create an extraperitoneal working space to perform retroperitoneoscopy. Balloon dilation is not without risk, and incorrect placement or rupture can result in tissue damage. We developed an ex vivo model to assess the effect of various filling media on tissue injury during balloon rupture. As would(More)
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