Date of Award

6-2020

Document Type

Open Access

Degree Name

Bachelor of Science

Department

Bioengineering

First Advisor

Shane Cotter

Second Advisor

Sudhir Khetan

Keywords

kidney, stones, ureteroscopy, extraction device

Abstract

Every year kidney stones affect 654,000 Americans and 25% of these cases require a ureteroscopy which is performed on patients with kidney stones greater than 4 mm in the ureter. A holmium laser is used to rupture the kidney stone resulting in fragmentation of the stone. If not removed, these residual fragments can cause pain and may require a secondary procedure to remove them. The most common method for removing stone fragments is inserting a basket device through a port on the ureteroscope, encapsulating individual stone fragments, and manually removing the device. This device requires multiple insertions to remove the stone fragments resulting in a longer procedure time. Over our two term capstone project, we developed a number of innovative design solutions to avoid the capturing of stone fragments through multiple insertions of the device. Ultimately we have focused on our top design that can deploy 2 nets independently allowing multiple stones to be contained at once. Using CAD, we designed our handle for 3D printing and produced a final prototype that incorporates this handle into the overall design. This would alleviate the need to insert the device multiple times into the ureter, which is the current issue with the commonly used device. We tested our device against one of the currently used devices in a test case scenario to see whether our device does in fact successfully encapsulate and extract the stones with one insertion.

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