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Three-in-Five Competition

Wednesday, April 17, 8:00-10:00
Meridian Ballrooms 2/3, Graduate Minneapolis

Competition Chairs: Randy Schiestl, VP, R&D, Global Technology, Boston Scientific Corporation
Paul Rothweiler, Prototyping & Materials, Earl E. Bakken Medical Devices Center

2019 Three-in-Five Grand Prize Winner Emily Hein

"Design of a Folding-Frame Ergonomic Wheelchair" (DMD2019-3227)
Emily Hein, University of Minnesota

This project was seeking to improve on a previously completed manual wheelchair with an ergonomic drive system. The goals for improvement were decreasing weight and using a folding frame for increased accessibility. The new design was completed by using a frame from a commercially available wheelchair and adapting it to house an ergonomic drive system. During the design process, customer preference feedback was gathered from veterans to inform the design. The finished prototype is currently in the process of being licensed by a manufacturing partner.


2019 Three-in-Five 2nd Place Winner Narendran Narasimhan2nd Place Winner

"A Simple Manual Roller Wheel Insertion Tool for Electrode Array Insertion in Minimally Invasive Cochlear Implant Surgery" (DMD2019-3249)
Narendran Narasimhan, Vanderbilt University

Image-guided, minimally-invasive cochlear implant surgery is a novel “keyhole” surgical approach for placing a cochlear implant electrode array eliminating the need for a wide-field mastoidectomy approach. Image guidance is used for path planning which is followed by the construction of a customized micro-stereotactic frame to drill a narrow channel from the skull surface to the cochlea. Herein, we present an insertion tool that uses roller wheels to advance the electrode array through the narrow tunnel and into the cochlea. Testing in a phantom revealed that when compared to insertions with surgical forceps, the new insertion tool was on average 26s faster, produced complete insertions more often (i.e. in 6/6 trials, vs. 1/6), and reduced array buckling (0/6 trials vs. 5/6). The tool provides a viable solution to complete the last step of this novel, minimallyinvasive procedure. It also provides the advantage over previously developed manual insertion tools of enabling the surgeon to blindly actuate the roller wheel tool to advance the electrode into the tunnel. This allows the surgeon to visualize and guide insertion into the cochlea from a more advantageous visual perspective.

2019 Three-in-Five 3rd Place Winner Ankit Saxena3rd Place Winner

"Novel Inverted Tubular Design for Improved Endoscope Positioning" (DMD2019-3294)
Ankit Saxena, Penn State University

To detect and treat colorectal cancers endoscopes are commonly used to perform colonoscopies, with an estimated 15 million performed in America every year. Endoscope designs rely on physicians physically pushing the long device into position through the intestine thereupon applying potentially damaging forces to the intestinal wall. To improve endoscopic procedures this paper resents the novel concept of Inverted Tubular Element Locomotion (ITEL) to reduce interaction forces between the endoscope and the intestine wall. Experiments are performed that demonstrate functionality of the tubular design and less than 3.5 kPa to deploy. The tube material thickness has a linear relationship with the force required. This unique design has the potential to enhance patient safety and to improve procedural efficiency.

Panel Judges:

Stephanie Board, Abbott

John Deedrick, Fourth Element Capital

Pamela Goldberg, MDIC

Paul Hindrichs, ActiveOrtho

Pinar Karaca-Mandic, University of Minnesota

Del Lawson, 3M Medical Solutions Division

Michael O’Connor, Medtronic



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