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Student Researchers Developing Realistic Prosthetic Finger

Posted 03/12/2014
Posted by Meagan Fazio

Casey Beasley M'15 and Assistant Professor Michael Wininger work on a design for a prosthetic finger.

We use our hands so often during the day, it’s easy to take for granted just how complex our fingers are. Graduate students in the University of Hartford's prosthetics and orthotics program understand these complicated mechanics. Now one of them is using her knowledge to develop what she hopes will be the most realistic prosthetic finger on the market.

While observing patients’ use of prosthetic hands, Casey Beasley M’15 noticed there was much room for improvement so she decided to create a new finger for her University Honors project. Under the guidance of Assistant Professor Michael Wininger from the University's College of Education, Nursing and Health Professions, Beasley spent last summer and fall developing 12 working prototypes. There are a few factors that make her design so unique.

The prototype, known as a biomimetic finger because it mimics the function and structure of a natural finger, includes a “fat pad simulant.” Beasley says this pad “takes on a key characteristic of the natural human grasp: a sort of soft tissue compliance that aids our fingers in securely grasping many objects.”

A prototype of a prosthetic finger designed by Casey Beasley '15.

The other feature involves the phalangeal segments, or bones, of the finger. Beasley’s creation uses continuously adjustable phalangeal segments so there is a more customized fit for the patient while still making it possible to mass-manufacture the fingers.

This spring, three of Beasley’s classmates joined the project. They are Derek Becker M’15, Joseph Cassella M’15, and Stephen Sousa M’16. Each student brings their own perspective and expertise, and all are focused on expanding the finger design to a complete hand prototype. A $9,300 grant from the University of Hartford's Women's Education and Leadership Fund (WELFund) will help with the next step, which is to send the best prototype out for machining and then develop the electronics to make it work. Beasley also received a Connecticut Space Grant Consortium Student Project Grant award.

Beasley says she was comfortable with science in high school, but also enjoyed art. When it came time to start thinking about college, she began looking for a way to combine her interests. “I looked at a lot of areas and one that stood out for me was prosthetics and orthotics. And when I started looking into schools, the University of Hartford became an obvious choice.”

The University of Hartford is one of just nine schools in the country that offer a Master of Science in Prosthetics and Orthotics. In February, U.S. Senator Richard Blumenthal (D-Conn.) came to campus to announce that he was co-sponsoring a bill, part of which would provide grants to colleges and universities to develop more technologically advanced prosthetics. The large bill did not receive Senate approval in March, but the segment on prosthetics may resurface in the future. Beasley’s project was featured in WTIC’s coverage of Blumenthal’s visit.