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July 8, 2008

Students create groundbreaking biomedical devices

Students who worked with WakeMed presented their projects in April at the hospital. These students designed a voice-activated nurse call device. (Photo courtesy of WakeMed)

Not all of the inventions produced in NC State’s biomedical engineering program were created by veteran researchers with PhDs.

Many of the inventors are undergraduates, and their creations could become commonplace in clinics and hospitals all over the world. The top-notch students of the Joint NC State-UNC Department of Biomedical Engineering (BME) continue to break ground in this relatively new field.

"It was just really interesting to see how many different research opportunities are available (in biomedical engineering) because we don’t know so much about it," said Sneha Rangarao, a biomedical engineering major who helped invent a super-absorbent floor mat. "It’s a growing field."

From left: Carlos Kengla, Cara Buchanan, Jennifer Chan and Sneha Rangarao. The group designed a super-absorbent floor mat for operating rooms. (Photo: submitted)

Rangarao and other students designed the floor mat for Senior Design, the department’s capstone undergraduate course. The students teamed up to work on the projects, gleaning ideas from local hospitals that had problems that needed solving. This year’s NC State senior design group saw teams working with WakeMed, Rex-UNC Health Care and NC State’s College of Veterinary Medicine and Department of Mechanical and Aerospace Engineering.

Projects are derived by students using a process involving an assessment of real clinical needs. Andrew DiMeo, the senior design instructor, believes this process helps "lead to the prolific invention disclosures we submit from this course." This year’s senior design group has produced 10 invention disclosures, up from seven last year.

Andrew DiMeo is the senior design instructor for NC State's biomedical engineering program. (Photo courtesy of WakeMed)

DiMeo, director of industrial relations for the department, brings his own experiences to the course. He had been a graduate student in BME at UNC before taking a leave of absence to start a family. He entered the private sector, work that included time at Alaris Medical Systems and Gilero, a service company he co-founded that specializes in high-volume medical devices. He also founded the North Carolina Medical Device Organization, a nonprofit with a mission to make the state’s medical device and diagnostic industry a world leader in research, development and production.

DiMeo stayed close to NC State, serving on the Board of Advisors to the Undergraduate BME program and befriending Dr. Frank Abrams, who ran the senior design course at the time.

When Abrams retired a few years ago, the department was looking for someone with real-world experience and industry connections to lead the course. DiMeo was a natural fit.

Several of the projects DiMeo has shepherded through senior design show great promise to enter clinics. Among them are a fluid control system for patient simulators and a positioning device that allows X-Rays to show the appropriate part of a patient’s leg without interference or patient discomfort.

Rangarao’s team got its idea by observing operating rooms at WakeMed.

When team members spoke with doctors about the various challenges they faced, the students found that the risk of blood, saline solution and other fluids falling to the floor created safety hazards during surgeries. The current method of cleaning it up was to put a bunch of rags on the floor, she said.

"We needed something to absorb fluid. Something that’s easy to use and something that’s disposable," she said. "And something that’s inexpensive, of course."

Students showcased their work for biomedical industry professionals at a symposium in Research Triangle Park. (Photo submitted)

So Rangarao and the rest of her team designed a floor mat. It’s disposable and made of several materials that absorb all the fluid immediately.

Like other senior design projects, the invention appears to have a future in operating rooms. A couple of investors who have seen the mat liked what they saw.

"There is an interest in it," she said. "Definitely."

-degraff-



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