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Worcester Polytechnic Institute Students Create First-of-Its Kind Prosthetic Flipper for Maimed Sea Turtle
  • USA - English


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Worcester Polytechnic Institute

Sep 14, 2016, 15:00 ET

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Worcester Polytechnic Institute’s Iok Wong and Samantha Varela help Key West Aquarium’s Douglas Mader and Greg Gerwin fit a prosthetic flipper on Lola, a rare sea turtle. Photo credit-Rob O’Neal
Worcester Polytechnic Institute’s Iok Wong and Samantha Varela help Key West Aquarium’s Douglas Mader and Greg Gerwin fit a prosthetic flipper on Lola, a rare sea turtle. Photo credit-Rob O’Neal
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Worcester, Mass. (PRWEB) September 14, 2016 -- Applying engineering know-how to turtle biomechanics, a team of WPI engineering students developed the first ever hydrodynamic biomimetic prosthetic fin using inexpensive 3-D printing, that may help save injured Kemp’s ridley sea turtles, the rarest sea turtle species in the world. The students’ work with Key West Aquarium focused on Lola, a turtle whose right flipper had to be amputated after it became entangled in fishing gear. The team hopes that rescue centers will emulate their design to help similarly injured sea turtles.

“Flipper damage is the most common injury in sea turtles and, unfortunately, we see it all the time,” said Douglas Mader, DVM, a veterinarian at Key West Aquarium. “But with the technology the WPI students developed, this new flipper design will allow this sea turtle, Lola, and other injured turtles to be rehabilitated and live a more normal life. That’s important for the species, especially when the injured turtle is of breeding age.”

Kemp’s ridley sea turtles are critically endangered: there are believed to be as few as 1,000 breeding females remaining in the world. The turtles have an average life span of 50 years in the wild and are found primarily in the Gulf of Mexico. Injuries occur when the animals are entangled in fishing gear, hit by boats, or attacked by sharks or other predators. Maimed turtles are often unable to swim and thus, unless rescued, are unlikely to survive long in the wild. Even among those that are rescued, severe injuries, especially a loss of more than one flipper, sometimes require humane euthanization.

Lola was discovered stranded in 2002 in the Gulf of Mexico with fishing line wrapped around her front right flipper. She was rehabilitated at a rescue center for 11 months, and released into the Gulf of Mexico; however, she was stranded again two days later. Several rescue centers and aquariums took care of her before she was settled at Key West Aquarium in 2007.

WPI students Iok Wong, Samantha Varela, and Vivian Liang contacted the Key West Aquarium last year while researching their senior capstone project, or Major Qualifying Project (MQP), an intensive, yearlong team project required of all WPI seniors. Through the MQP, students demonstrate the application of the skills, methods, and knowledge of their discipline to the solution of a specific problem. Students work with faculty and advisors to identify, select, and manage their projects, which are conducted at WPI’s more than 40 project centers around the world. The team’s advisors were mechanical engineering professors Brian Savilonis and Yuxiang Liu.

For their project, Wong, Varela, and Liang designed flipper to imitate Lola’s healthy limb. They considered various shapes and fabricated several using low-cost silicone and a 3-D printer, and tested them in a wind tunnel. Each student brought his or her own particular skill to the project: Wong, a mechanical engineering major and aerospace engineering minor, perfected the hydrodynamics of the flipper; Varela, a biomedical engineering major, designed a way to attach the prosthetic; and Liang, a double major in biomedical engineering and mechanical engineering, ensured that the design and attachment of the flipper would allow Lola to generate enough force to swim.

This prosthetic design is the only one like it in the world because it is biomimetic, made to fit Lola and mimicking the way her healthy flipper moves.

Last week, Wong and Varela traveled to Key West to fit Lola with her new flipper. Mader and Greg Gerwin, curator at Key West Aquarium, noted that Lola adapted to the flipper almost immediately, swimming swiftly and smoothly.
Said Gerwin, “With her flipper missing, Lola would only swim in circles, which caused her a lot of discomfort during feeding. And it was sad to watch her not moving around much or just sitting at the bottom of the exhibit, because sea turtles normally can move so gracefully. Now, with her prosthetic, we have hope for Lola.”

“Lola is a very young sea turtle, of breeding age, but with her amputation stressing her remaining limbs, her life expectancy was shortened,” said Wong who, along with Varela and Liang, graduated in May. “Our work focused on Lola but we hope our partners at Key West Aquarium and other rescue centers will use our design to help other turtles rebound after similar injuries, which may help sustain the population of Kemp’s ridley sea turtles.”

Key West Aquarium expects to keep Lola in the sea turtle exhibit and use her prosthetic flipper to educate visitors about the plight of turtles and ways human behavior can impact wildlife. They also plan to teach visitors about the application of engineering to help sea turtles like Lola.

About Worcester Polytechnic Institute

Founded in 1865 in Worcester, Mass., WPI is one of the nation’s first engineering and technology universities. Its 14 academic departments offer more than 50 undergraduate and graduate degree programs in science, engineering, technology, business, the social sciences, and the humanities and arts, leading to bachelor’s, master’s and doctoral degrees. WPI's talented faculty work with students on interdisciplinary research that seeks solutions to important and socially relevant problems in fields as diverse as the life sciences and bioengineering, energy, information security, materials processing, and robotics. Students also have the opportunity to make a difference to communities and organizations around the world through the university's innovative Global Projects Program. There are more than 45 WPI project centers throughout the Americas, Africa, Asia-Pacific, and Europe.

Contact
Kerry O’Brien Public Relations Specialist email: kaobrien(at)wpi(dot)edu, office: 508-831-5937, cell: 774-479-109

Kerry O'Brien, Worcester Polytechnic Institute, http://www.wpi.edu, +1 (508) 831-5937, [email protected]

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At Key West Aquarium, Lola, an injured Kemp’s ridley sea turtle, is fitted with a prosthetic flipper created by Worcester Polytechnic Institute students. Photo credit: Rob O’Neal
At Key West Aquarium, Lola, an injured Kemp’s ridley sea turtle, is fitted with a prosthetic flipper created by Worcester Polytechnic Institute students. Photo credit: Rob O’Neal
At Key West Aquarium, Lola, an injured Kemp’s ridley sea turtle, is fitted with a prosthetic flipper created by Worcester Polytechnic Institute students. Photo credit: Rob O’Neal

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