TMR Rewires Johnny's Bionic Arm

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When Johnny Matheny heard about TMR, he called Dr. Albert Chi right away. (KFSN)

When you picture today's bionic man, Johnny Matheny from Port Richey, Florida should come to mind. Doctors amputated his arm during cancer treatment a decade ago. After years of using traditional prosthetics, he became a pioneer of sorts, in a targeted muscle reinnervation program. TMR starts with surgery to rewire nerves in the arm, but that is only the beginning.

When Johnny Matheny heard about TMR, he called Dr. Albert Chi right away.

"I said you know this is going to help a lot of people if it works. A lot of people. And that's what I want to do; I'm paying my life forward. So I want to help as many people as I can," Matheny told Ivanhoe.

Albert Chi, MD, Medical Director of the TMR Program at Oregon Health & Science University said, "It really is like surgical rewiring of the body."

This allows patients to move prosthetics with intuitive thought.

"We take nerve endings that used to travel to the missing limb, reroute them to residual muscles that are still there, so now we can actually take that information that used to be traveling to nothing and have a way to actually record from it, amplify it, and translate that to useful movement," explained Dr. Chi.

After attaching the arm to a titanium implant on his bone, Johnny does a training set for specific movements. His brain tells his muscles what to do. Signals go through Bluetooth Myo bands, into a cellphone, and back to the arm.

"You don't have to think anything different. It works just like your natural arm. You do like this, you grab things; you know you rotate your wrist, you bend your elbow," Matheny said.

It's not easy. Johnny went through months of training before he could do things like drink from a glass. But the end result: priceless!

Matheny continued, "Somebody that you know is totally dependent on somebody- now they've got a little bit of their pride, a little bit of their life back because they can reach down and get their own drink, they can feed themselves."

Johnny sees endless possibilities.

Johnny is the first person in the country with an osseointegration implant and TMR. It gives him greater range of motion and removes the need for a shoulder harness to keep the prosthetic on. His prosthetic arm has sensory capabilities and later this year Johnny will have surgery at Case Western to be a user of that capability. That means he'll be able to feel things!

For more information on this report, please contact:

Erik Robinson

robineri@ohsu.edu
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