BOSTON—Implanted electronics can steady hearts, calm tremors, and heal wounds—but at a cost. These machines are often large, obtrusive contraptions with batteries and wires, which require surgery to implant and sometimes need replacement. That’s changing. At a meeting of the Materials Research Society here last month, biomedical engineers unveiled bioelectronics that can do more in less space, require no batteries, and can even dissolve when no longer needed.
“Huge leaps in technology [are] being made in this field,” says Shervanthi Homer-Vanniasinkam, a biomedical engineer at University College London. By making bioelectronics easier to live with, these advances could expand their use. “If you can tap into this, you can bring a new approach to medicine beyond pharmaceuticals,” says Bernhard Wolfrum, a neuroelectronics expert at the Technical University of Munich in Germany. “There are a lot of people moving in this direction.”
One is John Rogers, a materials scientist at Northwestern University in Evanston, Illinois, who is trying to improve on an existing device that surgeons use to stimulate healing of damaged peripheral nerves in trauma patients. During surgery, doctors suture severed nerves back together and then provide gentle electrical stimulation by placing electrodes on either side of the repair. But because surgeons close wounds as soon as possible to prevent infection, they typically provide this stimulation for an hour or less.
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