UCLA researchers in the Department of Bioengineering have developed a novel invention for wirelessly powering long-term implantable medical devices.
Electrically powered medical devices such as cardiac pacemakers, deep-brain stimulators, and other devices require wires and large batteries to deliver power. Implantation of these devices require leads which are known to have various failure points, including dislodgement, fracture, electrical failures, and more. One million cardiac pacemakers are installed annually, and approximately 3% of patients receiving pacemakers have leads move out of place. Powering these medical devices wirelessly would eliminate the need for leads with many of these devices. Wirelessly powering medical devices has been studied extensively, but issues of power dissipation over long distances and tissue absorption loss and heating have been difficult to overcome.
UCLA researchers have developed a wireless system for implantable medical devices. The three-component system includes a primary power source that is placed subcutaneously or on the skin, which supplies a secondary, long-life power source inserted close to the implanted device that provides the functional signal to the body. The majority of the power consumption occurs in the secondary power source. A low frequency (e.g. 1-5 MHz) can be used to transmit power from the first to second component, resulting in heat dissipation at low enough levels to meet regulatory requirements. The proximity of the second component and implanted device allows a higher frequency to be used between them, providing for greater power delivery. The system design results in smaller implantable devices than other designs, fixation approaches that are safer and more secure and versatile, and the ability to use minimally invasive implantation methods.
|United States Of America||Published Application||20170173345||06/22/2017||2016-214|