can science save lives with solar power?
by rick richardson
technology this week
pengju li and his colleagues at the university of chicago have created a wireless, ultrathin pacemaker that utilizes light similarly to a solar panel. because it conforms to the shape of the heart, its design reduces interference with the heart’s normal function while simultaneously eliminating the need for batteries. their findings, just released in nature, provide a novel strategy for heart pacing and other therapies requiring electrical stimulation.
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medical devices called pacemakers are inserted into the body to control cardiac rhythms. they are comprised of battery-operated electrical circuits with leads that are fixed to the heart muscle to stimulate it. leads, however, can break and cause tissue damage. once implanted, the leads’ position cannot be altered, which restricts access to various cardiac areas. because they use stiff iron electrodes, pacemakers could also cause tissue injury when they are used to regulate arrhythmia or to restart the heart after surgery.
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