Wireless devices swim through your bloodstream and fix you up,

Implantable medical devices will eventually dispense drugs, get rid of blood clots and perform micro-surgeries inside our bodies, but powering them could be problematic. If the point is to have minimally invasive gadgets keeping tabs on our health, cutting patients open to swap out their batteries is not an ideal… » 2/24/12 7:10am 2/24/12 7:10am