Did Google just patent a cancer-killing wristband?

Google has filed a patent application with the World Intellectual Property Organization (WIPO) for a wrist-worn device that could destroy cancer cells in the blood. The patent application, which has the name “Nanoparticle Phoresis”, describes a wearable device that “can automatically modify or destroy one or more targets in the blood that have an adverse health effect”. These targets could include enzymes, hormones, proteins, cells or other molecules that, when present in the blood, may affect a medical condition or the health of the person wearing the device. The wearable device is able to modify or destroy the cells by transmitting energy into the blood vessels. The transmitted energy could be a radio frequency pulse, a time-varying magnetic field, an acoustic pulse, an infrared or visible light signal. This energy brings about a physical or chemical change in the targets, with the aim of reducing or eliminating adverse health effects.