Imagine a blood test that's always running—and doesn't hurt a bit. Researchers in Switzerland have developed an implantable miniature blood lab that sends its findings to a smartphone via Bluetooth.
The device, half an inch long and drawing 1/10th of a watt of power from a battery patch worn on the skin, uses enzyme-coated sensors to measure cholesterol, glucose and other items of interest to doctors. Feedback from the device also could be used to calibrate dosages of chemotherapy for cancer patients. A prototype has been tested on animals, and researchers at the École Polytechnique Fédérale de Lausanne say that the device should be commercially available for use on humans within four years.
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