Implantable devices work in diabetic pigs for over a year–human tests could be next.

Researchers have successfully tested a fully implantable glucose-monitoring device in pigs for nearly two years, according to new research published today in Science Translational Medicine. Scientists plan to file for approval from the U.S. Food and Drug Administration to begin human tests. Eventually, researchers aim to couple this kind of device with one that would automatically deliver insulin in response to changing blood-sugar levels.

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