Researchers at George Washington University's School of Engineering and Applied Science said they've come up with a hand-held diagnostic device that would enable portable healthcare and quick testing. The university's GW Today online news site describes the device as a "smartphone-controlled liquid handling system" that relies on advanced microfluidic technology and sits in the palm of your hand. It can display test results within 15 minutes by way of a handy mobile app, according to the story. Such a diagnostic tool could be used in physicians' offices or emergency rooms and test for conditions such as heart attacks or strokes. Story