"Health & Medical News"

Police in Missouri and Arizona are field-testing a new handheld device that the manufacturer claims can detect traces of methamphetamine on clothing, skin, and other surfaces, USA Today reported Nov. 5.

The device, made by CDEX of Tucson, Ariz., uses ultraviolet light to detect traces of the drug as small as one microgram, according to CEO Malcolm Philips. The scanner can distinguish between illegal meth and pseudoephedrine, a chemically similar but legal component of cold medications.

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Inspired by the device used to find lost coins in the sand, Johns Hopkins undergraduates have invented a small handheld metal detector to help doctors locate hidden orthopedic screws that need to be removed from patients’ bodies. The device emits a tone that rises in pitch as the surgeon moves closer to the metal screw. It also serves as a surgical tool to guide the removal of the hardware.

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