I thought this was interesting :)The AccuVein AV400 digitally displays a map of the vasculature on the surface of the skin in real time, allowing clinicians to verify vein patency and avoid valves or bifurcations. It is handheld and lightweight, weighing only 9.7 ounces (275g), and easily converts to hands-free with the use of optional wheeled or fixed stands. The medical grade design allows the device to be easily wiped clean, bagged for use in isolation, and does not require calibration as it is permanently aligned.