The device, Vein-Viewer, projects infrared light on a certain location. The light is then absorbed by the blood, and reflected by surrounding tissue. The device captures, processes and digitally projects the veins on the surface of the skin.
The writer is called Michael Guta, and he is an ICT coordinator in developing countries. What he does is assesing the viability of implementing technologies in rural areas where there is minimal infrastructure available. The page is relevant due that is combines healthcare and technology, and has lots of writers and advertising.