Medical 3D Printing & Bioprinting
While Alex, a military automative engineer, designed a cheap cost Vein finder for his girlfriend, it also became a breakthrough how effectiveness of 3D printing can not always mean cost. This Battery powered DIY device is easy to use and penetrates skin, fat tissue and oxygenated blood with ease.
Source: http://www.instructables.com/id/3d-Printed-Medical-Vein-Finder/