Due to an unfortunate run-in between an SUV and my motorcycle, I found myself with a broken finger. Unhappy with the splint I received in the ER, I designed and printed my own.
Very simple: a 3d printer, measuring tape, some adhesive wrap, and scissors. I used a lulzbot mini running HIPS, my field notes notebook, and 3m nexcare waterproof stretchable medical tape. I cut the tape in half to fit on my finger more comfortably.