Do you have a damaged kidney? What about a clogged blood vessel? Put away that scalpel Doctor! You're not slicing anyone up today. Just inject your unconscious patient with a shot of Abultec's Repair-a-Nano serum. A specially programmed army of nanobots will find their way to the damaged part of your body and get to work. Utilizing the latest in medical technology, the bots: cut, stitch, sew, repair and medicate you back to good health. And when their job is done, they slowly dissolve into your bloodstream and eventually come out with the rest of your body's waste products.
There has been talk of Abultec's technology being used by the military to push the limit of human endurance and pain. Turns out some "volunteers" have a continuous stream of the serum injected into them while "doctors" blow away chunks of the poor soldiers. The newer serums repair the saps before the wounds do them in, but the first round or two of volunteers weren't so lucky.