"Soldier boy here is named Javier, and he is currently suffering from a bone compression. As for his life story, that will have to wait until after I preform field surgery." came Nathans reply. 

Fortunately for traveling surgeons everywhere standardized equipment had been in the works since the twentieth century. The crate which David handed him was no mere box, it was the latest in modern medical equipment with a builtin disinfection system and a secondary set of maintenance equipment. 

Disinfect, incision, clot, peel, clot again, bone saw, bone gel, bone setter, a few pins, un-peel, and finally cauterize. 

"There, not exactly a direct tissue regeneration but you should be able to walk around without incident. Don't push it to hard though. Now, lets see about that extra hand shall we?"