There is no National Standard, hell, there is no standard across county lines, let alone across the nation (US). How many systems do you think still advocate w/o fluids for hypotensive trauma patients? MAST trousers? Hyperventilating head injuries? Studies have shown that what we once believed helpful was actually not. How long should a system wait until they change the way they approach patient care? Do we need Dr. Pepe to tell us when? Seattle Fire department? Department of Transportation, god forbid?
I am not telling anyone to change the way they do business, they should follow local guidelines, however there is good data out there that would suggest to elect not to board the patient with a penetrating injury to the torso is not negligent, in fact, it is based on sound medical research. Deviating from protocol on the other hand could get you into trouble. As I have stated, I am not required to board this class of patient, and don't. I utilize tourniquets on vascular injuries by department guidelines, and good evidence based medicine. The vascular surgeons who lecture for us are 100% in favor of this.
Look at therapuetic hypothermia for ROSC in the medical arrest patient. If someone were to pack their patient in ice based on the research, yet against protocol they would be in a world of trouble. Systems that choose to utilize TH do so because of good science. It is certainly not a National Standard, and probably won't be for some time. Doesn't mean it isn't the right thing to do.