According to a number of sources in the medical field, a significant injury to an artery located in an extremity is capable of causing unconsciousness and leading to eventual death in as little as ten minutes.
Tactical Combat Casualty Care (TCCC) is a concept developed for highly trained military medics in combat. These medics operate in a completely different arena than their civilian counterparts, working within an expanded scope of practice that is only allowed when operating in a specific environment, such as a combat zone.
In the September 2008 issue of S.W.A.T., Jeff Randall answered the request of some readers by writing about remote first aid. Jeff did a good job of covering what you may face once you leave the safety of your home, though I should really say, once you leave the safety of your bed, since most accidents occur in the home.