I'll have to see if the research for the article was based upon a Duffelblog article when I get the chance. That was the first thing that came to mind.
"This summer in Birmingham, Ala., a man came into the emergency room where Croushorn works with a gunshot through his upper arm, and was bleeding profusely. The bullet had pierced the armpit, destroying one of the body’s largest arteries....He applied the abdominal tourniquet and persuaded a wary nurse to remove her hands from the wound. There was no bleeding. Croushorn said the patient made it to the operating room, where a shocked vascular surgeon repaired six inches of torn artery. The man lived."
I cannot see how that would work, but then I don't watch a lot of television doctor programmes.