To cop an improper analogy from another thread, one is none - one event doesn't make for a re-examination of fundamentals. One life "saved by x" (unconfirmed) doesn't mean that everyone should start carrying x to save lives. We don't know the doctor, or his general expertise or the basis for saying what he did. We don't even know his name. We aren't quite sure how far he was from treatment, or how he got there. I don't know pit vipers rattlesnakes, but will assume they are fairly venomous, especially 6 footers. There's not a lot to go on really.