I'm a Wilderness First Responder and in the latest curriculum the Sawyer extractor is no longer recommended for snake bite; recent research studies showed that it had no positive effect, could damage tissues, and delayed getting to the best course of action - which is immediate evacuation for treatment. (For insect stings, still OK to use, though not always effective.)

There's a "wrap" treatment for elapid bites (coral snakes and all kinds of tropical snakes not found here) that shows some promise - but evacuation with elevation of the bitten limb if possible is still the way to go for those and for all pit viper bites.

(Oh - and definitely no "cut and suck" treatments - those have been out for years as they cause damage, expose the wound to further chance of infection, and get very little venom out!)