[ [quote] quote=marduk]
Unfortunately in survival situations if someone is ill enough or has injuries such that oral rehydration isn’t possible, they may not survive.


Absolutely, unarguably true. But mostly, this forum is about finding ways to not die in a situation that would be greatly simplified by death. Some of the medical techniques that worked in the late 19th and early 20th centuries might be adaptable to survival scenarios in which current therapies fail due to lack of resources. Next topic: field surgery under ether anesthesia.