Marshall
Turtle Keeper + CPL(H)
With turtle rescue or any animal rescue comes that inevitable question, what to do with a lost case with no hope ? Such as massive trauma and infection. Well so far I have only came up with one method and I know this sounds sad but this is reality. My personal method is what I call "well deserved rest" in which we put the dying, sick, injured turtle in a bath of warm water with an anesthetic that does not numb the turtle but will ease any pain followed by a slow decrease in temp until the turtle goes into torpor (napping) and finally an infusion of nitrogen gas which is the only way to remove oxygen from the system without a panic or pain response which takes about 2 minutes until the turtle is gone... Yes I know its sad but an injured turtle can suffer for up to 40 days otherwise so you have to be prepared in my line of work for these situations.
Heres some of the "science" https://en.wikipedia.org/wiki/Inert_gas_asphyxiation
Heres some of the "science" https://en.wikipedia.org/wiki/Inert_gas_asphyxiation