Kathleen, I wonder, if, when you are all done with the surgery and ready to go home, that the vets would give you a written operative report. That would have the anesthesia doseage etc on it. Then your local vet would have that to use in an emergency? Or they could send one.
I got one yesterday when Emmie had her pins removed from the knees. Type of anesthesia, duration, how it was given (masked down, intubated) and how they kept her warm ("warm water blanket") Everything was documented. There was a fee for each thing.
We all will be thinking of you and her during this difficult wait time!