[SRD]

Dolly's getting a dental cleaning next Thursday, her vet told me that he would use gas anesthesia on her since its safer.
I was doing some research online about different methods of anesthesia, and in one article it mentioned that gas anesthesia rquire a prior injection, that kind got me concerned?
Dolly has gone under anesthesia a couple times before and both times the pre bloodwork came out okay and she made it through with no problem. of course they are still gonna perform pre bloodwork this time, but Im still very nervous about it!