I do this for real for a living, and even though I do recall being masked and put to sleep with ether anesthesia (no longer used for several reasons) as a child many years ago, I've never had the slightest arousal or sexual stimulus from anything I've either done or seen. Although taking the patient from awake to asleep and safely intubated after induction of anesthesia with either gas or IV meds (most common) can sometimes be nerve-wracking, usually it's routine and very satisfying to see your patient asleep with stable vital signs in front of you. I've also received a lot of anesthetics myself from infancy through about 2002, and while I actually find "going to sleep" (it's not really true sleep, very different, RIP Mr. Jackson) pretty relaxing, again it's not sexual at all either dozing off or awakening.
I'm not much of a MedFet fan usually, though some of my kinks are related, like anal play, enemas and submission, even though I was brought up in a medical (RN) household and exposed to it through mom as well as multiple medical conditions and surgery since childhood. It just continues to show us how complex human psychology and origins of kinks and fetishism are. I had enormous exposure growing up, but no serious ongoing MedFet interests (I don't mind doing it at all, but it's not a big arouser for me), while others have a completely different experience with how they were raised vs their sexual interests. I really do find it fascinating.
So to those of you getting seriously aroused by anesthesia videos or stories or play sessions, more power to you, enjoy yourselves, but just do it as fantasy (with a few props if you like), but stay away from any actual drug use and be safe. Leave it up to the people who know how to get you anesthetized AND BACK AGAIN (not screaming, just have no Italics here) safely and only done when you really need surgery or procedures for your health. Fantasy all by itself can be satisfyingly powerful.