Can adults be put under before going into the operating room?

I am a 43 yo make with cerebral palsy. I fell at work June 21 and dislocated my shoulder. I also found out I have 2 full thickness tears in my rotator cuff. I will likely need surgery to repair it.

Because of my CP, I have had quite a few surgeries, but they were all when I was a child.I know they put children out now for surgeries soecifically to avoid trauma like mine. Does anyone know if it is possible to put an adult under general anesthesia before going into the OR so I can avoid freaking out ?

Sorry folks. I have a few typos in this post but I don't see where I can go back and correct them.

When I had my shoulder surgery they gave me some meds in a cup that had me very relaxed before I even went into the OR

Hi Sugga82

Thank you for the reply. They told me they would do that. I am just hoping I am asleep before I get in there. I have a phobia of going into the OR because of all the surgeries I had as a child. I know it's dumb for me to be ohobic of something like that, but I am.