2BigReds, I can't help with the kidney procedure at all and for that I'm sorry, but I think it may be worth inquiring about a spinal block to help you cope with the procedure if they only use a light sedative, that is if you are not going to panic about not being able to feel your legs.
Make sure you voice your anxiety concerns to your anaesthetist, that is probably the best thing that you could do for yourself and make sure he/she listens, because they should be able to put a sedation/calmer through an IV line before you go in to the theatre to help you along with it.
Personally, I have agoraphobia. Severely. I mean severely. Today I had my colonoscopy. I told every darn nurse and doctor and surgeon and anaesthetist that walked through that door that I have it and can not cope full stop. I made sure every single one of them knew about it. I was wheeled through the hospital corridor and started having a full blown panic attack worse than I've ever had before, before I even got into the theatre, I had to concentrate so hard on just breathing that I couldn't physically move, talk, or hear any of my surroundings. My whole body shook and I was crying hysterically but completely silently. That was about the time that my head went, hold on. RUN. Get the heck out of here, just run. But physically I couldn't do anything, I was paralysed by my concentration on my breathing. As soon as they saw what was happening they were in there with a sedative faster than you could say HELP, and not 5 seconds later I was in bliss, happy as Larry breathing just fine and looking at "da Purdy lights on te roof LOL" seconds later I was out to it from the anaesthetic they put in, I don't remember the rest of the procedure, just waking up in recovery and telling the nurse I was still in my happy place and no I don't need my mum.
^ And that is my reaction after YEARS of practising control, because my phobia does rule my life in all aspects.
I know my reaction is extreme thanks to my phobia, but the point of that story is for you to make sure that you voice your concerns to everyone who is going to be involved in the procedure, if the first person doesn't listen or you think they haven't listened well enough, voice it again. And again, and again until somebody is helpful.
And just remember, the pre-thoughts about it are always worse than the procedure itself, and afterwards your most likely going to go, "well that was a whole lot of work up for nothing."
Good luck with the procedure and I hope all goes well, and I feel for you, you shouldn't have to be going through any of this at only 21, I'm 18 so I feel for you on the medical issues at a young age side, but I can't directly comment on the procedure you are having done. All the best, and I'll say it again, voice your concerns, make them heard, ask what your options are.
This might sound weird, but do you have the option of a safeword? Like a word you can say/scream/cry whatever during the procedure if you can't cope or need help or more drugs? May help to discuss this with a sympathetic nurse or anaesthetist and it may help ease your anxiety knowing you can do something about it if you absolutely need to. And breathe, remember to breathe going into theatre, long deep breathes
R.I.P ~ Bubbles - 25yo tb mare - 13.04.2011 ~ 8:30am ~ passed away naturally and peacefully in my arms