Dear Sue -
I am so, so sorry to hear this. I agree that immediate pain control is the thing to be done first.
First things first, if the oxycondone is not doing the job, even at the higher dose, you may want to ask your PM doc about a stronger narcotic than oxycodone, say methadone, Meperidine (demerol hydrochloride syrup), or even oral Dilaudid (hydromorphone). Just make sure you get an appropriate prescription med to counteract what could otherwise be an immediate shutdown of your GI track: lately they seem to be doing a lot with very small doses of opioid antaganists, which keep the gut working but aren't enough it leach into the blood stream and thereby counteract the property of the opioid in the first place. I was regularly using Naloxone Hydrocloride (Narcan) taken via an oral syringe, until the price went from between around $140 a case - roughly a 40 day supply - to just under $800 in less than a year (it's generic, but there's only one manufacturer) so I went off in favor of over the counter products, only to have my combination of Oxcycontin/oxcycodone basically stop working, at which point I was switched to 30 mg. of methdone a day, and a couple a weeks later, I had two hernias to show for it!
I'm probably preaching to the choir on this one, but this is what I have learned in the past few weeks since it became apparent I needed surgery for the double hernias: putting aside the question of the appropriate sugeon, the procedure as a whole has to be done in a hospital where you can get a pre-op consult with the anesthesiologist to go over your drug list and the recommendation of your pm doc. concerning the anesthetic component of the procedure, blocks, continuous regional anasthesia, etc. Turns out, it's a simple yes or no question on whether such consults are available. If they aren't, the advice I've gotten from a very well regarded general surgeon in a "regional medical center" was that I had to move on down the road to a university medical center or other tertiary treatment facility. Otherwise, what happens at many places - including his hospital - is that you'll have an anesthesiologist assigned the day before the procedure, who will just be looking at your list of meds a few minutes before they bring you in. My internist told me that in that scenario, he was personally familiar with situations where such randomly drawn anesthiosiolgists, looking at lists of prescription drugs far shorter than my own, had thrown up their hands and refused to go forward, not being 100% sure how any particular general anesthetic would react to all the meds the patient was on. And that's not even talking about having the special precautions taken that are appropriate for a CRPS patient entering surgery!
I'm sorry for going on so, but I hope that some of this information may be news to you and therefore potentially useful.
You are very much in my thoughts. As well I'm sure, of all of the old-timers on this board, and then some.
Mike
ps Dubious is 100% correct in his comment below. There is no reason to wait until surgery to attack the barrage of pain signalling current hitting the dorsal horn of your spinal cord for which pain killers provide no protection at all. Perhaps a hard hitting series of bilateral lumbar sympathetic blocks, where even though your CRPS is chronic -on account of which there may be little or no pain signalling "from" the leg even though that's where it is surely "felt" - the knee issue is brand new, and should be responsive to blocks for the same reason that prophylactic blocks of one sort or another help prevent spread in the OR.