Hi-- thanks for the vote! I have had a few patients go through surgery and I am always surprised by how long the Suboxone sticks around. I think the best length of time off Suboxone is about three days; That alllows for most of it to be out of the body, but the worst withdrawal takes about three days to hit-- so it is a bit of a compromise. Remember, though, that even if you could get all of the buprenorphine out of your body, your tolerance is going to be pretty high. I usually give oxycodone, 15 mg tablets, one to two every 4 hours for pain, to treat the post-op pain. I did get a note from an anesthesiologist once who claimed that using the potent, lipid-soluble medications will 'cut through' the block from buprenorphine; with that in mind I recommend using fentanyl PCA (patient controlled analgesia) for inpatients, and for outpatients I recommend hydromorphone or dilaudid pills.
Good luck with the surgery!