I quit 2 1/2 weeks ago with Chantix and a nicotine vaporizer (basically an ecig, but rechargeable & refillable). I saw my surgeon last week & asked if the vaporizer would be a problem since it is A) inhaled and still nicotine. He said he didn't think so, that his main concern was lung capacity, not nicotine itself. He hasn't mentioned a pre-surgery blood test, either. To be on the safe side, I will probably transition to nic gum if needed a month or two before surgery. I'm hoping it won't be necessary, though...I didn't even touch the inhaler yesterday til almost 6:00 pm, so I can really tell I'm needing it less & less each day. Don't try & cheat the requirements...they are there for a reason. Good luck to you!