I agree, I think if you vape 0mg for 3 days prior to surgery and drink lots of fluids to flush the nicotine out of your system you will be fine! Might want to get a pack of 11mg, 8mg, 4mg, then a few packs of 0mg. Vape the 11 for a few days, the 8 for a few, the 4 a few then stick to 0's for 3...