I'm having gastric surgery in the next couple of months. the dr. will not operate until i've not smoked for 2 months. if i get a vape and only put cbd oil, no nicotine will that hinder as well?

Anything you dose through your lungs can alter your anesthesia risk for such a procedure. Anything you vape can alter the blood flow in tiny capillaries and impair healing, not just nicotine. DeBakey, the famous heart surgeon had all cigarettes removed from soldiers rations because they increased losses. Be smart about it and you can recover faster.