Why should I stop smoking before surgery?

So we all know that smoking is not a good thing for all of our health and every part of our body. It doesn't just affect your lungs, it can affect your brain, your heart and your peripheral vascular system as well. The most important thing to remember here is that smoking for any amount of time can have a positive impact and we know that within a day of stopping cigarettes your heart rate and your blood pressure improve. So it may feel like there's no point doing it, you've done it for years, however even a number of days, hours, weeks before the operation that can set your body in a much better situation to survive and do well after the operation.