No smoking four weeks before operation cuts risks: WHO

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The study found that nicotine and carbon monoxide, both present in cigarettes, can decrease oxygen levels and greatly increase risk of heart-related complications.

Patients who stop smoking at least four weeks before an operation significantly reduce the risk of having postsurgical complications because their blood flow improves, according to a study published Monday.

The WHO study, conducted in cooperation with the University of Newcastle, Australia and the World Federation of Societies of Anaesthesiologists , found that every additional tobacco-free week beyond the four weeks improved health outcomes by 19 percent. It said the damage on lungs from tobacco smoke also made it difficult for the proper amount of air to flow through, and found that smoking could delay wound healing because of its distorting effect on the patient's immune system.

 

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