Parallels Between E-cigarettes and Smoking Tobacco
Studies have shown that cigarette smoking has been implicated as a risk factor for postoperative complications in many different surgical subspecialties. Patients who smoke and undergo surgery have longer hospital stays, a higher risk of readmission, a higher rate of being admitted to an intensive care unit, and an increased risk of in-hospital mortality in comparison to nonsmoking patients.[44–47] Longer periods of smoking cessation appear to be more effective in reducing the incidence/risk of postoperative complications. A systematic review of 25 studies on the optimal timing of smoking cessation concluded that at least 4 weeks of abstinence from smoking reduced respiratory complications, and abstinence of at least 3–4 weeks reduced wound healing complications.[48] A retrospective review of ambulatory surgeries demonstrated that smokers may be at a greater risk of postoperative complications, such as delayed wound healing, pulmonary complications, and mortality than nonsmokers.[49]
Smoking and vaping appear to be equally detrimental to wound healing and to be associated with a statistically significant increase in flap necrosis compared with the unexposed group. The results suggest that vaping should not be seen as a better alternative to cigarette smoking in the context of wound healing.[50]
E-cigarettes may have just as much of a detrimental effect on tissue oxygenation as traditional cigarettes. Thermal imaging has demonstrated that the use of ENDS reduced cutaneous blood flow in the peripheral circulation in humans.[51] Despite the normal pulmonary function tests, asymptomatic patients with a daily use of e-cigarettes for at least 1 year had a significant ventilation–perfusion mismatching that worsen immediately after vaping.[52] Studies suggest that subclinical alterations in the lung function in asymptomatic patients who routinely use e-cigarettes are usually not detected by routine spirometry.[53] It is, therefore, not practical to perform preoperative pulmonary function tests in asymptomatic vapers.
Anesth Analg. 2021;133(3):562-568. © 2021 International Anesthesia Research Society