Effect of Smoking on Nasal Mucociliary Clearance.

Nasal mucociliary clearance (NMC) system is an important defence mechanism in respiratory tract. The contents present in the smoke are found to be toxic to cilia in vitro. Our study aims at evaluating the NMC in smokers so as to know effect of tobacco smoke on ciliary function and also comparing it with non smokers. We also studied effect of duration, intensity and pattern of smoking on the NMC. A total of 60 participants in the age group 21-40 years (30 smokers and 30 non smokers) were included in the study. Saccharin test was performed in all participants. A 0.5 mm diameter particle of saccharin was placed 1 cm from the anterior end of the inferior nasal turbinate. The time duration was noted for the first appearance of sweet taste. The mean NMC in smoker group was 16.53 min and in nonsmoker group was 9.28 min On comparison it was found that NMC time in smoker group was significantly higher than nonsmoker group  < 0.001 also a positive correlation noted between pack years of smoking and NMC. Saccharin test is a simple test to assess NMC. The prolonged NMC in smokers may be due to reduced ciliary activity or due to changes in viscoelastic properties.