Analysis of dynamic pulmonary functions in air conditioned work environment

Authors

  • Anu T. E. MBBS Student, Jubilee Mission Medical College and Research Institute, Thrissur, Kerala
  • Biju Bahuleyan Department of Physiology, Jubilee Mission Medical College and Research Institute, Thrissur, Kerala

DOI:

https://doi.org/10.18203/2320-6012.ijrms20161928

Keywords:

Thermal comfort, Air conditioners, Spirometer, Pulmonary functions

Abstract

Background: Thermal comfort is the condition of mind that expresses satisfaction with the thermal environment. Maintaining thermal comfort is the prime aim of heating, ventilation and air conditioning (HVAC) design engineers. Thus air conditioning has become a necessary luxury. Work environment is made comfortable to increase productivity by using air conditioners (ACs), but literature shows that long term exposure to ACs has deleterious effects.

Methods: After obtaining institutional ethical clearance, the participants for this descriptive study are recruited from the staff of the hospital, based on inclusion and exclusion criteria. 40 subjects in the age group of 25-45 years using ACs for at least last 6 months for a minimum duration of 6 hours per day are included in the study. The pulmonary functions of the subjects are assessed using computerized spirometer (micro Quark) in the afternoon hours. The dynamic lung volumes obtained are compared to the predicted values according to age and sex of the individual.

Results: The dynamic pulmonary function parameters such as FEV1, FVC, FEV1/FVC and PEFR were assessed. FEV1, FVC and PEFR were found to be decreased in subjects when compared to their predicted values. Marked deterioration in dynamic pulmonary functions was noted in 40-50 years age group. As the duration of exposure increases, the dynamic pulmonary functions have decreased to a statistically significant level. Pulmonary parameters are markedly decreased in subjects with BMI>23.5.

Conclusions: The results of the study indicate that the subjects working in AC environment for a long duration are prone to develop restrictive lung diseases. Hence, study concludes that periodic pulmonary function assessment should be made mandatory. Further, regular maintenance of ACs is also recommended.

 

References

Hancock PA, Ross JM, Szalma JL. A Meta-Analysis of Performance Response Under Thermal Stressors. Human Factors: the Journal of the Human Factors and Ergonomics Society. 2007;49(5):851-77.

Cartier CN, Ghezzo A. The influence of the duration of cold dry air on the resulting bronchoconstriction in ashthmatic subjects. Eur respire J. 1989;2:741-5.

Baur X, Richter G, Pethran A. There are reports of increased prevalence of IgG induced sensitization and hypersensitivity pneumonitis in nonsmokers exposed to aerosols of a contaminated air-conditioner. Respiration. 1992;59(40):211-4.

De Filippis, Spinaci A, Coia M. effectivenss of the maintanence operations on the airconditioning system of a university bulidingin relation to the microbilological quality of the air indoor. Ig Sanita pubbl. 2003;59(6);365-72.

Kuwahara Y, Kondoh J, Tatara K, Azuma E, Nakajima T, Hashimoto M, et al. involvement of urban living environments in atopy and enhanced eosinophil activity: potential risk factors of airway allergic symptoms. alergy. 2001;56:224-30.

Borse LJ, Yadav RD, Modak HK, Chandan LM. Pulmonary function test in young healthy males exposed to air conditioned work environment. International journal of health sciences and research 2012;2(6):35-41.

Togias AG, Naclerio RM, Proud D, Fish JE, Adkinson NF Jr, Kagey-Sobotka A, et al. Nasal challenge with cold dry air results inrelease of inflammatory mediators possible mast cell involvement. J Clin Invest. 1985;76(4):1375-81.

Kumar P, Marier R, Leech SH. Hypersensitivity pneumonitis due to contamination of a car air conditioner. N eng J. med. 1981;305:1531-2.

Banaszek EF, Fink JN. hypersensitivty pneumonitis due tocontamination of an airconditioner. N engl j med. 1970;283;271-6.

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Published

2017-01-03

How to Cite

T. E., A., & Bahuleyan, B. (2017). Analysis of dynamic pulmonary functions in air conditioned work environment. International Journal of Research in Medical Sciences, 4(7), 2661–2664. https://doi.org/10.18203/2320-6012.ijrms20161928

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Section

Original Research Articles