An Indian Study of Computerized Pulmonary Function Tests in Patients Referred to Physiology Department

  • Amrith Pakkala Professor Dept of Physiology Shridevi Institute of Medical Sciences & Research Hospital,Tumakuru,Karnataka,India
  • Ashwini K Shetty
Keywords: PFT, FEV1, FVC, FEV1/FVC, Obesity, surgical


Background: Obesity is a modern day epidemic. Pulmonary function tests are likely to be compromised to varying degrees in these individuals, thus affecting their artificial ventilation under general anesthesia. It is thus important to study the pattern of pulmonary function in these subjects in a group likely to undergo surgery for varying reasons.                     Materials and Methods: 30 male subjects between 45-60 years attending the surgical outpatient with a body mass index [BMI] of more than 25kg/m² who qualified as obese and a similar number of subjects with BMI < 25kg/m² as controls were randomly selected.  Flow Volume loop, FEV1, FVC and FEV1/ FVC were recorded using computerized spirometer. Results: FEV1, FVC and FEV1/FVC ratio measured in obese patients were significantly reduced (p < 0.05) when compared to normal BMI individuals.  Conclusion: The incidence of restrictive tendency is more in the obese as compared to controls. As the changes in respiratory mechanics due to obesity are almost completely reversible, early intervention in such patients will ensure lesser chance of complications on the operation table and post-operatively. With the advent of computerized spirometry analysis of flow-volume loops is indeed of great help to the obese.

Author Biography

Amrith Pakkala, Professor Dept of Physiology Shridevi Institute of Medical Sciences & Research Hospital,Tumakuru,Karnataka,India
Prof of Physiology


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