The Physiological Basis Of Pulmonary Function Testing

Our plain-English summary of The Physiological Basis Of Pulmonary Function Testing, by M.D. Altose (1979).

The study

• Author: M.D. Altose
• Published: Clinical Symposia 31(2):1-39 (1979)
• Our copy: from Johns-Manville's own medical library, J-M no. 001008. The article is still under copyright, so we describe it here rather than post it.

In plain English

This article was an educational review, not a research study. It was adapted from a published illustrated volume on the respiratory system. The author explained the body processes behind pulmonary function tests, including breathing muscles, lung volumes, lung stretchiness, airflow resistance, blood flow, diffusion, gas exchange and oxygen transport. The article reported no new data and did not study any group of people. It did not mention asbestos or asbestos-exposed workers, and it did not discuss any disease in relation to asbestos. Its introduction listed bronchogenic carcinoma only among lung diseases of rising incidence. Among the conditions it used as examples, it described pulmonary fibrosis as a restrictive disorder. The author described restrictive disorders as reducing lung volumes and increasing the lung's elasticity, making it stiffer. The author said fibrosis also thickens the barrier that gases must cross. It contrasted this with airway obstruction in asthma, bronchitis and emphysema. The author noted that the closing volume test is nonspecific. In the author's framing, pulmonary function testing is useful for following the course of disease.

We wrote this plain-English summary from the full article with the help of AI, and a second AI model checked each sentence against the article. It is not the authors' wording; the abstract and the article are their own account.

What the study did and found

• Design: educational review of respiratory physiology and pulmonary function test methods (adapted from an illustrated reference volume); no original data
• Main results:
  • The author's introduction listed bronchogenic carcinoma, chronic obstructive lung disease and viral pneumonias as having rising incidence; this was not linked to asbestos.
  • The author described restrictive disorders, giving pulmonary fibrosis as an example, as reducing all lung volumes.
  • The author described restrictive disorders such as pulmonary fibrosis as increasing the elasticity of the lung.
  • The author described lung compliance (stretchiness) as reduced by disorders such as pulmonary fibrosis and increased by emphysema.
  • The author described the barrier to gas diffusion as thickened by interstitial pulmonary edema and fibrosis, and by intraalveolar edema and consolidation.
  • The author described airway obstruction (asthma, bronchitis, emphysema) as decreasing expiratory flow rates in proportion to the severity of obstruction.
  • The author stated that the closing volume test is nonspecific.
• The authors' conclusion: The author presented pulmonary function testing as useful for characterizing lung disease, following its course and measuring responses to treatment.

Topics

Medical terms in this study, explained in our Lexicon: Pulmonary Function Test (PFT), Bronchogenic Carcinoma, Pulmonary Fibrosis, Fibrosis, Emphysema.

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