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Related Experiment Videos

Pulmonary function of a firemen-diver population: a longitudinal study

S Bermon1, J M Lapoussière, C Dolisi

  • 1Laboratoire d'Exploration Fonctionelle Respiratoire, C.H.U. Hôpital Pasteur, Nice, France.

European Journal of Applied Physiology and Occupational Physiology
|January 1, 1994
PubMed
Summary

Professional firemen-divers showed better lung function over time, with hyperbaric exposure potentially offsetting aging effects. However, decreased small airway function suggests diving may cause chronic effects.

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Area of Science:

  • Pulmonary Medicine
  • Occupational Health
  • Hyperbaric Physiology

Background:

  • Professional firemen-divers are exposed to unique occupational and environmental stressors.
  • Longitudinal data on pulmonary function in this cohort are limited.
  • Aging is known to affect lung function, but occupational exposures may modify these changes.

Purpose of the Study:

  • To assess longitudinal changes in pulmonary function in male professional firemen-divers.
  • To investigate the potential impact of hyperbaric exposure on lung function over time.
  • To identify potential occupational effects on small airway function.

Main Methods:

  • Two pulmonary function tests (PFT) were administered to 20 non-smoking male firemen-divers over an 8-9 year period.

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  • Data were compared to European Coal Steel Community reference values for cross-sectional and longitudinal analyses.
  • Key spirometric parameters including vital capacity (VC), forced expiratory volume in 1 second (FEV1), residual volume (RV), and maximal mid expiratory flow (MMEF) were analyzed.

    • Main Results:

    • Participants exhibited higher vital capacity (VC) and forced expiratory volume in 1 second (FEV1) and lower residual volume (RV) in both PFT assessments.
    • Longitudinal analysis revealed a slower VC decline compared to FEV1 decline, resulting in a decreased FEV1/VC ratio over time.
    • Maximal mid expiratory flow (MMEF) and MMEF/VC showed a pronounced decrease, indicating potential chronic small airway effects.

    Conclusions:

    • Hyperbaric stimulus may partially counteract age-related decline in vital capacity (VC) in firemen-divers.
    • A decrease in FEV1/VC ratio suggests obstructive changes may occur with prolonged diving experience.
    • The pronounced MMEF decline points to possible chronic small airway impairment due to diving.