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Physiological changes in respiratory function associated with ageing.

J P Janssens1, J C Pache, L P Nicod

  • 1Dept of Geriatrics, Geneva University Hospital, Switzerland.

The European Respiratory Journal
|June 3, 2000
PubMed
Summary
This summary is machine-generated.

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Physiological lung aging causes airspace enlargement and reduced elastic recoil, impacting breathing mechanics. Despite these changes, the respiratory system generally maintains adequate gas exchange throughout life.

Area of Science:

  • Pulmonary physiology
  • Geriatric respiratory medicine

Background:

  • Aging leads to structural and functional lung changes, including alveolar dilatation and decreased elastic recoil.
  • These changes affect respiratory mechanics, increasing the work of breathing and altering expiratory flow rates.

Purpose of the Study:

  • To detail the physiological changes in the aging respiratory system.
  • To assess the impact of aging on gas exchange and respiratory reserve.

Main Methods:

  • Review of physiological changes associated with lung aging.
  • Analysis of alterations in lung volumes, elastic recoil, and gas exchange parameters.

Main Results:

  • Aging results in enlarged airspaces, reduced surface area for gas exchange, and decreased lung recoil.

Related Experiment Videos

  • Ventilation-perfusion mismatch increases, and expiratory flow rates decline.
  • Despite reduced respiratory reserve and blunted responses to stimuli, gas exchange remains adequate at rest and during exertion.

    • Conclusions:

    • Physiological aging of the lung leads to predictable changes that impact respiratory function.
    • The aging respiratory system has diminished reserves, increasing vulnerability during illness.
    • Reduced sensitivity to hypoxia and hypercapnia can delay diagnosis of respiratory conditions in older adults.