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Lung function study and diffusion capacity in anorexia nervosa.

T Pieters1, B Boland, C Beguin

  • 1Pneumology Unit, General Internal Medicine Division and Medical Information Division, Cliniques Universitaires Saint-Luc, Avenue Hippocrate 10 B-1200 Brussels, Belgium.

Journal of Internal Medicine
|August 18, 2000
PubMed
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Pulmonary function tests in anorexia nervosa show normal diffusion capacity but reduced respiratory muscle strength and increased residual volume. These findings do not support starvation-induced pulmonary emphysema in humans.

Area of Science:

  • Pulmonary Medicine
  • Nutritional Science
  • Respiratory Physiology

Background:

  • Malnutrition affects respiratory drive, muscle strength, and immune function.
  • Emphysema-like changes are observed in starved animals, but not yet in humans.
  • Anorexia nervosa presents a unique model to study starvation's impact on the lungs.

Purpose of the Study:

  • To investigate the presence of pulmonary emphysema in individuals with anorexia nervosa.
  • To assess lung function, including volumes, ventilatory capacity, and respiratory pressures.
  • To determine if starvation in anorexia nervosa leads to emphysematous changes.

Main Methods:

  • Pulmonary function studies were conducted on 24 women (ages 14-38) with anorexia nervosa.
  • Evaluated lung volumes, ventilatory capacity, maximal respiratory pressures, and transfer factor.

Related Experiment Videos

  • PaO2 levels were also measured.

    • Main Results:

    • Maximal inspiratory and expiratory pressures were decreased (59% and 35% of predicted, respectively).
    • Residual volume was increased (162% of predicted).
    • Diffusion capacity and transfer coefficient remained within normal limits.

    Conclusions:

    • Pulmonary function in anorexia nervosa is largely normal, except for reduced maximal pressures and increased residual volume.
    • Diffusion capacity is not impaired.
    • The study's findings do not support the hypothesis of starvation-induced pulmonary emphysema in anorexia nervosa.