Diffusion disorders. Diffusion capacity of the lungs/Repetitorium

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This article ws checked by pedagogue, but later was changed.

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Concepts assumed[edit | edit source]

  • factors affecting diffusion
  • differences in the diffusion of O 2 , CO 2 and N 2

Diffusion disorders[edit | edit source]

  1. Reduction of the diffusion area (morphological and functional changes of the lungs, pulmonary edema, changes in the ratio of ventilation and perfusion).
  2. Changes in the diffusion path (pulmonary fibrosis, pulmonary edema - asthma cardiale ), "alveolar block".
  3. Reduction of the alveolo-capillary pressure gradient (changes in the partial pressures of gases, alveolar hypoventilation, uneven ventilation).

Diffusion capacity of the lungs (D L ) – transfer factor[edit | edit source]

Measurement methods[edit | edit source]

  1. for oxygen: D LO2 = V O2 / Pa O2 (norm. 25–30 ml/min/mmHg)
  2. for carbon monoxide : D LCO = V CO / PA CO , D LO2 = D LCO · 1.23
  • Advantages of determining diffusion capacity using CO.
  • Clinical interpretation of lung diffusion capacity values.
  • Dependence of lung diffusion capacity values ​​on V'/Q' unevenness.

Links[edit | edit source]

Related articles[edit | edit source]

Source[edit | edit source]