Pulmonary alveolar oedema

Pulmonary alveolar oedema is a particular pattern of pulmonary oedema where most of fluid build up is into the alveolar spaces. The onset of alveolar edema may also be associated with direct pressure-induced damage to the alveolar epithelium. It can sometimes have a central peri-hilar pattern. Alveolar pulmonary oedema often preceded by interstitial pulmonary oedema and usually develops once the pulmonary venous pressure exceeds 30 mmHg 2

Radiographic features

Plain radiograph

On chest radiographs, there are often bilateral opacities that demonstate extend in a fan shape outward from the hilum in a ‘batwing’ pattern. With worsening alveolar oedema, the lung opacification can become increasingly homogenous. Air bronchograms can be seen with alveolar oedema 2.

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Article Information

rID: 41344
System: Chest
Synonyms or Alternate Spellings:
  • Alveolar oedema
  • Pulmonary alveolar edema
  • Alveolar edema
  • Alveolar flooding
  • Alveolar pulmonary oedema
  • Pulmonary alveolar oedema

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