Pulmonary alveolar edema

Pulmonary alveolar edema is a particular pattern of pulmonary edema 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 edema often preceded by interstitial pulmonary edema 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 edema, the lung opacification can become increasingly homogenous. Air bronchograms can be seen with alveolar edema 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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Cases and figures

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  • Case 2
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