Pulmonary edema

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Pulmonary edema

Can be divided into two main categories, hydrostatic and non-hydrostatic.

  • Normal pulmonary capillary wedge pressure 6-12 mm Hg
  • Redistribution of the pulmonary blood flow 16-19 mm Hg
  • Interstitial edema 20-25 mm Hg
  • Alveolar edema 25-30 mm Hg

  • Kerley A lines centrally radiating from hila
  • Kerley B lines peripherally


Secondary to increased venous pressure.

Edema will spare a lobe with pulmonary embolus or emphysema. Mitral valve regurgitation may cause right upper lobe edema mimicing pneumonia.


Secondary to increased capillary permeability.

Causes incluse: