MCQ – 4643

Shock lung is characterized by –

Correct Answer � D Explanation

Ans. D. Diffuse alveolar damage

Diffuse alveolar damage

Make it clear that shock lung is a synonym for acute respiratory distress syndrome, diffuse alveolar damage acute alveolar injury, and acute lung injury.

• Shock lung = ARDS = Diffuse alveolar damage = Acute alveolar injury = acute lung injury 

Pathology) Acute stage

• The lungs are heavy firm, red and boggy and exhibit congestion, interstitial and interalveolar edema, inflammation, and fibrin deposition.
• The alveolar walls become lined with waxy hyaline membranes that are morphologically similar to those seen in hyaline membrane disease of neonates.
• The hyaline membrane contains fibrin rich edema fluid mixed with the cytoplasmic and lipid remnants of necrotic
• epithelial cells.

ii) Organizing stage – In this stage type II epithelial cells undergo proliferation in an attempt to regenerate the alveolar lining.

iii) Resolution – Resolution is unusual