Which sign is a late indicator of tension pneumothorax?

Which sign is a late indicator of tension pneumothorax?

• A. Tracheal deviation is a late sign
• B. Hypotension is the only early sign
• C. Diminished breath sounds are not helpful
• D. Hyperresonant chest is always early

Answer: (A)

In tension pneumothorax, the pressure in the affected chest rises rapidly, restricting venous return and shrinking the lung. Signs appear in a progression: you often see respiratory distress, tachypnea, tachycardia, and hypoxemia early, sometimes with neck vein distention and diminished breath sounds or hyperresonance. As the condition worsens and mediastinal structures are displaced, tracheal deviation develops, which is a later finding. That's why tracheal deviation is the best choice for a late indicator. The other statements don't fit as timing indicators or clinical usefulness: hypotension tends to occur later as shock progresses, diminished breath sounds are indeed helpful clues rather than not, and hyperresonance isn’t guaranteed to be an early sign in every case.

In tension pneumothorax, the pressure in the affected chest rises rapidly, restricting venous return and shrinking the lung. Signs appear in a progression: you often see respiratory distress, tachypnea, tachycardia, and hypoxemia early, sometimes with neck vein distention and diminished breath sounds or hyperresonance. As the condition worsens and mediastinal structures are displaced, tracheal deviation develops, which is a later finding.

That's why tracheal deviation is the best choice for a late indicator. The other statements don't fit as timing indicators or clinical usefulness: hypotension tends to occur later as shock progresses, diminished breath sounds are indeed helpful clues rather than not, and hyperresonance isn’t guaranteed to be an early sign in every case.