What is a key sign of tension pneumothorax?

• A. Beck's triad
• B. JVD and muffled heart sounds
• C. Increasing respiratory distress
• D. Cyanosis and hypotension

Answer: (C)

Tension pneumothorax is a life-threatening condition that occurs when air enters the pleural space and cannot escape, leading to increased pressure on the lungs and mediastinum. One of the key signs of tension pneumothorax is increasing respiratory distress. This is because as the pressure builds in the pleural cavity, it compromises the lung's ability to expand, making it difficult for the patient to breathe effectively.

As the condition progresses, the patient may exhibit rapid breathing and use accessory muscles to assist with breathing, indicating severe respiratory distress. Increased respiratory effort along with signs such as decreased or absent breath sounds on the affected side can help identify this critical condition.

While other signs like cyanosis and hypotension can occur as the condition worsens, they are more indicative of late-stage complications from sustained hypoxia and cardiovascular compromise due to the pressure effects rather than an immediate key sign of tension pneumothorax itself. The signs associated with Beck's triad, which includes jugular venous distension (JVD) and muffled heart sounds, are specifically related to cardiac tamponade rather than tension pneumothorax, making them irrelevant in this context.