Question

An otherwise healthy young man presented with sudden onset of breathlessness which was increasing rapidly. On examination, it was found that the left chest movement was grossly restricted, breath sounds were absent, and the percussion note was tympanitic. The most likely diagnosis is

• A. Tension pneumothorax
• B. Simple pneumothorax
• C. Bronchial asthma
• D. Cardiac asthma

Hint:

Rapidly worsening breathlessness with a silent, tympanitic hemithorax points to a building pressure, not just trapped air.

Answer 1

The Correct Option is A

Step 1: Note the key findings.
The patient has sudden, rapidly worsening breathlessness, restricted movement on one side of the chest, absent breath sounds on that side, and a tympanitic percussion note. Tympanitic percussion means there is air, not fluid or solid tissue, filling the pleural space.

Step 2: Think about what causes air to fill one side of the chest.
Air can enter the pleural space when the lung surface or chest wall tears, letting the lung collapse away from the chest wall. This is a pneumothorax. The one-sided absent breath sounds and restricted movement confirm the left lung is not functioning.

Step 3: Decide between simple and tension pneumothorax.
In a simple pneumothorax, air enters the pleural space but does not keep building up, so the breathlessness usually does not escalate this rapidly in an otherwise fit young man. In a tension pneumothorax, a one-way valve effect lets air enter the pleural space with every breath but not escape, so pressure builds up fast, collapsing the lung further and pushing on the heart and the other lung. This produces exactly the rapidly worsening breathlessness described.

Step 4: Rule out the other options.
Bronchial asthma (C) causes wheeze with prolonged expiration, not absent breath sounds and tympanitic percussion on one side. Cardiac asthma (D) is breathlessness from left heart failure with bilateral crepitations and wheeze, not a one-sided silent, tympanitic chest. Neither fits this picture.

Step 5: Final answer.
\[ \boxed{\text{Tension pneumothorax}} \]