Question 1 · Medium
After a highway collision, a 27-year-old pillion rider is brought to casualty gasping, with pulse 128/min, BP 82/50 mmHg and SpO2 85% on oxygen. The trachea is shifted to the left, the neck veins are full, and the right chest is hyper-resonant with absent breath sounds. The casualty medical officer considers four actions: 1. Chest X-ray to confirm the diagnosis before any procedure. 2. Immediate needle or finger decompression of the right pleural space. 3. An intercostal chest drain after decompression. 4. Intubation and positive-pressure ventilation before decompression. Which actions are correct?
- A1, 2, 3 and 4
- B1, 2 and 3 only
- C2, 3 and 4 only
- D2 and 3 only
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Answer: D · 2 and 3 only
Only actions 2 and 3 are correct. Hypotension, distended neck veins and tracheal shift away from a silent, hyper-resonant hemithorax is tension pneumothorax, a clinical diagnosis treated in the breathing step of the primary survey by immediate decompression (in adults, ATLS 10th edition advises the 5th intercostal space just anterior to the mid-axillary line), followed by an intercostal chest drain. Action 1 is wrong because waiting for an X-ray in a shocked patient can be fatal. Action 4 is wrong because positive pressure forces more air into the pleural space and can precipitate cardiac arrest.
- A: Includes both the delaying X-ray and intubation before decompression.
- B: Includes the confirmatory X-ray, which delays life-saving decompression.
- C: Includes intubation before decompression, which worsens the tension.