Tuesday, November 25, 2014

Acute tension pneumothorax is commonly associated with:

Acute tension pneumothorax is commonly associated with:

a. Facial flushing.
b. Hypotension and vagally mediated bradycardia.
c. Ventricular fibrillation-induced cardiac arrest.
d. Right axis deviation on electrocardiogram.
e. Hyperresonance to percussion on the affected side.


The answer is e. Tension pneumothorax is characterized by dyspnea, hypotension, decreased venous return to the heart, midline shift of the trachea and mediastinal structures away from the side of tension, a hyperresonant ercussion note, and tachycardia. Untreated tension pneumothorax can quickly deteriorate to cardiac arrest andpulseless electrical activity. Although sometimes clinically indistinguishable from tamponade, a tensionpneumothorax is the more common occurrence and a clinical diagnosis is usually possible. Treatment is needledecompression followed by tube thoracostomy.

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