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croup p. 167
labs/findings p. 726
paramyxoviruses p. 164, 166
pulsus paradoxus in p. 477
croup p. 167
croup p. 166
croup p. 167
Croup is a viral respiratory infection most common in young children, usually caused by the parainfluenza virus. It results in the inflammation of the larynx and trachea, which leads to a characteristic barking cough, hoarseness of voice, and inspiratory stridor. The diagnosis is usually clinical, but can need an x-ray for confirmation. When done, X-rays show a steeple sign, which is subglottic narrowing.
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