While the first is a disease of bronchioles and lower airway with resulting wheezing and crakles, the second one is inflammation of the larynx, causing stridor and braking cough. Both are caused mainly by a viral infection and both may present at the ED with rhinorrea, coughing, fever and signs of increased work of breathing.
BRONCHIOLITIS QUICK SKETCH NOTES:
CROUP QUICK SKETCH NOTES:
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Sketchbook, MD 