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Adventitious Breath Sounds: Wheezes, Crackles, Rhonchi, Friction Rub
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Terms in this set (6)
Fine Crackles (Rales)
Occurrence: End inspiration, do not clear with
cough.
Quality: High-pitched, short, crackling.
Causes: Collapsed or fluid-filled alveoli open.
Coarse Crackles (Rales)
Occurrence: End inspiration, do not clear with
cough.
Quality: Loud, moist, low-pitched, bubbling.
Causes: Collapsed or fluid-filled alveoli open.
Wheezes (sibilant wheezes)
Occurrence: Expiration/inspiration when severe.
Quality: High-pitched, continuous.
Causes: Blocked airflow as in asthma, infection,
foreign body obstruction.
Rhonchi (sonorous wheezes)
Occurrence: Expiration/inspiration
change/disappear with cough.
Quality: Low-pitched, continuous, snoring, rattling.
Causes: Fluid-blocked airways.
Stridor
Occurrence: Inspiration.
Quality: Loud, high-pitched crowing heard without
stethoscope.
Causes: Obstructed upper airway.
Friction Rub
Occurrence: Inhalation/exhalation.
Quality: Low-pitched grating, rubbing.
Causes: Pleural inflammation.
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