In this example, a patient has fine crackles. Such sounds are sometimes associated with congestive heart failure. During early to mid stages of CHF, fine crackles may be heard over the patient's posterior lung bases. Use the slider to reveal the area of the lungs where these crackles originate.
Skin and Ribs


Blended View


Lungs


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Fine crackles are brief, discontinuous, popping lung sounds that are high-pitched. Fine crackles are also similar to the sound of wood burning in a fireplace, or hook and loop fasteners being pulled apart or cellophane being crumpled.

Crackles, previously termed rales, can be heard in both phases of respiration. Early inspiratory and expiratory crackles are the hallmark of chronic bronchitis. Late inspiratory crackles may mean pneumonia, CHF, or atelectasis.