Rhonchi can either come and go on and inhale or exhale or be heard continuously. These sounds are produced when there is something blocking the airway, like fluid. The sound you hear is the the sound the air makes as it moves around the blockage. Listen to rhonchi here on the Medzcool YouTube channel. Rales are a higher-pitched sound sometimes called crackles or bibasilar crackles. The terms rales or crackles have been used interchangeably and are usually a matter of preference, not a difference in the condition.
These sounds are formed when air moves into closed spaces. This usually occurs in the smaller parts of the lungs, like the alveoli. These are tiny sacs of air and inflate and deflate with each breath. When these tiny sacs are damaged or weighed down with fluid or mucus, they can make a crackling sound as they attempt to fill with air. Rales are usually broken up into more specific types, based on the way they sound.
Types of rales include:. Listen to rales here on the Medzcool YouTube channel. It can be difficult to differentiate abnormal lung sounds from one another — and it can be just as tricky to find out what is causing these sounds.
While both sounds can be caused by infections and fluid buildup in the lungs, there are a few conditions that are more unique to each sound. You may undergo imaging studies including:. If these abnormal lungs are detected, a healthcare professional will try to determine the exact cause.
Log In Join Ausmed. Start my Subscription. Log In. Sign Up. Online CPD Articles. Document 4m of CPD. Test Your Knowledge Subscribers Only. Sonorous wheezes. Sibilant wheezes. Fine crackles. Course crackles. Lung sounds made easy. Easy Auscultation. Rhonchi lung sounds training. Crackles lung sounds. Thoracic Key. Adventitious sounds: Crackles. Law C. Recognition, prevention, and management of sputum retention. Nurs Times. PMID: Michigan Medicine. Albuterol inhalation.
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They are caused by air moving through airways narrowed by constriction or swelling of airway or partial airway obstruction. They are often heard continuously through both inspiration and expiration and have a musical quality. These wheezes occur when airways are narrowed, such as may occur during an acute asthmatic attack. Secretions in large airways, such as occurs with bronchitis, may produce these sounds; they may clear somewhat with coughing.
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