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Respiratory sounds, also known as lung sounds or breath sounds, are the specific sounds generated by the movement of air through the respiratory system. [1] These may be easily audible or identified through auscultation of the respiratory system through the lung fields with a stethoscope as well as from the spectral characteristics of lung sounds. [2]
The terminology of rales and rhonchi in English remained variable until 1977, when a standardization was established by the American Thoracic Society and American College of Chest Physicians. [6] As a result, the term râles was abandoned, and crackles became its recommended substitute.
Chest X-rays may show air in the mediastinum, the middle of the chest cavity. [5] A significant case of subcutaneous emphysema can be detected by touching the overlying skin, which will feel like tissue paper or Rice Krispies. [8] Touching the bubbles causes them to move and sometimes make a crackling noise. [9]
Signs and symptoms include crepitus (a crunching sound made when broken bone ends rub together), [1] pain, tenderness, bruising, and swelling over the fracture site. [4] The fracture may visibly move when the person breathes, and it may be bent or deformed, [4] potentially forming a "step" at the junction of the broken bone ends that is detectable by palpation. [3]
Researchers said on Wednesday they have settled the issue of what occurs inside knuckles to trigger the familiar popping sound. Snap, crackle, pop: study reveals secret behind knuckle-cracking ...
Joint cracking is the manipulation of joints to produce a sound and related "popping" sensation. It is sometimes performed by physical therapists, chiropractors, and osteopaths [1] pursuing a variety of outcomes. The cracking of joints, especially knuckles, was long believed to lead to arthritis and other joint problems. However, this has been ...
Air can also be trapped in the mediastinum, the center of the chest cavity (pneumomediastinum). [4] If air escapes from a penetrating injury to the neck, a definite diagnosis of TBI can be made. [10] Hamman's sign, a sound of crackling that occurs in time with the heartbeat, may also accompany TBI. [14]
[8] [9] With more severe contusions, breath sounds heard through a stethoscope may be decreased, or rales (an abnormal crackling sound in the chest accompanying breathing) may be present. [6] [10] People with severe contusions may have bronchorrhea (the production of watery sputum). [11] Wheezing and coughing are other signs. [12]