Ronchi, or crackles, are the gurgling noises heard on auscultation of the lungs with a stethescope during inhalation or exhalation. The sounds are caused by the flow of air through thick mucous secretions in the larger air passages such as the bronchioles but can also be associated with smaller structures such as the alveoli

Ronchi can be heard in patients with COPD, or chronic obstructive pulmonary disorder, Acute Bronchitis, and Severe Bronchitis. COPD is an all inclusive syndrome that stems from the reduction of surface are associated with emphysema and the production of mucous secretions, bronchospasm and inflammation associated with bronchitis.

See also

• Wheeze
• Rales