Crackles - Coarse (Rales)


Crackles (rales) are caused by excessive fluid (secretions) in the airways. It is caused by either an exudate or a transudate. Exudate is due to lung infection e.g pneumonia while transudate such as congestive heart failure. A crackle occurs when a small airways pop’s open during inspiration after collapsing due to loos excretions or lack of aeration during expiration (atelectasis). Crackles are much more common in inspiratory than in expiratory. Coarse crackles are usually early inspiratory .Coarse crackles are louder, more low pitched and longer lasting. They indicate excessive fluid on the lungs which could be caused by aspiration, pulmonary oedema from chronic heart disease, chronic bronchitis, pneumoni.
Crackles - Coarse (Rales)

Maneuver: Seated
Chestpiece Position: Chest wall
Chestpiece: Diaphragm