What respiratory sound is commonly associated with fluid in the alveoli?

Rales, also known as crackles, are the respiratory sounds commonly associated with fluid in the alveoli. These sounds are typically heard when a healthcare provider listens to a patient's lungs with a stethoscope. Rales indicate that there is moisture or fluid in the small air sacs of the lungs (alveoli), often suggesting conditions such as pulmonary edema, pneumonia, or congestive heart failure.

The "crackling" sound is created by the opening of small airways and the movement of fluid during breathing. This sound is distinct from wheezing and rhonchi, which are typically associated with airway obstruction or larger airway conditions. Recognizing these sounds is crucial in assessing a patient's respiratory status and identifying potential underlying issues related to fluid accumulation in the lungs.