Tag Archive: adventitious sounds

The Sound of Crackles in the Lungs via Stethoscope

Crackles are a common sound auscultated in the lungs. They are also sometimes referred to as crepitations, or rales. Crackles are caused by the sudden openingĀ  of smaller airways and alveoli collapsed by fluid or secretions. Crackles are classified by several different factors. Their pitch and sound characteristics Fine- high pitched and brief Medium Coarse- lower pitched and more prolonged Where they occur in the breathing cycle Inspiratory (common) Expiratory (less common)   A few common causes of crackles include:...
Read More