Crackles - Early Inspiratory (Rales) Reference Guide.
Crackles - Early Inspiratory (Rales)Early inspiratory crackles (rales), as suggested by the title, begin and end during the early part of inspiration. The pitch is lower than late inspiratory crackles. A patient's cough may decrease or clear these lung sounds. Early inspiratory crackles suggest decreased FEV1 capacity and are characteristic of COPD.
Patient Recording - Half Speed Playback
The patient's position should be sitting.
Features:Occur early in inspiration. Can be lower pitched than late inspiratory crackles. Coughing may decrease or clear these crackles