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Crackles - Coarse (Rales) Reference Guide

Crackles - Coarse (Rales)

Coarse crackles are discontinuous, brief, popping lung sounds. Compared to fine crackles they are louder, lower in pitch and last longer. They have also been described as a bubbling sound. You can simulate this sound by rolling strands of hair between your fingers near your ear.


Patient Recording

patient heart or lung sound
Crackles - Coarse (Rales)


Patient Recording - Half Speed Playback

patient heart or lung sound
Crackles - Coarse (Rales)


Position

Patient position
The patient's position should be seated.

Listening Tips

Features:Course crackles are discontinuous, brief, popping sounds. Similar to the sound of a hook and loop fastener being pulled apart. They have also been described as a bubbling sound. More common during inspiration


Waveform (Phonocardiogram)



Crackles - Coarse (Rales) | Description, Audio and Animations | #73

Authors and Reviewers

Authored by Dr. Jonathan Keroes, MD and Diane Wrigley, PA.
Medically reviewed by Dr. Barbara Erickson, PhD, RN, CCRN.
Last Update: 12/06/2021

Sources


Sources



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