Crackles - Fine (Rales) Auscultation Reference

Unlock quizzes, lessons and more.

Sign Up
heart lung sounds waveform patient normal speed
heart lung sounds waveform patient half speed

Lesson

For heart sounds listen to the synthetic sound while reviewing this lesson.

Fine crackles are brief, discontinuous, popping lung sounds that are high-pitched. Fine crackles are also similar to the sound of wood burning in a fireplace, or hook and loop fasteners being pulled apart or cellophane being crumpled.

Crackles, previously termed rales, can be heard in both phases of respiration. Early inspiratory and expiratory crackles are the hallmark of chronic bronchitis. Late inspiratory crackles may mean pneumonia, CHF, or atelectasis.

The waveform(s) seen above are a chart of sound amplitude (loudness) on the vertical axis against time on the horizontal axis.


Listening Tips

A summary of the key aspects of this heart or lung sound.
Rales are brief, discontinuous, popping sounds that are high-pitched. Similar to wood burning in a fireplace. More commonly heard during inspiration.

Auscultation Method

maneuver
The recommended patient position is seated
torso
For this sound, use stethoscope's diaphragm The recommended auscultation position for the stethoscope is anterior-3l



Relevant Courses

If you wish to review a complete mobile concerning Crackles - Fine (Rales) Auscultation Reference and related heart sounds, the modules(s) listed below may be useful. Each lesson includes text that explains the auscultatory sound and its clinical significance. The lesson also includes an audio track for playback. A waveform provides a great way to visualize the sounds. Finally, we also include an animation video. For heart sounds, the video illustrates heart muscle and valve movements along with blood flow. For lung sounds, the primary source of the sounds can be seen. Each module also includes a quiz.

Crackles - Fine (Rales) Auscultation Reference







mededu company logo

This website is intended for use by medical professionals for educational purposes only. For medical care, contact a healthcare provider. Copyright 2020 © Medical Training and Simulation LLC. All Rights Reserved.

About | Privacy Policy | Email