Crackles - Low Pitched (Rales) Auscultation Reference

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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.

Lowed pitched crackles (rales) are discontinuous lung sounds that are similar to the sounds of hook and loop fasteners being pulled apart.

As you listen to this sound, observe the waveform. This is a graph of sound amplitude (loudness) on the vertical axis vs time on the horizontal axis.


Additional Listening Tips

Lowed pitched crackles are discontinuous sounds that are similar to the sounds of hook and loop fasteners being pulled apart.

Auscultation Method

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



Relevant Courses

If you wish to review a complete mobile concerning Crackles - Low Pitched (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 - Low Pitched (Rales) Auscultation Reference