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Related Experiment Videos

The Korotkoff sound.

G M Drzewiecki1, J Melbin, A Noordergraaf

  • 1Department of Biomedical Engineering, College of Engineering, Rutgers University, Piscataway, NJ 08855-0909.

Annals of Biomedical Engineering
|January 1, 1989
PubMed
Summary
This summary is machine-generated.

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This study proposes that Korotkoff sounds, crucial for blood pressure measurement, arise from nonlinear properties of the brachial artery. These properties distort pressure pulses, generating audible sounds detected by stethoscopes.

Area of Science:

  • Biomedical Engineering
  • Cardiovascular Physiology
  • Acoustics

Background:

  • The auscultatory method for blood pressure measurement relies on detecting Korotkoff sounds.
  • Understanding the mechanisms of Korotkoff sound generation is essential for accurate blood pressure readings.

Purpose of the Study:

  • To propose a theory explaining the generation of Korotkoff sounds.
  • To develop a mathematical model for computing Korotkoff sounds.

Main Methods:

  • Formulated a mathematical model based on nonlinear pressure-flow relationships and arterial compliance.
  • Simulated sound generation using the developed model.

Main Results:

  • The proposed theory attributes Korotkoff sound generation to nonlinearities in the collapsible brachial artery segment.

Related Experiment Videos

  • The mathematical model quantitatively predicts key features of Korotkoff sounds found in literature.
  • Identified energy shift from the normal pressure pulse to the audible range.

    • Conclusions:

    • Nonlinear properties of the brachial artery under a cuff are the primary cause of Korotkoff sounds.
    • The developed model provides a quantitative basis for understanding auscultatory blood pressure measurement.
    • This work offers a new perspective on the physics of Korotkoff sound generation.