What question did this study set out to answer?

To identify the physical origin and acoustic properties of the Korotkoff sounds utilized in clinical sphygmomanometry.

February 1, 1967Circulation ResearchOpen Access

Korotkoff Sounds

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To identify the physical origin and acoustic properties of the Korotkoff sounds utilized in clinical sphygmomanometry.
Monitored blood flow and arterial movement under a sphygmomanometer cuff using a Doppler flow detection device.
Evaluated arterial geometry and lumen deformation using cineangiograms and vessel casts, comparing in situ arteries to externally compressed rubber tubes.
Korotkoff sounds consist of an initial transient (Ki) caused by abrupt arterial wall acceleration at flow onset and a prolonged compression murmur (Kc) driven by downstream turbulence.
Sound muffling occurs primarily from the attenuation of frequencies between 60 and 180 cycles/sec as the initial transient ceases, leaving only the compression murmur.
Compressed arteries taper smoothly and exhibit decreased circumference under reduced transmural pressure, whereas rubber tubes flatten into an unstable binodal shape.

Structured PICO

Population

Experimental models including arteries in situ and rubber tubes

Intervention

Doppler flow detection device, cineangiograms, and casts of arteries

Comparator

Rubber tubes (compared to arteries in situ)

Outcome

Genesis and components of Korotkoff sounds (initial transient K_i and compression murmur K_c)surrogate

Provides physiological insight into the components of Korotkoff sounds and demonstrates that rubber tubes are inadequate models for studying their genesis compared to arteries in situ.

Discussion

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Implication

Challenges rubber tube models for Korotkoff research; leaves open applicability to human arterial compression and auscultatory BP measurement.

Cite This Study

McCutcheon et al. (1967) studied this question.

synapsesocial.com/papers/6a7431ddc0dd22c6076e886d https://doi.org/10.1161/01.res.20.2.149

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Implication

Challenges rubber tube models for Korotkoff research; leaves open applicability to human arterial compression and auscultatory BP measurement.

Korotkoff Sounds

Key Points

Structured PICO

Discussion

Implication

Cite This Study

Korotkoff Sounds

Key Points

Structured PICO

Discussion

Implication

Cite This Study

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