Experimental animal study reveals turbulence causes Korotkoff sounds independent of vessel walls in anesthetized canines, suggesting fluid dynamics generate blood pressure sounds.
Korotkoff sounds were produced in anesthetized dogs and studied in detail. The change in the pattern of blood flow was demonstrated by cinefluorographic technique. Various mechanisms producing Korotkoff sounds are discussed. It was demonstrated that heart sounds and Korotkoff sounds are distinct and separate entities since they are separable in time and are differently influenced by changing the site of the sensing element. These experiments demonstrate that turbulence occurred in flow (corresponding with Korotkoff sounds) despite the fact that the calculated Reynolds numbers were low. The vessel wall is not necessary to the production of Korotkoff sounds.
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D. Chungcharoen (1964) studied this question.
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