![]() A noninvasive method of studying arterial disease. Steady flow through veins and collapsible tubes. Development of a Korotkoff sound processor for automatic identification of auscultatory events-Part I: Specification of preprocessing bandpass filters. Loudness, its definition, measurement and calculation. Movements in the artery under compression during blood pressure determinations. Studies in blood pressure estimation by indirect methods. The mechanisms of the compression sounds of Korotkoff. Studies in blood pressure estimation by indirect method Part II. The role of arterial volume compliance in Korotkoff sound generation. Arterial volume and compliance change in Korotkoff sound generation. Handbook of Bioengineering, New York: McGraw-Hill, pp. Noninvasive blood pressure recording and the genesis of Korotkoff sound. System Dynamics Soc., Zuoz, Switzerland, session 9 1986.ĭrzewiecki, G.M. Korotkoff sound intensity and blood pressure. Generalization of the transmural pressure-area relation for the femoral artery. XIII European Congress on Noninvasive Cardiovascular Dynamics, Brescia, Italy, p. Dependence of Korotkoff sound on vascular state. Microfilms, Ann Arbor, MI 48106.ĭrzewiecki, G.M. ![]() 235–238, 1984.ĭrzewiecki, G.M., The Origin of the Korotkoff Sound and Arterial Tonometry. System Dynamics Soc., Philadelphia, PA, pp. Collapsible vessel dynamics and Korotkoff sound. Analytical comparison of transcutaneous pulse recording methods. Steady pressure flow relations in compressed arteries: possible origin of Korotkoff sounds. Pressure-flow relationships in collapsible tubes. Buckling of fluid-filled elastic cylindrical tubes under dynamic pressure. A general theory of the causes of murmurs in the cardiovascular system. Experimental evidence on the mechanism for the instability of flow in collapsible vessels. Theory of steady flow in collapsible tubes and veins. ![]() Pressure-flow characteristics of collapsible tubes: A reconciliation of seemingly contradictory results. Comparison of direct and indirect arterial pressure measurements in hospitalized patients. The relation of pulse form to sound production in arteries, Part I: the form of the sphygmogram during compression. The change in form of the pulse wave in the course of transmission. Unstable equilibrium behaviour in collapsible tubes. Finite amplitude waves in fluid-filled elastic tubes: wave distortion, shock waves and Korotkoff sounds. Noninvasive measurement of the arterial pressure contour in man. Korotkoff sounds at diastole-a phenomenon of dynamic instability of fluid-filled shells. Criteria in the choice of an occluding cuff for the indirect measurement of blood pressure. ![]() Several earlier theories are summarized and evaluated.Īlexander, H. The model is able to predict quantitatively a range of features of the Korotkoff sound reported in the literature. A mathematical model is formulated to represent the structures involved and to computer the Korotkoff sound. The pressure transient produced is transmitted to the skin surface and stethoscope through deflection of the arterial wall. The rising portion of a normal incoming brachial pressure pulse is distorted due to these characteristics, and energy contained in the normal pulse is shifted to the audible range. In this article, a theory is proposed that identifies the cause of sound generation with the nonlinear properties of the pressure-flow relationship in, and of the volume compliance of the collapsible segment of brachial artery under the cuff. As the auscultatory method of blood pressure measurement relies fundamentally on the generation of the Korotkoff sound, identification of the responsible mechanisms has been of interest ever since the introduction of the method, around the turn of the century.
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