The time-dependent pressure curves of a pulsatile flow across rigid and pulsating stenoses were investigated experimentally in a laboratory simulator of the outflow tract of the heart right ventricle. The experiments were performed within the range of physiological conditions of frequency and flow rate. The experimental setup consisted of a closed flow system which was operated by a pulsatile pump, and a test chamber which enabled checking different modes of stenosis. Rigid constrictions were simulated by means of axisymmetric blunt-ended annular plugs with moderate-to-severe area reductions. The pulsating stenosis consisted of a short starling resistor device operated by a pulsating external pressure which was synchronized by the pulsatile flow. It was found that the shape of the time-dependent pressure curve upstream of the stenosis was different in the case of rigid stenosis than in the pulsating one. Potential clinical applications of the work may relate to diagnosis of the type of stenosis in the congenital heart disease known as Tetralogy of Fallot.
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November 1984
Research Papers
An Experimental Study of Pressure Losses in Pulsatile Flows Through Rigid and Pulsating Stenosis
R. Rabinovitz,
R. Rabinovitz
Technion—Israel Institute of Technology, Haifa, Israel
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D. Degani,
D. Degani
Technion—Israel Institute of Technology, Haifa, Israel
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C. Gutfinger,
C. Gutfinger
Technion—Israel Institute of Technology, Haifa, Israel
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S. Milo
S. Milo
Department of Cardiac Surgery, Sheba Medical Center, Tel-Hashomer, Israel
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R. Rabinovitz
Technion—Israel Institute of Technology, Haifa, Israel
D. Degani
Technion—Israel Institute of Technology, Haifa, Israel
C. Gutfinger
Technion—Israel Institute of Technology, Haifa, Israel
S. Milo
Department of Cardiac Surgery, Sheba Medical Center, Tel-Hashomer, Israel
J Biomech Eng. Nov 1984, 106(4): 309-314 (6 pages)
Published Online: November 1, 1984
Article history
Received:
December 22, 1983
Revised:
February 22, 1984
Online:
June 15, 2009
Citation
Rabinovitz, R., Degani, D., Gutfinger, C., and Milo, S. (November 1, 1984). "An Experimental Study of Pressure Losses in Pulsatile Flows Through Rigid and Pulsating Stenosis." ASME. J Biomech Eng. November 1984; 106(4): 309–314. https://doi.org/10.1115/1.3138499
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