The analysis of heart valve dysfunction and effectiveness of disc-designed prostheses

• Autorzy: Shilko S. V. , Hizhenok V. F. , Kuzminsky Yu. G. , Salivonchik S. P.
• Języki publikacji: EN

Abstrakty

EN

The function of heart (in good condition and in poor condition) and hemodynamic characteristics of mechanical prosthetic cardiac valves influencing hemolysis and blood coagulation have been investigated. The solid-state models of disc-designed prosthetic cardiac valves have been constructed. The finite element analysis of blood velocity and pressure at direct and inverse blood flows has shown better characteristics of bi-leaflet valves. The advantage of the numerical modelling is in the possibility of thorough description of blood flow with determination of turbulence and depression zones for different sizes, curvature and ultimate opening angle of leafs. It allows minimising hydraulic resistance, thrombus formation and hemolysis-preserving high reliability of valve closing. The individual design of valve is discussed and aimed at improving a valve function by creating the blood flow twisting.

Słowa kluczowe

EN

heart; finite element method; hemodynamics; hemolysis; thrombus formation; aortic valve

PL

serce; metoda elementów skończonych; zastawka aorty

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Acta of Bioengineering and Biomechanics
• Rocznik: 2003
• Tom: Vol. 5, nr 2
• Strony: 53--62
• Opis fizyczny: Bibliogr. 9 poz., rys., tab., wykr.

Twórcy

autor

Shilko S. V.

• V.A. Belyi Metal-Polymer Research Institute of National Academy of Sciences of Belarus, 32a Kirova Street, 246050, Gomel, Belarus

autor

Hizhenok V. F.

• V.A. Belyi Metal-Polymer Research Institute of National Academy of Sciences of Belarus, 32a Kirova Street, 246050, Gomel, Belarus

autor

Kuzminsky Yu. G.

• V.A. Belyi Metal-Polymer Research Institute of National Academy of Sciences of Belarus, 32a Kirova Street, 246050, Gomel, Belarus

autor

Salivonchik S. P.

• Gomel Regional Clinical Cardiological Dispensary, Medgorodok, 246012, Gomel, Belarus

Bibliografia

• [1] Хирургия сердца (in Russian), под ред. Ю.П. Островского, Минск, 1999.
• [2] BLUESTEIN D., LI Y.M., KRUKENKAMP I.B., Free emboli formation in the wake of bi-leaflet mechanical heart valves and the effects of implantation techniques, J. Biomechanics, 2002, 35, 1533–1540.
• [3] АЛЬТШУЛЬ А.Д., Гидравлические сопротивления (in Russian), Москва, Недра, 1970.
• [4] LIM W.L., CHEW Y.T., CHEW T.C., LOW H.N., Steady flow dynamics of prosthetic aortic heart valves: a comparative evaluation with PIV techniques, J. Biomechanics, 1998, 31, 411–421.
• [5] YURECHKO V.N., KORCHAGIN S.I., RADKEVICH F.A., KUZNETSOVA E.I., FADEEV A.A., Hydro- dynamics of new generation cardiac valve prostheses, Russian J. Biomechanics, 2002, 6(1), 56–68.
• [6] YONG G.L., KRISHNAN B.C., LEMMON J., A numeral simulation of mechanical heart valve closure fluid dynamics, J. Biomechanics, 2002, 35, 881–892.
• [7] FIORE G.B., GRIGIONI M., DANIELE C., AVENIO G.D., BARBARO V., FUMERO R., Hydraulic functional characterization of aortic mechanical heart valve prostheses through lumped-parameter modelling, J. Biomechanics, 2002, 35, 1427–1432.
• [8] ANSYS (1997).
• [9] ТУ РБ 14539033.004-96 (in Russian).