Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
권호 표지

Impact Behavior Analysis of Mechanical Monoleaflet Heart Valve Prostheses in the Opening Phase

  • Published : 1992.09.01
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Abstract

In this paper, fluttering behavior of mechanical monoleaflet tilting disc heart valve prostheses during the opening phase was analyzed taking into consideration the impact between the occluder and the guiding strut at the fully open position. The motion of the valve occluder was modeled as a rotating system, and equations were derived by employing the moment equilibrium principle. Forces due to lift, drag, gravity and buoyancy were considered as external forces acting on the occluder. The 4th order Runge-Kutta method was used to solve the governing equations. The results iimonstrated that the occludes reaches steady equilibrium position only after damped vibration. Fluttering frequency varies as a function of time after opening and is in the range of 8-84 Hz. Valve opening appears to be affected by the orientation of the valve relative to gravitational force. The opening velocities are in the range of 0.65-1.42m/sec and the dynamic loads by impact of the occludes and the strut are in the range of 90-190 N.

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References

  1. Ame. Heart J. v.101 Echocardiographic features of the correctly functioning St. Jude medical valve prosthesis Amann F.W.;Burckhardt D.;Hasse J.;Gradel E.
  2. (2nd ed) Vector Mechanics for Engineering : Dynamics Beer F.P.;Johnston E.R.
  3. (2nd ed), Van Nostrand Reinhold Flow-Induced Vibration Blevins R.D.
  4. Applied Numerical Methods Carnahn B.;Luther H.A.Wilkes J.O.
  5. Amer. J. Cardiology v.49 Noninvasive in Vivo and in Vitro Study of the St. Jude Mitral Valve Prosthesis Feldman H.J.;Gray R.J.;Chaux A.;Halpern S.W.;Kraus R.;Allen H.N.;Matloff J.M.
  6. J. of Biomechanics v.10 An Analysis of the Hemodynamics of the Opening of Aortic Valves Hung T.K.;Schuessler G.B.
  7. J. of Biomechanics v.17 A Mathematical Study of Semilunar Valve Vibration Maxumdar J.;Knight D.W.
  8. J. of Computational Physics v.10 Flow Pattern Around Heart Valves : A numerical Method Peskin C.S.
  9. J. of Biomechanics v.21 Dynamic Analysis of Flutter in Disk Type Mechanical Heart Valve Prostheses Prabhu A.A.;Hwang N.H.C.
  10. J. of Biomechanics v.19 Estimation of the Abrasive Wear Coefficient in Lillehei-Kaster Cardiac Valve Prostheses Reif T.H.;Silver M.D.;Koppenhoefer H.;Huffstutler M.C.
  11. ASME J. of Biomechanical Engineering v.112 Estimation of the Rotational Undamped Natural Frequency of Bileaflet Cardiac Valve Prostheses Reif T.H.;Schulte T.J.;Hwang N.C.H.
  12. ASME J. of Biomechanical Engineering v.108 Faatigue Life estimation Procedures for the Endurance of a Caardiac valve Prosthesis : Stress/Life and Damage-Tolerant Analyses Ritchie R.O.;Lubock P.
  13. Annals of Biomedical Engineering v.10 Bioengineering Aspects of Heart Valve Replacement Schoen F.J.;Titus J.L.Lawrie G.M.
  14. J. of Biomechanics v.17 A Mathematical Model of Aortic Valve Vibration Sikarskie D.L.;Stein P.D.;Vable M.
  15. Theory of Vibration with Applications(3rd ed) Thomson W.T.
  16. Heart Valve Engineering Unsworth A.;Drury P.J.
  17. Impact Dynamics Zukas J.(et al.)