Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

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

Dynamic Behavior Analysis of Mechanical Bileaflet Heart Valve Prosthesis

기계식 이엽심장밸브의 동적거동 해석

  • 천길정 (원광대학교 공과대학 기계공학과)
  • Published : 1991.09.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, fluttering behavior of mechanical bileaflet heart valve prosthesis was analyzed taking into consideration of the impact between valve plate and stopper Vibration system of the valve was modeled as a rotating system, and equations are induced by moment equilibrium equations. Lift force, drag force, gravity and buoyancy were considered as external forces acting on the valve plate/ The 4th order Runge-Kutta method was used to solve the equations. Valve plate does not come to the static equilibrium position at a stretch, but come to that position after under damping vibration. Damping ratio increases as the cardiac optput increases, and the mean damping ratio is in the range of 0.16~40.25. Fluttering frequency does not have any specific value, but varies as a function of time. It is in the range of 10~40Hz. Valve opening appears to be affected by the orientation of the of the valve relative to gravitational forces.

Keywords

References

  1. Annals of Biomedical Engineering v.10 Bioengineering Aspects of Heart Valve Replacement F.J.Schoen;J.L.Titus;G.M.Lawrie
  2. Heart valve Engineering A.Unsworth;P.J.Drury
  3. J. of Biomechanics v.17 no.11 A Mathematical Model of Aortic Valve Vibration D.L.Sikarskie;P.K.Stein;M.Vable
  4. J. of Biomechanics v.17 no.8 A Mathematical Study of Semilunar Valve Vibration J.Mazumdar;D.W.Knight
  5. J.of Biomechanics v.10 An Analysis of the Hemodynamics of the Opening of Aortic Valves T.K.Hung;G.B.Schuessler
  6. J. of Computational Physics v.10 Flow Pattern Around Heart Valves: A Numerial Method C.S.Peskin
  7. J. of Biomechanics v.19 no.2 Estimation of the Abrasive Wear Coefficient in Lillehei-Kaster Cardiac Valve Prostheses T.H.Reif(et al.)
  8. J. of Biomechanics v.21 no.7 Dynamic Analysis of Flutter in Disk Type Mechanical Heart Valve Prostheses A.A.Prabhu;N.H.C.Hwang
  9. ASME J. of Biomechanical Engineering v.112 Estimation of the Rotational Undamped Natural Frequency of Bileaflet Cardiac Valve Prostheses T.H.Reif;T.J.Schulte;N.C.H.Hwang
  10. Vector Mechanics for Engineers : Dynamics'(2nd ed.) F.P.Beer;E.R.Johnston
  11. Flow-Induced Vibration'(2nd ed.) R.D.Blevins
  12. Applied Numerical Methods B.Carnahan;H.A.Luther;J.O.Wilkes
  13. Mechanical Vibration Analysis and Computation D.E.Newland
  14. Amer. J. Cardiology v.49 Noninvasive in Vivo and in Vitro Study of the st. Jude Mitral Valae Prosthesis H.J.Feldman(et al.)