Effect of Fluid Viscosity on Noise of Bileaflet Prosthetic Heart Valve
Background. Numerical simulation and experimental research have been used as powerful tools to understand and predict the behavior and mechanics of the operation of natural heart valves and their prostheses in natural and pathological conditions. Such studies help to evaluate the effectiveness of the valves, their design and the results of surgical procedures, to diagnose healthy and impaired function of the heart valves. There is an actual problem in creating more reliable methods and tools for the operation diagnostics of mechanical heart valves.
Objective. The aim of the research is to investigate the effect of fluid viscosity on the hydroacoustic characteristics of jets that flow from a semi-closed and open mechanical bileaflet heart valve. To study the possibility of using hydroacoustic measuring instruments as diagnostic equipment for determining the working conditions of the bileaflet prosthetic heart valve.
Methods. The experimental research was carried out by means of hydroacoustic measurements of the hydrodynamic noise in the near wake of the side and central jets of the glycerin solution and the pure water flow downstream of the prosthetic bileaflet heart valve.
Results. The effect of fluid viscosity on the hydroacoustic characteristics of the jets that flow from a semi-closed and open mechanical bileaflet heart valve has been experimentally determined. Integral and spectral characteristics of the hydrodynamic noise of jets of the glycerin solution and the pure water flow downstream of the bileaflet mitral heart valve for different fluid rate were detected.Conclusions. In the stream conditions of pure water, the integral characteristics of the pressure field are lower than in stream conditions of the aqueous glycerin solution. As the glycerin concentration in the solution increases, increase average pressures and especially RMS pressure fluctuations. The spectral levels of the hydrodynamic noise in the near wake of the side jet of the glycerin solution are lower than for water flow in the frequency ranges from 1 to 7-8 Hz and from 100 to 1000 Hz for fluid rate 5 l/min. For higher fluid rates, the spectral components of the hydrodynamic noise in the near wake of the side jet of the glycerin solution of the semi-closed mitral valve are higher than that for the pure water. The greatest difference (1.5–1.8 times) in the spectral levels is observed in the frequency range from 10 to 100 Hz for the fluid rate 15 l/min.
A. Kheradvar et al., “Emerging trends in heart valve engineering: Part II. Novel and standard technologies for aortic valve replacement”, Annals Biomed. Eng., vol. 42, no. 4, pp. 1–13, 2014. doi: 10.1007/s10439-014-1191-5
S.H. Rahimtoola, “Choice of prosthetic heart valve in adults an update”, J. Am. Coll. Cardiol., vol. 55, pp. 2413–2426, 2010. doi: 10.1016/j.jacc.2009.10.085
A. Hasan et al., “Biomechanical properties of native and tissue engineered heart valve constructs”, J. Biomech., vol. 47, pp. 1949–1963, 2014. doi: 10.1016/j.jbiomech.2013.09.023
C.M. Hobson et al., “Fabrication of elastomeric scaffolds with curvilinear fibrous structures for heart valve leaflet engineering”, J. Biomed. Mater. Res. A, vol. 103, no. 9, pp. 3101–3106, 2015. doi: 10.1002/jbm.a.35450
Y. Soeta and Y. Bito, “Detection of features of prosthetic cardiac valve sound by spectrogram analysis”, Appl. Acoustics, vol. 89, pp. 28–33, 2015. doi: 10.1016/j.apacoust.2014.09.003
E. Konishi “Additional heart sounds during early diastole in a patient with hypertrophic cardiomyopathy and atrioventricular block”, J. Cardiology Cases, vol. 11, pp. 171–174, 2015. doi: 10.1016/j.jccase.2015.02.010
S. Fortini et al., “Three-dimensional structure of the flow inside the left ventricle of the human heart”, Exp. Fluids, vol. 54, no 11, Article ID 1609, 2013. doi: 10.1007/s00348-013-1609-0
R. Benenstein and M. Saric, “Mitral valve prolapse: role of 3D echocardiography in diagnosis”, Curr. Opin. Cardiol., vol. 27, no. 5, pp. 465–476, 2012. doi: 10.1097/HCO.0b013e328356afe9
J. Toger et al., “Vortex ring formation in the left ventricle of the heart: analysis by 4D flow MRI and Lagrangian coherent structures”, Ann. Biomed. Eng., vol. 40, no. 12, pp. 2652–2662, 2012. doi: 10.1007/s10439-012-0615-3
A. Voskoboinick et al., “Hydroacoustics of the prosthetic bileaflet mitral valve”, in Proc. 3rd EUMLS Conf. “Mathematics for Life Sciences”, Rivne, Ukraine, 2015, p. 49. doi: 10.13140/RG.2.1.4093.2009
V.A. Voskoboinick et al., “Hydroacoustics of mechanical bileaflet heart valve”, in Proc. Intern. Symp. “Consonans-2015”, Kyiv, Ukraine, 2015, pp. 59–65 (in Russian). doi: 10.13140/RG.2.2.18199.37288
V. Voskoboinick et al., “Noise of the bileaflet mitral valve”, in Proc. Int. Conf. “Tarapov Readings”, Kharkov, Ukraine, 2016, p. 7. doi: 10.13140/RG.2.2.18199.37298
R. Vismara et al., “In vitro assessment of mitral valve function in cyclically pressurized porcine hearts”, Med. Eng. Phys., vol. 38, pp. 346–353, 2016. doi: 10.1016/j.medengphy.2016.01.007
A. Kheradvar et al., “Emerging trends in heart valve engineering: Part III. Novel technologies for mitral valve repair and replacement”, Annals Biomed. Eng., vol. 43, no. 4, pp. 858–870, 2014. doi: 10.1007/s10439-014-1129-y
G.P. Vinogradnyi et al., “Spectral and correlation characteristics of the turbulent boundary layer on an extended flexible cylinder”, J. Fluid Dyn., vol. 24, no. 5, pp. 695–700, 1989. doi: 10.1007/BF01051721
V.A. Voskoboinick and A.P. Makarenkov, “Spectral characteristics of the hydrodynamical noise in a longitudinal flow around a flexible cylinder”, Int. J. Fluid Mech., vol. 31, no. 1, pp. 87–100, 2004. doi: 10.1615/InterJFluidMechRes.v31.i1.70
V. Voskoboinick et al., “Study of near wall coherent flow structures on dimpled surfaces using unsteady pressure measurements”, Flow Turbulence Combust., vol. 90, no. 4, pp. 709–722, 2013. doi: 10.1007/s10494-012-9433-9
V. Voskoboinick et al., “Vibroacoustic characteristics of extended sonar array, streamlined under an angle attack”, in Abstracts 5th Int. Conf. ICOVP-2001, Moscow, Russia, 2001, p. 92. doi: 10.13140/RG.2.1.2382.7041
M.K. Bull, “Wall-pressure fluctuations beneath turbulent boundary layers: Some reflections on forty years of research”, J. Sound Vibr., vol. 190, no. 3, pp. 299–315, 1996. doi: 10.1006/jsvi.1996.0066
W.K. Blake, Mechanics of Flow-Induced Sound and Vibration. New York: Academic Press, 1986.
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