Abstract
In the study reported here the in vitro fluid dynamic characteristics of the St. Jude (mechanical bi-leaflet), Carpentier-Edwards (porcine) and Ionescu-Shiley (calf pericardial) aortic valve prostheses were investigated. The experiments conducted were (a) pressure drop measurements, (b) preliminary photography of the opening of the tissue valve leaflets, and (c)velocity and shear stress measurements. The pressure drop, velocity and shear stress measurements were conducted under steady flow conditions, while the preliminary photography studies were conducted under steady and pulsatile flow conditions. The pressure drop results indicated that the St. Jude and Hall-Kaster valves have the lowest pressure drops compared to any of the other valves used clinically at present. The two bioprostheses had larger pressure drops than would be expected for their basic designs. The smaller sizes of the Carpentier-Edwards valve had excessively large pressure-drops. The photographs of the opening of the valve leaflets indicated that the two bioprostheses do not open as ideally as the natural aortic valve. It was also observed that the Ionescu-Shiley aortic valves opened more symmetrically and with reproducability than the corresponding Carpentier-Edwards valves.
Detailed velocity and shear stress measurements were made with a laser-Doppler anemometer system. These measurements indicated that the flow that emerged from the leaflets of both types of tissue valves was jet-like and could lead to turbulent shear stresses on the order of 1000–3000 dynes /cm2. Such turbulent shear stresses could be harmful to blood components. The jet type flow could also damage the the wall of the ascending aorta. Velocity measurements in the immediate downstream vicinity of the St. Jude valve showed that the flow field which emerged from the valve was centralized. The velocity measurements also indicated that there was a region of flow separation adjacent to the vessel wall and immediately downstream from the sewing ring. Such a region of flow separation could lead to excessive tissue overgrowth along the aortic side of the sewing ring. All three types of valve designs, however, created relatively low wall shear stresses on the order of 100–600 dynes/cm2. This result is definitely a positive aspect of these valves when you consider that most of the rigid aortic prostheses we have studied created wall shears on the order of 1000–3000 dynes/cm2.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
Anderson, G. H., Hellums, J. D., Moake, J., and Alfrey, C.P. (1978) Platelet response to shear stress: changes in serotonin release, and ADP induced aggregation, Thrombosis Res. 13, 1039–1047.
Broom, N. D. (1978) Fatigue induced damage in glutaraldehydepreserved heart valve tissue, J. Thorac. Cardiovasc. Surg. 76, 202–211.
Dellsperger, K. C., and Wieting, D. W. (1979) Presented at the 14th Annual AAMI Meeting, Las Vegas.
Ferrans, V. J., Spray, T. L., Billingham, M. E., and Roberts, W. C. (1978) Structural changes in gluteraldehyde-treated porcine hetrografts used as substitute cardiac vlaves, Am. J. Cardiol. 41, 1159–1184.
Gabbay, S., McQueen, D. M., Yellin, E. L., and Frater, R. W. M. (1979) In vitro hydrodynamic comparison of mitral valve bioprostheses. To be published in Supplement to Circulation, Cardiovascular Surgery.
Hellums,J. D., and Brown III, C. H. (1977) Blood cell damage by mechanical forces. Cardiovascular Flow Dynamics (Edited by N. H. C. Hwang and N. A. Norman) University Park Press, Baltimore, Maryland.
Ionescu, M. I., Tanden, A. P., Mary, D. A. S., Abid, A. (1977) Heart valve replacement with the Ionescu-Shiley pericardial xenografts.J. Thorac. Cardiovasc. Surg. 73, 31–42.
Ramstack, J. M., Zuckerman, L., and Mockros, L. F. (1979)
Shear induced activation of platelets, J. Biomech. 12, 113–125.
Spray, T. L., and Roberts, W. C. (1977) Structural changes in porcine xenografts used as substitute cardiac valves, Am. J. Cardiol. 40, 319–330.
Stinson, E. B., Griepp, R. B., Oyer, P. E., and Shumway, N.E. (1977) Long-term experience with porcine aortic valve xeno-grafts, J. Thorac. Cardiovasc. Surg. 73,54–63.
Yoganathan, A. P., (1978) Cardiovascular fluid mechanics, Ph.D. Thesis, California Institute of Technology.
Yoganathan, A. P., Corcoran, W. H., and Harrison, E. C. (1978) Wall shear stress measurements in the near vicinity of prosthetic aortic heart valves, J. Bioeng. 2, 369–379.
Yoganathan, A. P., Corcoran, W. H., and Harrison, E.C. (1979a) In vitro velocity measurements in the vicinity of aortic prostheses. J. Biomech. 12, 135–152.
Yoganathan, A. P., Reamer, H. H., Corcoran, W.H., and Harrison, E. C. (1979b) A laser-Doppler anemometer to study velocity fields in the vicinity of prosthetic heart valves, Med. Biol. Eng. Comput. 17, 38–44.
Yoganathan, A. P., Corcoran, W. H., and Harrison, E. C. (1979c) Pressure drops across prosthetic aortic heart valves under steady and pulsatile flow–in vitro measurements, J. Biomech 12, 153–164.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1980 Springer Science+Business Media New York
About this chapter
Cite this chapter
Yoganathan, A.P., Corcoran, W.H., Harrison, E.C., Chaux, A. (1980). In Vitro Fluid Dynamics of St. Jude, Ionescu-Shiley and Carpentier-Edwards Aortic Heart Valve Prostheses. In: Schneck, D.J. (eds) Biofluid Mechanics · 2. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-4610-5_15
Download citation
DOI: https://doi.org/10.1007/978-1-4757-4610-5_15
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4757-4612-9
Online ISBN: 978-1-4757-4610-5
eBook Packages: Springer Book Archive