ISSN:
1573-8922
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Conclusions 1. Comparison of the relative strength and deformation properties of various elements of the human valve-aorta unit indicated the invariance of these values despite individual differences. The relative deformativity is the most stable of these indices, indicating a coordinated scheme for the deformative behavior of the valve—aorta unit. 2. The strength and deformativity boundaries as well as the elasticity indices indicate significant anisotropy of the elastic and strength properties of the human valve—aorta unit. The difference in the elastic deformation properties of the elements comprising a single structure defined anatomically as the root of the aorta indicates their different role in accomplishing hemodynamically normal and reliable operation of the aortic valve. 3. The existence of an elastic housing was established which consists of highly rigid elements, namely, the fibrous ring, commissures, and arched ring. The elastic housing supports the membranous elements, namely, the semilunar valves, Valsalva sinuses, and ascending aorta. The sinuses are the most pliable of these elements. 4. True deformation diagrams were obtained for the different elements of the human valve—aorta unit. These diagrams give the dependence of the elastic properties of the various elements on the deformation level. The working deformation segments for various samples were found using repeated static loading. These segments correspond to the maximum working deformations of the elements upon loading of the unit without loss of strength and approximately coincide with the curvilinear segments on the deformation curves.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00605098
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