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Proceedings Paper

Vibration measurement on artificial heart valve by laser Doppler vibrometry
Author(s): Paolo Castellini; R. Huebner; Marcos Pinotti
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Paper Abstract

The use of artificial heart valves is more and more diffused in the medical practice in particular in Europe and US where the average age of the people is continuously increasing. In the engineering point of view they present several problems that can be faced by a deep knowledge of the behaviour in operative conditions. Such problems are mainly related to the compatibility with the patient body and the reliability of the valve itself, and both are related to the possibility of a continuative and extended application in real cases. The compatibility is mainly related to the material choice and to the fluid-dynamic behaviour. The reliability can be basically improved by a smart and simplified design of each component, which imposes a really intensive evaluation of the response to operative inputs. Fatigue is one of the most important effects related to reliability. A mechanical valve is subjected to fluid-dynamics forces and repeatable shocks. due the impact on the constraints, which create dangerous vibrations. The analysis of such vibrations by SLDV[1][2] in both free and operative conditions is the main task of the present work. In this paper an experimental and numerical analysis of the vibrational behaviour of a mono-leaflet valve was performed in order to extract useful information on the optimised design. An in vitro test, simulating operative conditions, was performed in order to verify the real behaviour of the valve.

Paper Details

Date Published: 22 May 2002
PDF: 9 pages
Proc. SPIE 4827, Fifth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (22 May 2002); doi: 10.1117/12.468147
Show Author Affiliations
Paolo Castellini, Univ. degli Studi di Ancona (Italy)
R. Huebner, Univ. Federal de Minas Gerais (Brazil)
Marcos Pinotti, Univ. Federal de Minas Gerais (Brazil)


Published in SPIE Proceedings Vol. 4827:
Fifth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

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