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Proceedings Paper

Laser Doppler technique for nondestructive evaluation of mechanical heart valves kinematics
Author(s): Mauro Grigioni; Carla Daniele; U. Morbiducci; C. Del Gaudio; Giuseppe D'Avenio; D. Di Meo; Vincenzo Barbaro
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Paper Abstract

Laser techniques for vibration measurement, due to their non-contact nature, represents an interesting alternative investigational tool to be tested in biomedical and clinic fields. A particular application could be as evaluation method in design and quality control of artificial organs. Aim of this study is to investigate the application of laser vibrometry to the study of mechanical heart valves in-vitro, with an ad hoc set-up. A heterodyne laser Doppler vibrometry system, which allows the measurement of both vibrational velocity and displacement was used. Three different approaches have been carried out, in order to stress the limits of the laser vibrometry technique for testing heart valve prostheses. Critical points and difficulties to build up experimental studies in this field were clearly pointed out. In the present study only one laser head was used, the aim of the authors being to test the feasibility of a simplified approach on mechanical cardiac valves. Starting from that analysis a comparison could be made to assess the capability to discriminate between normal and malfunctioning devices. The advantage of the proposed test bench is that it could provide a non-contact, non-destructive analysis of the valve under the same working conditions as those upon implantation. The proposed method could furnish a typical "fingerprint" characterizing each valve behavior in repeatable experimental conditions.

Paper Details

Date Published: 22 June 2004
PDF: 7 pages
Proc. SPIE 5503, Sixth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (22 June 2004); doi: 10.1117/12.579538
Show Author Affiliations
Mauro Grigioni, Istituto Superiore di Sanita (Italy)
Carla Daniele, Istituto Superiore di Sanita (Italy)
U. Morbiducci, Istituto Superiore di Sanita (Italy)
C. Del Gaudio, Istituto Superiore di Sanita (Italy)
Giuseppe D'Avenio, Istituto Superiore di Sanita (Italy)
D. Di Meo, Istituto Superiore di Sanita (Italy)
Vincenzo Barbaro, Istituto Superiore di Sanita (Italy)

Published in SPIE Proceedings Vol. 5503:
Sixth International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

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