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Contribution à l'optimisation et à la modélisation d'un banc de mesure CEM : Application à la caractérisation de l'immunité des stimulateurs cardiaques

Abstract : The purpose of this thesis relates to the optimization of a test bed which allows the in vitro characterization of cardiac pacemaker immunity to low frequency disturbances as well as the computational modeling. In a first part, after having presented the theoretical bases of the bioelectromagnetism, we present the electrical system of the heart, and a functional description of pacemakers. The optimization of the test bed relates to the source of magnetic field and tissue-equivalent phantom which permit the in vitro experiments. The source of magnetic field realized consists of four coils contained in a spherical envelope which makes it possible to produce a homogeneous magnetic field with order 4. The tissue-equivalent phantom is carried out on the basis of saline solution. In the fourth chapter, after a review of the various methods of numerical simulation used in electromagnetic dosimetry, we present an original numerical method based on the impedance method which makes it possible to determine the potentials induced in a medium subjected to a galvanic coupling. The final chapter is devoted to measurements and the simulation of induced tension, in vitro, to the terminals of the cardiac pacemaker subjected to conducted and radiated disturbances. The method suggested makes it possible to determine the level of immunity of pacemaker subjected to electromagnetic disturbances according to the geometrical configuration, electric characteristics of cardiac pacemakers as well as coupling medium.
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Jean-Paul Andretzko. Contribution à l'optimisation et à la modélisation d'un banc de mesure CEM : Application à la caractérisation de l'immunité des stimulateurs cardiaques. Autre. Université Henri Poincaré - Nancy 1, 2007. Français. ⟨NNT : 2007NAN10054⟩. ⟨tel-01748286⟩

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