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Modélisation de l'Atténuation du Signal EMG Diaphragmatique de Surface

Cheick Konte 1
1 TIMC-PRETA - Physiologie cardio-Respiratoire Expérimentale Théorique et Appliquée
TIMC - Techniques de l'Ingénierie Médicale et de la Complexité - Informatique, Mathématiques et Applications, Grenoble - UMR 5525
Abstract : The detection of diaphragmatic EMG signal by surface is a hard measure. The attenuation induced by the different tissues lying on the way diaphragm electrode and low amplitude potentials are generated to cause a signal to noise ratio which makes the analysis of the signal difficult. In this thesis, we propose to evaluate the levels of attenuation at two steps: A first level called "large volume" of considering the thorax as homogeneous and consists of lung tissue and to assess the diaphragmatic attenuation as a function of distance fiber electrode and the conductivity of the lung tissue. The desire to compare modeling results with experimental measurements, led us to consider the specific case of measuring esophageal coupled with phrenic nerve stimulation. We used an experimental design to analyze the different parameters of influence. This first approach was based on an analytical model. A second level is to take into account the effect of inhomogeneities on the path fiber electrode. This stage, conducted prospectively, is here focused on the analysis of the influence of ratings on the signal attenuation. At this scale, the confrontation with the measurement becomes more difficult and we propose a study based solely on modeling. The latter is conducted by using finite elements.
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Submitted on : Tuesday, April 27, 2010 - 5:17:03 PM
Last modification on : Monday, December 7, 2020 - 12:24:04 PM
Long-term archiving on: : Tuesday, September 28, 2010 - 1:18:05 PM

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  • HAL Id : tel-00477003, version 1

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Cheick Konte. Modélisation de l'Atténuation du Signal EMG Diaphragmatique de Surface. Ingénierie biomédicale. Université Joseph-Fourier - Grenoble I, 2010. Français. ⟨tel-00477003⟩

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