Asymmetric multiple electrode support structures

A - Human Necessities – 61 – N

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A61N 1/05 (2006.01) A61N 1/20 (2006.01) A61N 1/40 (2006.01)

Patent

CA 2270172

Multiple electrode support structures (20(4)) have asymmetric geometries, either axially, or radially, or both. The asymmetric support structures are assembled from spline elements (51-58) that extend between a distal hub (24) and a proximal base (26). In one embodiment, the spline elements (51-58) are circumferentially spaced about the distal hub (24) in a radially asymmetric fashion, creating a greater density of spline elements in one region of the structure than in another region. In the same or another embodiment, the spline elements (51-58) are preformed in an axially asymmetric fashion along their lengths, creating a different geometry in their distal regions than in their proximal regions.

Ces structures de support d'électrodes multiples (20(a)) sont géométriquement asymétriques, que ce soit axialement ou radialement ou les deux. Ces structures asymétriques de support sont constituées de languettes (51, 58) disposées entre une pièce centrale distale (24) et une base proximale (26). Dans un mode de réalisation, les languettes (51, 58) se répartissent selon une circonférence autour de la pièce centrale (24), de façon asymétrique sur un plan radial, ce qui se solde par une densité de languettes plus importante dans une partie de la structure que dans l'autre. Dans le même mode de réalisation, ou bien dans un autre, ces languettes (51, 58) sont préformées de manière à être disposées de façon asymétrique sur un plan axial, ce qui débouche sur une géométrie des parties distales différente de la géométrie des parties proximales.

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