Composite stent with inner and outer stent elements and...

Details Composite stent with inner and outer stent elements and... Composite stent with inner and outer stent elements and...

A - Human Necessities

61

F

A61F 2/06 (2006.01)

Patent

CA 2547006

A composite stent structure includes separate and distinct stent elements or members: an outer stent element and an inner stent element removably attached to the outer stent element. The outer element may be, for example, a bioabsorbable stent typically constructed of a relatively non-resilient material such that the outer bioabsorbable stent element may not be self- expanding and subject to migration within the lumen over time. In contrast, the inner element may be, for example, a removable SEMS used to urge and maintain the outer element in position in the body lumen. The temporary inner SEMS may retain the composite structure (including the underlying inner element) in position until such time as the outer element is appropriately incorporated into the surrounding tissue or some other criteria occurs such that the removal of the SEMS is indicated. The SEMS may then be detached from the outer element and removed from the body lumen.

L'invention concerne une structure de tuteur composite munie d'éléments de tuteur séparés et distincts: un élément de tuteur externe et un élément de tuteur interne fixé de manière détachable à l'élément de tuteur externe. L'élément externe peut être, par exemple, un tuteur bioabsorbable constitué généralement d'un matériau relativement non résilient qui empêche l'élément de tuteur bioabsorbable de s'auto-déployer et de migrer dans la lumière corporelle au fil du temps. En revanche, l'élément interne peut être, par exemple, un SEMS amovible utilisé pour solliciter et maintenir l'élément externe en position dans la lumière corporelle. Le SEMS interne temporaire peut maintenir en position la structure composite (y compris l'élément interne sous-jacent) jusqu'à ce que l'élément externe soit correctement incorporé dans le tissu environnant ou que d'autres critères interviennent qui font que le retrait du SEMS soit indiqué. Le SEMS peut alors être détaché de l'élément externe et retiré de la lumière corporelle.

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