Extending ribbon stent
First Claim
1. An expandable stent with improved structural stability for insertion into a corporeal lumen, the stent having a longitudinal axis and comprising a helically coiled ribbon, the stent expandable from a compressed configuration to an expanded configuration, the coiled ribbon comprising a single strip of metal helically wound around the longitudinal axis of the stent, the strip of metal having a plurality of interconnected parallel zigzag chains, each chain running the length of the single strip of metal and joined to adjacent zigzag chains, each zigzag chain comprising a sense of struts, the struts at their ends adjoined to adjacent struts by connections, the connections on one side of the zigzag chains being the common connections for the adjacent side of an adjacent zigzag chain, the struts of each zigzag chain being approximately parallel to adjacent struts when the stent is in a compressed configuration, and the struts being at angles to adjacent struts when the stent is in an expanded configuration.
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Abstract
The present invention concerns an improved stent for placement in corporeal lumens. More particularly, the present invention concerns an improved stent for placement in a corporeal lumen comprising a coiled ribbon which is rigid enough to maintain the relative position of each turn of the coiled ribbon during its expansion within the lumen after placement.
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Citations
26 Claims
- 1. An expandable stent with improved structural stability for insertion into a corporeal lumen, the stent having a longitudinal axis and comprising a helically coiled ribbon, the stent expandable from a compressed configuration to an expanded configuration, the coiled ribbon comprising a single strip of metal helically wound around the longitudinal axis of the stent, the strip of metal having a plurality of interconnected parallel zigzag chains, each chain running the length of the single strip of metal and joined to adjacent zigzag chains, each zigzag chain comprising a sense of struts, the struts at their ends adjoined to adjacent struts by connections, the connections on one side of the zigzag chains being the common connections for the adjacent side of an adjacent zigzag chain, the struts of each zigzag chain being approximately parallel to adjacent struts when the stent is in a compressed configuration, and the struts being at angles to adjacent struts when the stent is in an expanded configuration.
- 15. An expandable stent with improved structural stability for insertion into a corporeal lumen, the stent having a longitudinal axis and comprising a helically coiled ribbon, the stent expandable from a compressed configuration to an expandable configuration, the coiled ribbon comprising a single strip of metal helically wound around the longitudinal axis of the stent, the single strip of metal comprising a plurality of interconnected parallel zigzag chains, each chain running the length of the single strip of metal, and joined to adjacent zigzag chains, each chain comprising a series of struts, the struts at their ends joined to adjoining struts by connections, the connections on adjacent sides of adjacent zigzag chains being joined by longitudinal spacers to join the adjacent zigzag chains, the longitudinal spacer perpendicular to the zigzag chains, the struts of each zigzag chain being approximately parallel to adjacent struts when the stent is in a compressed configuration, and the struts positioned at an angle to adjacent struts when the stent is in an expanded configuration.
Specification