Nested stent
First Claim
Patent Images
1. An intraluminal device for implantation into a body lumen comprising:
- an elongate tubular stent formed of a helically wound wire defining a plurality of wire waves wherein said wire waves are longitudinally nested within each other;
the stent having an unexpanded state, the plurality of wire waves comprising a first wire wave and a second wire wave, the first wire wave being longitudinally adjacent to the second wire wave, wherein at least a portion of the first wire wave is in direct contact with at least a portion of the second wire wave in the unexpanded state;
the stent having a length; and
a lumen defined by a covering extending along at least a portion of the length of the stent, wherein the stent defines an open area between portions of the longitudinally adjacent wire waves, the percentage of open area in relation to the total surface area of the stent is less than 28%, when the stent is in the unexpanded state.
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Abstract
An intraluminally implantable stent is formed of helically wound wire. The stent has a generally elongate tubular configuration and is radially expandable after implantation in a body vessel. The wire includes successively formed waves along the length of the wire. When helically wound into a tube, the waves are longitudinally nested along the longitudinal extent of the stent so as to form a densely compacted wire configuration. After radial expansion the stent maintains high radial compressive strength and wire density to retard tissue ingrowth.
69 Citations
12 Claims
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1. An intraluminal device for implantation into a body lumen comprising:
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an elongate tubular stent formed of a helically wound wire defining a plurality of wire waves wherein said wire waves are longitudinally nested within each other; the stent having an unexpanded state, the plurality of wire waves comprising a first wire wave and a second wire wave, the first wire wave being longitudinally adjacent to the second wire wave, wherein at least a portion of the first wire wave is in direct contact with at least a portion of the second wire wave in the unexpanded state; the stent having a length; and a lumen defined by a covering extending along at least a portion of the length of the stent, wherein the stent defines an open area between portions of the longitudinally adjacent wire waves, the percentage of open area in relation to the total surface area of the stent is less than 28%, when the stent is in the unexpanded state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An intraluminal device for implantation into a body lumen comprising:
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an elongate tubular stent defined by a plurality of helically wound wire waves, each wire wave defined by an amplitude; longitudinally adjacent wire waves having a peak-to-peak distance, wherein the peak-to-peak distance is less than two times of the amplitude of at least one of the longitudinally adjacent wire waves; the stent having an unexpanded state, the plurality of wire waves comprising a first wire wave and a second wire wave, the first wire wave being longitudinally adjacent to the second wire wave, wherein at least a portion of the first wire wave is in direct contact with at least a portion of the second wire wave in the unexpanded state; the stent having a length; and a covering extending along at least a portion of the length of the stent, wherein the stent defines an open area between portions of the longitudinally adjacent wire waves, the percentage of open area in relation to the total surface area of the stent is less than 28%, when the stent is in the unexpanded state.
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Specification