Cannula cut stent with closed end cell geometry
View Patent ↗Disclosed herein is an intraluminal support device including a closed cell design on at least one end of the device. In such a device, the closed cell structure is formed by connecting all peaks of an ultimate ring to all peaks of a penultimate ring, and all valleys of the ultimate ring to all valleys of the ultimate ring. The support device expands evenly due to this structure.
1. An intraluminal support device for implantation into a lumen of a body vessel, the intraluminal support device comprising:
a tubular body having a first end extending to a second end and defining a longitudinal axis, the tubular body comprising a plurality of inner rings each comprising a plurality of struts and bends arranged in a repeating pattern to define a plurality of peaks and a plurality of valleys, the plurality of inner rings being disposed axially along the longitudinal axis, the tubular body being radially expandable from a compressed state to an expanded state; and
an end cell disposed at at least one of the first end and the second end, the end cell comprising a penultimate ring and an ultimate ring, each of the penultimate ring and the ultimate ring comprising a plurality of struts and bends arranged in a repeating pattern to define a plurality of peaks and a plurality of valleys, each peak of the ultimate ring having a width less than that of a peak of an inner ring and being connected at an inner edge thereof to a peak of the penultimate ring at an outer edge thereof by a connector segment, and
each valley of the ultimate ring being connected at an outer edge thereof to a valley of the penultimate ring at an inner edge thereof by a connector segment.
2. The intraluminal support device of claim 1 , wherein each of the plurality of inner rings are connected to one another by at least one connector segment.
3. The intraluminal support device of claim 1 , wherein each of the connector segments are substantially parallel to the longitudinal axis in the compressed state.
4. The intraluminal support device of claim 1 , wherein the intraluminal support device is self-expanding.
5. The intraluminal support device of claim 4 , wherein the intraluminal support device comprises a shape-memory material.
6. The intraluminal support device of claim 5 , wherein the shape memory material comprises a nickel-titanium alloy.
7. The intraluminal support device of claim 5 , wherein the tubular body and the end cell are of unitary construction.
8. The intraluminal support device of claim 7 , wherein the tubular body and the end cell are cut from a cylindrical body.
9. The intraluminal support device of claim 1 , comprising an end cell at the first end and at the second end.
10. The intraluminal support device of claim 1 , wherein each of the plurality of struts of the ultimate ring comprise a taper proximate the peaks.
11. The intraluminal support device of claim 10 , wherein the end cell has a radial stiffness substantially equal to that of an inner ring.
12. The intraluminal support device of claim 1 , wherein the intraluminal support device is balloon-expandable.
13. An intraluminal support device for implantation into a lumen of a body vessel, the intraluminal support device comprising:
a tubular body having a first end extending to a second end and defining a longitudinal axis, the tubular body comprising a plurality of inner rings each comprising a plurality of struts and bends arranged in a repeating pattern to define a plurality of peaks and a plurality of valleys, each peak of the plurality of inner rings having a first width, the plurality of inner rings being disposed axially along the longitudinal axis, the tubular body being radially expandable from a compressed state to an expanded state; and
an end cell disposed at at least one of the first end and the second end, the end cell comprising a penultimate ring and an ultimate ring, each of the penultimate ring and the ultimate ring comprising a plurality of struts and bend arranged in a repeating pattern to define a plurality of peaks and a plurality of valleys,
each peak of the ultimate ring being connected at an inner edge thereof to a peak of the penultimate ring at an outer edge thereof by a connector segment, each peak of the ultimate ring having a second width less than the first width, each valley of the ultimate ring being connected at an outer edge thereof to a valley of the penultimate ring at an inner edge thereof by a connector segment, each connector segment being substantially parallel to the longitudinal axis in the compressed state,
wherein the intraluminal support device is self-expanding.
14. The intraluminal support device of claim 13 , comprising an end cell at the first end and at the second end.
15. The intraluminal support device of claim 13 , wherein the end cell has a radial stiffness substantially equal to that of an inner ring.
16. The intraluminal support device of claim 13 , wherein each of the plurality of struts of the ultimate ring comprise a taper proximate the peaks.
17. The intraluminal support device of claim 13 , wherein the intraluminal support device comprises a shape-memory material.
18. The intraluminal support device of claim 13 , wherein the tubular body and the end cell are of unitary construction.
19. The intraluminal support device of claim 18 , wherein the tubular body and the end cell are cut from a cylindrical body.
20. An intraluminal support device for implantation into a lumen of a body vessel, the intraluminal support device comprising:
a tubular body having a first end extending to a second end and defining a longitudinal axis, the tubular body comprising a plurality of inner rings each comprising a plurality of struts and bends arranged in a repeating pattern to define a plurality of peaks and a plurality of valleys, the plurality of inner rings being disposed axially along the longitudinal axis, the tubular body being radially expandable from a compressed state to an expanded state; and
an end cell disposed at at least one of the first end and the second end, the end cell comprising a penultimate ring and an ultimate ring, each of the penultimate ring and the ultimate ring comprising a plurality of struts and bends arranged in a repeating pattern to define a plurality of peaks and a plurality of valleys, each of the plurality of struts of the ultimate ring comprising a taper proximate the peaks, each peak of the ultimate ring having a width less than that of a peak of an inner ring and being connected at an inner edge thereof to a peak of the penultimate ring at an outer edge thereof by a connector segment, and
each valley of the ultimate ring being connected at an outer edge thereof to a valley of the penultimate ring at an inner edge thereof by a connector segment.