Memory material valve
First Claim
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1. A valve for modulating bloodflow in a blood passage, comprising:
- a body defining a proximal end and a distal end wherein the proximal end defines a memory shape element configured for applying longitudinal and hoop pressure to the proximal end at a site for modulating bloodflow, wherein the distal end defines a memory shape element configured to extend along the length of the passage to fit the variation in diameter and curvature along the length of the passage extending away from the site.
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Abstract
A replacement heart valve comprising a memory shape element. The various embodiments use internal body heat to seat and retain the valve within a blood passage. The element can be provided in a variety of shapes and sizes, and is at least partially encased within an inert and pliant encasing material. The encasing material is one that is adapted to be contiguous with the structure of the valve nozzle or backflow-resistant leaf structure, and may be used in combination with existing stents or an incorporated stent, including ones having a structure similar to conventional stents.
9 Citations
12 Claims
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1. A valve for modulating bloodflow in a blood passage, comprising:
a body defining a proximal end and a distal end wherein the proximal end defines a memory shape element configured for applying longitudinal and hoop pressure to the proximal end at a site for modulating bloodflow, wherein the distal end defines a memory shape element configured to extend along the length of the passage to fit the variation in diameter and curvature along the length of the passage extending away from the site. - View Dependent Claims (2, 3, 4, 5)
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6. A valve for modulating bloodflow in a blood passage comprising:
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a 1st memory shape element at least partially encased in a first encasing material, a valve structure integrally formed within the first encasing material, a second memory shape element at least partially encased in a second encasing material, a supplemental element disposed between the first and second memory shape elements, wherein the first memory shape element is configured to be spaced apart from the second memory shape element by the supplemental element, wherein the first memory shape element is configured to apply longitudinal and hoop pressure to a passage at a site where fluid flow is modulated; wherein the second memory shape element is configured to apply longitudinal and hoop pressure along the length of the passage away from the fluid flow modulation site. - View Dependent Claims (7, 8, 9, 10)
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11. A valve for modulating bloodflow in a blood passage, comprising:
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a first memory shape element at least partially encased in an encasing material, a valve structure that is integrally formed with the first encasing material, a supplemental element, a second memory shape element at least partially encased in a second encasing material that is noncontiguous with the first encasing material, wherein the first memory shape element comprises a ring of memory shape material, wherein the supplemental element is a stent and comprises a memory shape material, wherein the second memory shape element comprises a helical ribbon of memory shape material, wherein the material of the second encasing material is interspersed between the coils of the helical ribbon.
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12. A valve for modulating bloodflow in a blood passage, comprising:
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a first memory shape element a least partially encased in an encasing material, a valve structure that is integrally formed with the first encasing material, wherein a portion of the first memory shape element extends out of the encasing material, away from the valve, along the length of a passage, a second memory shape element, at least partially encased in the encasing material that extends out of the encasing material, away from the valve, along the length of the passage, wherein the first memory shape element is a helical coil, wherein the second memory shape element is a counter wound helical coil, configured to resist spiraling and drifting.
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Specification