Vascular and venous valve implant prostheses
First Claim
Patent Images
1. A vascular implant system for facilitating the surgical implantation of a tubular vascular graft between opposing cut ends of a blood vessel from which a segment has been resected and removed, said system comprising:
- a) an exovascular stent component configured to receive and hold said tubular vascular graft therein, said exovascular stent component comprising;
a tubular stent body having a first end, a second end, and a hollow bore extending longitudinally therethrough;
a first flange formed around the first end of said tubular body;
a second flange formed around the second end of said tubular body;
said stent component being sized relative to said tubular vascular graft such that said tubular graft is coaxially positionable in the hollow bore of said stent with the ends of said graft being in contact with said first and second flanges; and
b) first and second dilation restrictor components respectively positionable on the cut ends of said blood vessel for limiting the extent to which said blood vessel may dilate relative to the size of said tubular vascular graft, each of said dilation restrictor components comprising;
an elongate tubular body having a first end, a second end and a hollow bore extending longitudinally therethrough;
an outwardly extending flange formed about the second end of said tubular body;
the tubular body of such dilation restrictor component being sized and configured to pass, first end first, over the cut end of said blood vessel such that said cut end may be attached to the flange of said dilation restrictor component with the tubular body of said restrictor component remaining disposed around said blood vessel to prevent said blood vessel from dilating to a size larger than the hollow bore of said surrounding tubular body.
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Accused Products
Abstract
Exovascular and endovascular stent devices and associated support/restrictor assemblies for use in conjunction with prosthetic vascular grafts, including venous valve grafts made from preserved bioprosthetic venous valves. Also disclosed are methods for preparing vascular grafts such as venous valve grafts using the devices and assemblies of the present invention.
362 Citations
34 Claims
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1. A vascular implant system for facilitating the surgical implantation of a tubular vascular graft between opposing cut ends of a blood vessel from which a segment has been resected and removed, said system comprising:
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a) an exovascular stent component configured to receive and hold said tubular vascular graft therein, said exovascular stent component comprising; a tubular stent body having a first end, a second end, and a hollow bore extending longitudinally therethrough; a first flange formed around the first end of said tubular body; a second flange formed around the second end of said tubular body; said stent component being sized relative to said tubular vascular graft such that said tubular graft is coaxially positionable in the hollow bore of said stent with the ends of said graft being in contact with said first and second flanges; and b) first and second dilation restrictor components respectively positionable on the cut ends of said blood vessel for limiting the extent to which said blood vessel may dilate relative to the size of said tubular vascular graft, each of said dilation restrictor components comprising; an elongate tubular body having a first end, a second end and a hollow bore extending longitudinally therethrough; an outwardly extending flange formed about the second end of said tubular body; the tubular body of such dilation restrictor component being sized and configured to pass, first end first, over the cut end of said blood vessel such that said cut end may be attached to the flange of said dilation restrictor component with the tubular body of said restrictor component remaining disposed around said blood vessel to prevent said blood vessel from dilating to a size larger than the hollow bore of said surrounding tubular body. - View Dependent Claims (2, 3, 4)
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5. An endovascular venous valve prosthesis, comprising:
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an endovascular stent assembly including a stent having a generally cylindrical body with a hollow bore extending longitudinally therethrough and inflow and outflow ends, and first and second support struts formed on opposite sides of the outflow end of said cylindrical body and extending generally longitudinally therefrom; and a preserved segment of vein having an outer wall and a venous valve positioned therein, said valve having two leaflets extending generally longitudinally within said segment of vein with lateral edges adjacent the outer wall; wherein said segment of vein is coaxially disposed within the hollow bore of said stent and attached thereto such that the leaflets of the venous valve extend transversely between the opposed support struts of said stent with said lateral edges positioned adjacent said struts, the stent and segment of vein adapted to be implanted as a unit in a patient. - View Dependent Claims (6, 7)
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8. A vascular implant system for facilitating the surgical implantation of a tubular vascular graft between opposing cut ends of a blood vessel from which a segment has been resected and removed, said system comprising:
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a) a stent component having a tubular stent body having a first end, a second end, and a conduit extending longitudinally therethrough, and being configured to receive and hold said tubular vascular graft coaxially therein, said stent component further comprising; a first flange formed proximal to the first end of said tubular body; and a second flange formed proximal to the second end of said tubular body; b) first and second interconnection members for attaching the stent component to the cut ends of the blood vessel, each interconnection member configured to receive a respective cut end of said blood vessel and having a flange which attaches to the respective cut end, the flange of the first interconnection member configured to be coupled to the first flange of the tubular body, the flange of the second interconnection member configured to be coupled to the second flange of the tubular body. - View Dependent Claims (9, 10)
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11. A method of generating a venous valve prosthesis that is adapted to restore venous valvular function within a valve-deficient vein of a patient, the method comprising the steps of:
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extracting a vein segment from a biological source other than the patient, the vein segment comprising a valve reservoir having an intact venous valve formed therein, the venous valve having at least one leaflet; processing the vein segment to preserve the venous valve in a condition in which the venous valve is competent under venous conditions; and assembling the prosthesis, the step of assembling comprising positioning a support structure over an exterior surface of at least a portion of the valve reservoir. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of generating a venous valve prosthesis, the method comprising the steps of:
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extracting a vein segment from an animal, the vein segment comprising a valve reservoir having an intact venous valve formed therein, the venous valve having at least one leaflet; processing the vein segment to preserve the venous valve in an operable condition; positioning a support structure over an exterior surface of at least a portion of the valve reservoir, the support structure having a conduit extending therethrough, and including first and second outwardly-extending flanges at opposite respective ends of the conduit; and attaching the vein segment to the support structure with the valve reservoir positioned within the conduit, the step of attaching comprising splaying the first and second ends of the vein segment and suturing the first and second ends, respectively, to the first and second flanges. - View Dependent Claims (21, 22, 23)
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24. A venous valve prosthesis that is adapted to restore venous valvular function within a valve-deficient vein, the prosthesis comprising:
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a harvested vein segment, the vein segment comprising a valve reservoir having a least one intact venous valve formed therein, the venous valve having at least one leaflet, the vein segment being conditioned to preserve the competency of the venous valve; and a support member positioned over an exterior surface of at least the valve reservoir, the support member providing support for the valve reservoir following implantation of the prosthesis. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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31. A venous valve prosthesis for implantation within a human, the prosthesis comprising:
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a harvested vein segment, the vein segment comprising a valve reservoir having a least one intact venous valve formed therein, the venous valve having at least one leaflet, the vein segment being conditioned to preserve the venous valve in an operable condition; and a support member comprising a tubular member having a conduit, and having first and second outwardly-extending flanges at first and second ends of the tubular member, respectively; wherein the harvested vein segment is disposed coaxially within the conduit with the support member is positioned over an exterior surface of at least the valve reservoir, and wherein first and second ends of the harvested vein segment are attached to the first and second flanges, respectively. - View Dependent Claims (32, 33, 34)
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Specification