Stent devices and support/restrictor assemblies for use in conjunction with prosthetic vascular grafts
First Claim
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1. A dilation restrictor apparatus for limiting the extent to which a blood vessel may dilate adjacent to a point whereat a cut end of said blood vessel has been anastomosed to an implant graft, said dilation restrictor apparatus comprising:
- an elongate tubular body having a first end, a second end and a hollow bore extending longitudinally therethrough, said tubular body including a plurality of apertures formed therein to permit passage of fluid therethrough;
an outwardly extending flange formed about the second end of said tubular body;
said tubular body 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 apparatus with the tubular body of said restrictor apparatus 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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Abstract
Dilation restrictor apparatus for use in conjunction with prosthetic vascular grafts, including venous valve grafts made from preserved bioprosthetic venous valves. The dilation restrictors limit the extent to which a blood vessel may dilate adjacent to a point whereat a cut end of the blood vessel has been anastomosed to an implant graft. Also disclosed is a related method of anastomosing the prosthetic graft to an existing vein segment of a patient.
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Citations
16 Claims
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1. A dilation restrictor apparatus for limiting the extent to which a blood vessel may dilate adjacent to a point whereat a cut end of said blood vessel has been anastomosed to an implant graft, said dilation restrictor apparatus comprising:
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an elongate tubular body having a first end, a second end and a hollow bore extending longitudinally therethrough, said tubular body including a plurality of apertures formed therein to permit passage of fluid therethrough; an outwardly extending flange formed about the second end of said tubular body; said tubular body 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 apparatus with the tubular body of said restrictor apparatus 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, 5)
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6. A method of anastomosing a cut end of an existing vein of a patient to a valvular prosthesis, the valvular prosthesis comprising a tubular stent member having a preserved vein segment positioned coaxially therein, the preserved vein segment comprising at least one venous valve, the tubular stent member having an outwardly extending flange at an end thereof, the flange affixed to an end of the preserved vein segment, the method comprising the steps of:
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positioning a tubular interconnection member coaxially over the existing vein such that an outwardly-extending flange at one end of the tubular interconnection member is positioned proximate to the cut end of the tubular interconnection member, the tubular interconnection member configured to restrict dilation of the existing vein at a junction between the vein and the valvular prosthesis; outwardly splaying the cut end of the existing vein such that an outer surface of the existing vein is in contact with the flange of the tubular interconnection member; and coupling the flange of the tubular interconnection member to the flange of the tubular stent member such that tissue of the existing vein and of the preserved vein segment is disposed between said flanges following the step of coupling. - View Dependent Claims (7, 8, 9)
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10. A method of anastomosing a first cut end of a first blood vessel with a second cut end of a second blood vessel, the method comprising the steps of:
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positioning a first tubular member coaxially over the first blood vessel such that an outwardly-extending flange at one end of the first tubular member is positioned proximate to the first cut end; outwardly splaying the first cut end of the first blood vessel such that an outer surface of the first cut end is in contact with the first flange; positioning a second tubular member coaxially over the second blood vessel such that an outwardly-extending flange at one end of the second tubular member is positioned proximate to the second cut end; outwardly splaying the second cut end of the second blood vessel such that an outer surface of the second cut end is in contact with the second flange; and coupling the first flange to the second flange while maintaining the outer surface of the first cut end in contact with the first flange and maintaining the outer surface of the second cut end in contact with the second flange, such that tissue of the first and second cut ends is disposed between the first and second flanges following anastomosis. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification