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US 9,427,341 B2Granted
Stent
AssigneeTerumo Kabushiki Kaisha
InventorTakeshi Baba
Life of this patent
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Abstract
A stent and method of exhibiting radiopaque properties in a stent are disclosed, which includes a stent main body that is made of a metal, and a radiopaque marker that is made of a complete solid solution alloy having a corrosion potential of ±200 mV of a corrosion potential of the metal of the stent main body.
Claims17
A stent comprising:
- a stent main body that is made of a metal, wherein the metal of the stent main body is a cobalt-based alloy;
- and
- a radiopaque marker that is made of a complete solid solution alloy having a corrosion potential of ±200 mV of a corrosion potential of the metal of the stent main body, wherein the complete solid solution alloy is 75 Mo-25 Ta, 50 Mo-50 Ta, 50 Nb-50 W, 25 Nb-75 W, or 50 Ta-50 W, wherein each number indicates % by mole, adding UP 100% by mole in total.
A stent comprising:
- a stent main body that is made of a metal, wherein the metal of the stent main body is stainless steel;
- and
- a radiopaque marker that is made of a complete solid solution alloy having a corrosion potential of ±200 mV of a corrosion potential of the metal of the stent main body, wherein the complete solid solution alloy is 75 Mo-25 Ta, 50 Mo-50 Ta, 50 Nb-50 W, 25 Nb-75 W, or 50 Ta-50 W, wherein each number indicates % by mole, adding up 100% by mole in total.
A stent comprising:
- a stent main body that is made of a metal having a corrosion potential, wherein the metal of the stent main body is a cobalt-based alloy, and wherein the stent main body is a cylindrical body in which both terminal portions are open, and which extends in a longitudinal direction between both of the terminal portions, and wherein the cylindrical body includes a plurality of annular units, each of the plurality of annular units includes a plurality of rhombus-shaped elements, which are continuously arranged and linked in a short axial direction of the plurality of rhombus-shaped elements;
- and
- at least one radiopaque marker that is made of a complete solid solution alloy having a corrosion potential, and wherein the at least one radiopaque marker is located within at least one of the plurality of annular units, and the corrosion potential of the radiopaque marker is ±200 mV of the corrosion potential of the metal of the stent main body, wherein the complete solid solution alloy is 75 Mo-25 Ta, 50 Mo-50 Ta, 50 Nb-50 W, 25 Nb-75 W, or 50 Ta-50 W, wherein each number indicates % by mole, adding UP 100% by mole in total.
A method of exhibiting radiopaque properties in a stent comprising:
- placing a radiopaque marker that is made of a complete solid solution alloy in a stent main body that is made of a metal, and wherein a corrosion potential of the radiopaque marker is ±200 mV of a corrosion potential of the metal of the stent main body, wherein the metal of the stent main body is a cobalt-based alloy, and wherein the complete solid solution alloy is 75 Mo-25 Ta, 50 Mo-50 Ta, 50 Nb-50 W, 25 Nb-75 W, or 50 Ta-50 W, wherein each number indicates % by mole, adding up 100% by mole in total.
Dependencies are inferred from the claim text.