Intravascular radially expandable stent and method of implant
AssigneeMedtronic, Inc.
InventorDominik M. Wiktor
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Abstract
A device to be used as a vascular stent comprising a cylindrical open-ended wire component made of a low memory metal such as copper alloy, titanium, or gold, providing a radial support from within a blood vessel after implantation therein. The coronary stent is characterized by its ability to be expanded radially to a larger diameter after initial implantation and means for causing said stent to expand to a larger diameter and a method for transporting, positioning and implantation of such coronary stent transluminarely to have said stent act as a permanent prosthesis to assure vascular patency. And method for simultaneous angioplasty and stent implant procedure.
Claims13
A radially expandable stent for implantation within a body vessel, comprising
- a wire formed winding in a hollow cylindrical shape,
- the winding including a preformed zig-zag type pattern continuous wire formed flat band,
- the flat band wound into a continuous helix the length of the stent, and
- a full loop terminating both ends of zig-zag preformed wire band.
A radially-expandable stent for implantation within a body vessel comprising:
- a stent body having a wall of generally cylindrical shape formed of a helical coil made of a wire, the body having a longitudinal axis and a first diameter;
- zig-zag means in the wire for allowing radial expansion of the cylindrical stent body from the first diameter to a second larger diameter without significantly altering body length along the longitudinal axis.
A method of forming a radially-expandable stent for implantation within a body vessel comprising:
- bending a wire in a zig-zag pattern;
- and
- winding the wire around a form in a coil.
A method of forming a radially-expandable stent for implantation within a body vessel comprising:
- forming a wire into a sinusoidal shape;
- forming the wire into a coil having a first diameter and a first longitudinal length, so that later radial outward deformation of the cylinder to a second larger diameter does not significantly alter the longitudinal length.
A stent for implantation within a body vessel comprising:
- a cylindrical stent body formed of a continwous wire, the stent body having a first diameter and a first length along a longitudinal axis, the wire lying generally at an acute angle to a line through the cylindrical body parallel to the longitudinal axis;
- and
- zig-zag means in the wire for allowing radial outward expansion of the body without significantly altering the length of the body.
Dependencies are inferred from the claim text.