초록 ▼

Cold worked nickel-titanium alloys that have linear pseudoelastic behavior without a phase transformation or onset of stress-induced martensite as applied to a medical device having a strut formed body deployed from a sheath. In one application, an embolic protection device that employs a linear pse

Cold worked nickel-titanium alloys that have linear pseudoelastic behavior without a phase transformation or onset of stress-induced martensite as applied to a medical device having a strut formed body deployed from a sheath. In one application, an embolic protection device that employs a linear pseudoelastic nitinol self-expanding strut assembly with a small profile delivery system for use with interventional procedures. The expandable strut assembly is covered with a filter element and both are compressed into a restraining sheath for delivery to a deployment site downstream and distal to an interventional procedure. Once at the desired site, the restraining sheath is retracted to deploy the embolic protection device, which captures flowing emboli generated during the interventional procedure. Linear pseudoelastic nitinol is used in the medical device as distinct from non-linear pseudoelastic (i.e., superelastic) nitinol.

대표청구항 ▼

What is claimed is: 1. A method of making an intralumen device, comprising:receiving tubing made from a nickel-titanium alloy that is in a substantially fully martensitic state;forming a plurality of struts in the received tubing to form a body;cold working the body at least about 38 percent as meas

What is claimed is: 1. A method of making an intralumen device, comprising:receiving tubing made from a nickel-titanium alloy that is in a substantially fully martensitic state;forming a plurality of struts in the received tubing to form a body;cold working the body at least about 38 percent as measured by reduction in cross-sectional area, the nickel-titanium alloy remaining in the substantially fully martensitic state following the cold working;heat treating the cold-work body under conditions so that the cold-work body remains in the substantially fully martensitic state; andincorporating the heat-treated cold-worked body into the intralumen device.