Devices configured from heat shaped, strain hardened...

Details Devices configured from heat shaped, strain hardened... Devices configured from heat shaped, strain hardened...

2011-05-10

2011-05-10

Bui, Vy Q (Department: 3773)

Surgery

Instruments

Internal pressure applicator

C606S108000

Reexamination Certificate

active

07938843

ABSTRACT:
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 is disclosed. 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 is disclosed. 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.

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