Guide wire for a catheter

Details Guide wire for a catheter Guide wire for a catheter

1991-10-11

1993-07-27

Hindenburg, Max

Surgery

Truss

Pad

604280, A61B 500

Patent

active

052303489

ABSTRACT:
A guide wire for a catheter is disclosed that includes a core wire and a sheath for covering at least the distal end of the core wire. The core wire is formed from a nickel-titanium alloy having a nickel-titanium ratio in the range of 3:2 to 1:1. The core wire is worked in a manner such that in a tensile test wherein the core wire is elongated by at least 5%, the core wire has a recovery percentage of at least 90%. Additionally, elongations in the range of zero and 5% do not cause any stress-induced martensitic transformations and/or austinite reverse transformations. Thus, the load-elongation characteristics of the nickel-titanium alloy are such that the load increasing rate is either proportional or gradually decreasing throughout the elongation range of 0 to 5%.

REFERENCES:
patent: 4876126 (1989-10-01), Takamura
patent: 4925445 (1990-05-01), Sakamoto et al.

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