Guidewire with a variable stiffness distal portion

Details Guidewire with a variable stiffness distal portion Guidewire with a variable stiffness distal portion

1996-04-18

1999-08-03

Coggins, Wynn Wood

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604 95, A61M 2500

Patent

active

059318198

ABSTRACT:
A guidewire having a core section formed of a NiTi alloy which is in an austenite phase when being manufactured but which is converted to the martensite phase at operating (body) temperature (37.degree. C.) and can be transformed to an austenite phase by heating to a temperature above body temperature but below 50.degree. C. When in the austenite phase, the core section is at a high strength level which ensures the tracking of a catheter over the guidewire within a patient's body lumen. In one preferred embodiment the core section is heated by electrical resistance or inductance.

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