GUIDE WIRE CORE WIRE MADE FROM A SUBSTANTIALLY TITANIUM-FREE ALLOY FOR ENHANCED GUIDE WIRE STEERING RESPONSE

摘要

Guide wire devices and methods for their manufacture. Guide wire devices include an elongate guide wire member that includes at least one section fabricated from a substantially titanium-free Co—Ni—Cr—Mo alloy. The substantially titanium-free Co—Ni—Cr—Mo alloy exhibits superior stiffness (i.e., greater Young's and shear moduli) as compared to stainless steel (e.g., 304V stainless steel) and nickel-titanium (Ni—Ti) and a greater yield strength as compared to stainless steel. Increasing the Young's and shear moduli can significantly improve torque transmission and steerability of the guide wire device and increasing the yield strength can significantly improve the kink resistance of the guide wire device.

主权项

1. A method for fabricating a guide wire device, comprising:
fabricating an elongate guide wire member having a proximal section and a distal section, wherein at least the distal section is fabricated from a cobalt-nickel-chromium-molybdenum (Co—Ni—Cr—Mo) alloy that comprises less than 0.05% of titanium by weight; and imparting at least 50% to 95% cold work to at least a portion of the Co—Ni—Cr—Mo alloy to yield a Co—Ni—Cr—Mo alloy having a Young's modulus of at least about 230 GPa and a yield strength of about 1 GPa to about 2 GPa.