| 摘要 |
A medical guide wire or the like that is comprised in part or entirely of one or more heat activated memory alloys alone or in conjunction with one or more non-heat activated memory materials. The tip or any portion of a guide wire comprised of memory alloy or components thereof can be aimed, deflected or steered on command by applying heat to the alloy. Combining heat activated memory alloys alone or with non-heat activated memory materials in opposite or antagonistic configurations or assemblies permits reversible shape change of the guide wire in any direction. The heat activated or shape memory alloys may be titanium-nickel alloys, titanium-nickel-cobalt alloys, other transition and precious metal alloys or thermoplastic heat settable material which exhibit shape memory characteristics. Heating of the guide wire is accomplished by induction heating, immersion heating, application of RF energy, or by body temperature.
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