Composite guidewire
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United States of America Patent
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Jul 22, 2003
Issued Date -
N/A
app pub date -
Aug 2, 2002
filing date -
Dec 28, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
The composite guidewire includes an elongated, flexible core formed from a nickel titanium alloy, with a distal tapered portion, a reinforcement tube disposed over the proximal region of the core, a primary coil disposed over the tapered distal region of the core, and a coating of a heat shrinkable material. A distal tip is secured to the distal end of the core. The proximal reinforcement member has a distal tapered portion, to provide for a transition in stiffness of the guidewire. The heat shrinkable coating is formed from an elongated tube of polytetrafluoroethylene, and the distal primary coil is formed from one or more nickel titanium alloy strands or wires, one or more platinum wires, or a combination. The distal tip may be formed of platinum or a tantalum filled epoxy.
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