Super-elastic composite guidewire

Details Super-elastic composite guidewire Super-elastic composite guidewire

A - Human Necessities

61

M

A61M 25/09 (2006.01) A61L 29/00 (2006.01) A61M 25/01 (2006.01)

Patent

CA 2177426

This is a composite guidewire for use in a catheter and is used for accessing a targeted site in a lumen system of a patient's body. Tne guidewire core or guidewire section may be of a stainless steel or a high elasticity metal alloy, preferably a Ni-Ti alloy, also preferably having specified physical parameters. The composite guidewire assembly is especially useful for accessing peripheral or soft tissue targets. Variations include multi-section guidewire assemblies having (at least) super-elastic distal portions and super-elastic braided reinforcements along the mid or distal sections. A variation of the inventive guidewire includes the coating of the wire with a tie layer and then with a one or more lubricious polymers to enhance its suitability for use within catheters and with the interior of vascular lumen.

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