Composite braided guidewire
First Claim
1. A guidewire suitable for guiding a catheter within a body lumen, comprising:
- an elongated, flexible core wire having a proximal section including a stainless steel alloy, a distal section including a stainless steel alloy, and a section intermediate the proximal section and the distal section including a super-elastic alloy;
a tubular braid having a length and a wall thickness, the length of the tubular braid extending from a location proximal of the distal section of the core wire to a distal end of the distal section of the core wire, the tubular braid coaxially disposed about the core wire such that the maximum radial gap between the tubular braid and the core wire is less than the wall thickness of the tubular braid along the entire length of the tubular braid; and
a distal coil disposed coaxially over the core wire.
1 Assignment
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Accused Products
Abstract
This is a composite guidewire for use with a catheter for accessing a targeted site in a lumen system of a patient'"'"'s body. The 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. The invention includes multi-section guidewire assemblies having super-elastic alloy or stainless steel ribbon braided reinforcements along a least a portion of the core. A variation of the inventive guidewire includes a braid and a tie layer (and one or more lubricious polymers on the tie layer exterior) to enhance the guidewire'"'"'s suitability for use within catheters and within the interior of vascular lumen.
121 Citations
13 Claims
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1. A guidewire suitable for guiding a catheter within a body lumen, comprising:
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an elongated, flexible core wire having a proximal section including a stainless steel alloy, a distal section including a stainless steel alloy, and a section intermediate the proximal section and the distal section including a super-elastic alloy; a tubular braid having a length and a wall thickness, the length of the tubular braid extending from a location proximal of the distal section of the core wire to a distal end of the distal section of the core wire, the tubular braid coaxially disposed about the core wire such that the maximum radial gap between the tubular braid and the core wire is less than the wall thickness of the tubular braid along the entire length of the tubular braid; and a distal coil disposed coaxially over the core wire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification