Enhanced lubricity guidewire
First Claim
1. A guidewire section suitable for guiding a catheter within a blood vessel, comprisinga.) an elongated flexible metal wire core having a proximal section and a distal tip section.b.) a polymeric tie layer disposed about at least a portion of said distal section,c.) a lubricious polymer layer disposed about the polymeric tie layer, andd.) a malleable metal wire coil disposed about another distally located portion of said distal tip section, said malleable metal wire coil having a section length uncoated by said polymeric tie layer.
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Accused Products
Abstract
This invention is a surgical device. It is a guidewire for use in a catheter and is used for accessing a targeted site in a lumen system of a patient'"'"'s body. The guidewire or guidewire section may be of a stainless steel or a high elasticity metal alloy, preferably a Ni--Ti alloy, having specified physical parameters. The guidewire is especially useful for accessing peripheral or soft tissue targets. A special 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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Citations
24 Claims
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1. A guidewire section suitable for guiding a catheter within a blood vessel, comprising
a.) an elongated flexible metal wire core having a proximal section and a distal tip section. b.) a polymeric tie layer disposed about at least a portion of said distal section, c.) a lubricious polymer layer disposed about the polymeric tie layer, and d.) a malleable metal wire coil disposed about another distally located portion of said distal tip section, said malleable metal wire coil having a section length uncoated by said polymeric tie layer.
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12. A guidewire section suitable for guiding a catheter within a body lumen, comprising
a) an elongated, flexible metal wire core of a super-elastic alloy having a UP of 75 ksi± - 10 ksi, an LP of 25±
7.5 ksi measured at 3% strain and a PS of less than 0.25% where measured in a stress-strain test to 6% strain, andb) a polymeric tie layer coaxially located about the wire area. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
- 10 ksi, an LP of 25±
Specification