Deformable tip super elastic guidewire
First Claim
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1. A guidewire suitable for guiding a catheter within a body lumen, comprising 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.
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Abstract
This invention is a surgical device. It is a guidewire for use in a catheter and is used for accessing a targeted site within a system of lumen within a patient'"'"'s body. The guidewire may be of a high elasticity metal alloy, preferably a Ni-Ti alloy, having specified physical parameters, and is especially useful for accessing peripheral or soft tissue targets. The "necked" guidewire tip also forms a specific parameter of the invention.
198 Citations
28 Claims
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1. A guidewire suitable for guiding a catheter within a body lumen, comprising 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
- 10 ksi, an LP of 25 ±
- 23. A guidewire suitable for guiding a catheter within a blood vessel, comprising an elongated flexible metal wire core having a distal section, wherein the distal section comprises a necked down portion having a diameter smaller than a section just distal of the necked down portion and wherein an outer coil surrounds at least a portion of the distal section, such portion of the distal section comprising at least the smaller diameter portion and wherein a metallic ribbon secures the outer coil to the smaller diameter portion of the distal section.
Specification