Guidewire
First Claim
1. A urological guidewire, comprising:
- a core formed of a first metallic material and extending toward an end of the guidewire;
a coil including a plurality of convolutions extending around the core at the end of the guidewire, the coil being formed of a second metallic material different than the first metallic material; and
a mechanical interlock formed between the coil and the core to inhibit separation of the coil from the core.
1 Assignment
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Accused Products
Abstract
A urological guidewire includes a core formed of a first metallic material and extending toward an end of the guidewire. A coil having a plurality of convolutions is disposed around the core at the end of the guidewire, the coil being formed of a second metallic material different than the first metallic material. A mechanical interlock is formed to inhibit separation of the different materials forming the coil and the core. The mechanical interlock may include an enlargement at the end of the core and a bonding material fixing the enlargement to the coil. The convolutions may include a penultimate convolution with a first radius of curvature and an ultimate convolution having a second, shorter radius of curvature to form a bridge. In this case, portions of the core can be bent back on themselves and directed over or around the bridge to form the mechanical interlock.
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Citations
15 Claims
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1. A urological guidewire, comprising:
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a core formed of a first metallic material and extending toward an end of the guidewire;
a coil including a plurality of convolutions extending around the core at the end of the guidewire, the coil being formed of a second metallic material different than the first metallic material; and
a mechanical interlock formed between the coil and the core to inhibit separation of the coil from the core. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for manufacturing a guidewire having a core and a coil spiraled in a plurality of convolutions around the core, comprising the steps of:
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forming the core of a first metallic material;
forming the coil of a second metallic ;
material different than the first metallic material; and
mechanically interlocking the coil and the core. - View Dependent Claims (9, 10, 11, 12, 13)
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14. The urological guidewire, comprising:
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a distal section having a first flexibility, a first lubricity, and a first length;
a central section having a second flexibility, a second lubricity, and a second length;
a proximate section having a third flexibility, a third lubricity, and a third length;
the third flexibility being greater than the second flexibility and less than the first flexibility;
the second lubricity and the third lubricity being less than the first lubricity; and
the first length being greater than the third length and less than the second length.
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15. The urological guidewire, comprising:
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a core formed of a first metallic material and extending toward an end to the guidewire;
a coil including a plurality of convolutions extending around the core at the distal end of the guidewire, the coil being formed of a second metallic material different than the first metallic material; and
a mechanical interlock formed between the coil and the core to inhibit separation of the coil from the core.
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Specification