Multi-layer and multi-section coils for guide wire
First Claim
1. A method for making a guide wire having a coil, comprising the steps of:
- providing a core wire;
providing a wire;
generating a first property over a first section of said wire;
generating a second property over a second section of said wire, said second property being different from said first property;
forming said wire into a coil; and
securing said coil to said guide wire.
1 Assignment
0 Petitions
Accused Products
Abstract
A guide wire having a coil disposed over the guide wire, wherein the coil is integrally formed of a single wire and has regions of differing properties over its length. Some wire embodiments have longitudinally alternating layer segments having differing properties including radiopacity, lubricity, hydrophilicity, hemo-compatibility, flexibility, malleability, stiffness, and shape memory properties. A coil formed according to the present invention may have numerous distinct property segments, while being formed from only a single wire and requiring only two points for affixation to the guide wire. One wire according to the present invention is made by coating a core wire with alternating materials having different properties. Another wire has alternating layer segments including radiopaque material, such as radiopaque loaded polymer, or a radiopaque metal, bonded to the core wire. One embodiment wire includes alternating regions having the lubricity and/or hydrophilicity varied as between the distal and proximal regions. Some embodiments have alternating regions of varying radiopacity, further having a polymeric coating or layer thereover. In yet other embodiments, a tie-layer is disposed between the core wire and the outer polymeric layer, to serve as a polymer substrate to assist in binding the outer layer to the central core wire. Some embodiments use alternating application of ionizing radiation, a binding agent, or a release agent, to vary the adhesion strength of subsequently applied material over alternating regions, so as to enable removing the subsequently applied material selectively in a subsequent removal step.
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Citations
28 Claims
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1. A method for making a guide wire having a coil, comprising the steps of:
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providing a core wire;
providing a wire;
generating a first property over a first section of said wire;
generating a second property over a second section of said wire, said second property being different from said first property;
forming said wire into a coil; and
securing said coil to said guide wire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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- 20. A guide wire including a distal portion having a coil disposed about said guide wire distal portion, said coil being integrally formed, having a first property over a first section of said coil, having a second property over a second section of said wire, wherein said second property is different from said first property.
Specification