Guidewire having hydrophilic coating
First Claim
Patent Images
1. A method for coating a guidewire, said method comprising:
- providing a guidewire having a proximal end and a distal coil comprising a wound filament having a plurality of successive spaced apart turns;
providing a reservoir having an aperture in a bottom surface thereof;
introducing a coating solution into the reservoir;
passing the guidewire upwardly through aperture so that a layer of the coating solution adheres to the outer surface of the guidewire; and
curing the coating solution to form a hydrophilic coating on the outer surface of the guidewire.
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Abstract
A guidewire comprises a core wire having a coil tip at its distal end. The coil tip includes a helically wound filament having adjacent turns spaced apart by a preselected distance. The guidewire is coated with a polymeric material, typically a hydrophilic polysaccharide, such as hyaluronic acid or chondroitin sulfate. By properly selecting the spacing between adjacent turns of the coil tip, the hydrophilic coating will adhere to the coil tip in a manner which does not penetrate the coil and which does not significantly interfere with flexibility and bendability of the coil tip.
101 Citations
17 Claims
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1. A method for coating a guidewire, said method comprising:
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providing a guidewire having a proximal end and a distal coil comprising a wound filament having a plurality of successive spaced apart turns; providing a reservoir having an aperture in a bottom surface thereof; introducing a coating solution into the reservoir; passing the guidewire upwardly through aperture so that a layer of the coating solution adheres to the outer surface of the guidewire; and curing the coating solution to form a hydrophilic coating on the outer surface of the guidewire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for coating a guidewire, said method comprising:
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providing a guidewire having a proximal end and a distal coil; providing a reservoir having an aperture in a bottom surface thereof; introducing a coating solution into the reservoir, said coating solution selected from the group consisting of a polyvinylpyrrolidone or a polysaccharide; passing the guidewire upwardly through aperture so that a layer of the coating solution adheres to the outer surface of the guidewire; and curing the coating solution to form a hydrophilic coating on the outer surface of the guidewire. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification