Guidewires having a vapor deposited primer coat
AssigneeAdvanced Cardiovascular Systems, Inc.
InventorsMarc Mehrzad Jalisi, Emmanuel C. Biagtan
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Abstract
An intraluminal device having an adhesive primer coat formed of a carbonaceous material and a lubricious top coat of a hydrophilic polymeric material. The invention also comprises the methods of making such intraluminal devices. The primer coat of the invention may comprise pure carbon, or a carbon based material such as a polymer. Preferably, the primer coat has a thickness of about 0.1 to about 2 μm. In a presently preferred embodiment, the primer coat is applied using chemical vapor deposition (CVD), but in certain embodiments, physical vapor deposition (PVD) may be suitable. The deposited primer coat forms an effective substrate for adhesion of the hydrophilic polymer top coat.
Claims10
A guidewire comprising an elongated core member and a flexible helical coil disposed about a distal end of the core member, the flexible helical coil having a primer coat formed of a carbonaceous material vapor deposited on at least a portion thereof, and a hydrophilic polymer top coat on at least a portion of the primer coat.
A method of making a guidewire having a lubricious surface, comprising applying a primer coat formed on a carbonaceous material on at least a portion of a flexible helical coil disposed about a distal end of an elongate core member of the guidewire by vapor deposition, and then applying a hydrophilic polymeric coat on at least a portion of the primer coat.
Dependencies are inferred from the claim text.