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US 5,129,890 AGranted
Hydrophilically coated flexible wire guide
AssigneeCook Incorporated
InventorsBrian L. Bates, Thomas A. Osborne
Life of this patent
Estimating the term…
Abstract
A wire guide comprising an elongate central core and a coil formed of radiopaque material which is positioned substantially concentrically with the elongate central core. The wire guide also comprises a polymer sleeve which encloses the elongated central core. The guide wire further comprises a hydrophilic coating which substantially encloses the polymer sleeve.
Claims16
A wire guide comprising:
- a mandrel of shape memory material, said mandrel having a distal end and a proximal end;
- a distal end portion of radiopaque material having a distal end and a proximal end, said distal end portion of radiopaque material being secured to the distal portion of said mandrel of shape memory material;
- a first thin coating of polymeric material applied along the length of said mandrel from the proximal end of said mandrel to the proximal end of said distal end portion of radiopaque material;
- a second thin coating of hydrophilic material applied along the length of said first coating from the proximal end of said distal end portion of radiopaque material to a point short of the proximal end of said mandrel and terminating thereat, whereby said first thin coating of polymeric material is exposed near the proximal end of said wire guide;
- and
- wherein said first thin coating of polymeric material has a substantially higher coefficient of friction than said second thin coating of hydrophilic material, and wherein said first thin coating of polymeric material forms a bonding base between said shape memory material and said hydrophilic material along the length of said hydrophilic material and further facilitates gripping and handling of said wire guide near the proximal end of said wire guide.
3 more elements
A wire guide comprising:
- a mandrel of shape memory material, said mandrel having a distal end and a proximal end;
- a coil of radiopaque material having a distal end and a proximal end, said coil being secured to the distal portion of said mandrel of shape memory material and being positioned substantially concentrically thereabout;
- a first thin coating of polymeric material applied along the length of said mandrel from the proximal end of said mandrel to the proximal end of said coil;
- a second thin coating of hydrophilic material applied along the length of said first coating from the proximal end of said coil to a point short of the proximal end of said mandrel and terminating thereat, whereby said first thin coating of polymeric material is exposed near the proximal end of said wire guide;
- and
- wherein said first thin coating of polymeric material has a substantially higher coefficient of friction than said second thin coating of hydrophilic material, and wherein said first thin coating of polymeric material forms a bonding base between said shape memory material and said hydrophilic material along the length of said hydrophilic material and further facilitates gripping and handling of said wire guide near the proximal end of said wire guide.
3 more elements
Dependencies are inferred from the claim text.