Guide wire having tubular connector with helical slits
AssigneeTerumo Kabushiki Kaisha
InventorsSyunichi Uchino, Kenichi Yasuda
Life of this patent
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Abstract
A guide wire includes a first wire located at the distal end of the guide wire, a second wire located at the proximal end of the guide wire and having a flexural rigidity greater than that of the first wire, and a tubular connector for joining the first and second wires. The connector has one or more grooves or slits formed on the distal side of the boundary between the first wire and the second wire. The connector is formed of a material different from the material of the first wire. The proximal portion of the first wire is provided with a thin metal coating. The first wire is joined to the connector by brazing at the portion provided with the thin metal coating.
Claims22
A guide wire, comprising a first wire which is located on a distal end of the guide wire, a second wire which is located on a proximal end of the guide wire and has a flexural rigidity greater than that of said first wire, and a tubular connector joining said first and second wires, said connector having a groove or a slit or both formed in its portion on a distal side of a boundary between said first wire and said second wire, the flexural rigidity of a portion of the connector on the distal side of the boundary between said first wire and said second wire changes smoothly along its length.
A guide wire comprising a first wire which is located on a distal end of the guide wire, a second wire which is located on a proximal end of the guide wire and has a flexural rigidity greater than that of said first wire, and a tubular connector for joining said first and second wires, said connector being formed of a material different from a material of said first wire, a proximal portion of said first wire joined to said connector being provided with a thin metal coating as an adjuvant to joining, said first wire being joined to said connector by brazing, and a helical slit formed in a proximal end portion of the connector.
A guide wire, comprising a first wire located on a distal end of the guide wire, a second wire located on a proximal end of the guide wire and having a flexural rigidity greater than that of said first wire, and a tubular connector joining said first and second wires, said connector having a groove, a slit or both a groove and a slit formed in its portion located on a distal side of a boundary between said first wire and said second wire, said second wire being made of a metal whose rigidity is greater than that of the first wire and said connector being made of the same or same kind of material as said second wire, the rigidity of the guide wire increasing smoothly from a proximal end portion of said first wire to a distal end portion of said second wire.
Dependencies are inferred from the claim text.