05551444 is referenced by 87 patents and cites 18 patents.

A guidewire includes a tapered core, an elongated non-radiopaque inner coil that is coincident with the core and extends over a distal portion of the core, and a radiopaque outer coil that fits over a distal end of the inner coil. The inner coil tapers between its proximal end and distal end, to form a tapered distal end section. The outer diameter of the proximal end of the inner coil is the same as the outer diameter of the proximal end of the core, before its first taper, and similarly, the outer diameter of the outer coil is the same as the outer diameter of the inner coil before its taper. Accordingly, the guidewire has an essentially uniform outer diameter over its entire length. A rounded tip that acts as a deformable buffer is formed where the distal ends of the two coils and the core join. The distal end of the core is preferably flattened to provide a formable end to the guidewire. A low friction coating may be added to the wire, to facilitate movement of the wire through the arteries.

Title
Flexible guidewire with radiopaque outer coil and non-radiopaque inner coil
Application Number
8/456037
Publication Number
5551444
Application Date
May 31, 1995
Publication Date
September 3, 1996
Inventor
Maureen Finlayson
Acton
MA, US
Agent
Cesari and McKenna
Assignee
Radius Medical Technologies
MA, US
IPC
A61B 5/00
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