Patent ID: 6409683
Filing Date: 2002-06-25
Classification: A61M

Abstract:
A medical guidewire comprising:an elongated corewire having proximal and distal ends and having a first, uniform diameter proximal portion and a second flexible, reduced diameter distal portion; a coiled wire spring having distal and proximal ends and including a distal portion comprised of tightly spaced coil turns and a proximal portion comprised of loosely spaced coil turns, said coiled wire spring is formed of a wire having a cylindrical cross section of a predetermined diameter and in which adjacent turns of the loosely spaced coil turns are spaced apart at least five times the diameter of the wire in the coiled wire spring; bonding means for attaching the distal end of the coiled wire spring to the distal end of the corewire; and, bonding means for attaching the entire portion of the coiled wire spring comprised of the loosely spaced coil turns to the uniform diameter portion of the corewire.