Patent ID: 8182432

Claim:
A guidewire for a device useable in ear, nose and throat procedures, the guidewire comprising: a core wire including: a proximal portion having a length, a first constant cross-sectional area with a circular shape extending a length of the proximal portion and to a proximal terminal end of the core wire; a cylindrical distal tip having a second cross-sectional area; and a transitional portion between and adjacent the proximal portion and the distal tip, the transitional portion having a length equal to or less than the length of the proximal portion, a first minimum cross-sectional dimension perpendicular to a second maximum cross-sectional dimension and a third cross-sectional area that is constant along a length of the transitional portion, the length being greater than the second maximum cross-sectional dimension, wherein the second cross-sectional area is greater than the third cross-sectional area, is approximately equal to the first cross-sectional area, and has a diameter less than the second maximum cross-sectional dimension; an outer coil; and an inner coil, the inner coil disposed about the cylindrical distal tip and a portion of the transitional portion and within the outer coil.