A guidewire including a guidewire tip portion including a distal tip portion and a proximal tip portion wherein the tip portion has a circular cross section along substantially both the linear elastic distal tip portion and the superelastic proximal tip portion, Including a constant diameter. The method of manufacture includes providing a superelastic wire (eg, Nitinol) that includes a length to define both the distal tip portion and the proximal tip portion. But the distal tip portion does not impart significant cold working to the proximal tip portion and is cold worked so as to maintain the superelastic properties in the distal tip portion, . The tip portion may be rolled after cold working of the distal tip portion to provide a circular cross section having a desired substantially constant diameter along both the distal tip portion and the proximal tip portion, The cross section thickness is reduced.遠位先端部分と近位先端部分とを含むガイドワイヤ先端部分を含むガイドワイヤであって、先端部分は、線形弾性遠位先端部分及び超弾性近位先端部分の両方に沿って円形断面及び実質的に一定な直径を含む。製造方法は、遠位先端部分及び近位先端部分の両方を定めるような長さを含む超弾性ワイヤ(例えば、ニチノール)を提供することを含む。遠位先端部分内に線形弾性特性をもたらすが、近位先端部分は超弾性特性を維持するよう、遠位先端部分は、近位先端部分に有意な冷間加工を付与せずに冷間加工される。先端部分は、遠位先端部分及び近位先端部分の両方に沿って所望の実質的に一定な直径を有する円形断面をもたらすよう、遠位先端部分の冷間加工後に丸められ、或いはその他の方法において断面厚さが減少させられる。
