| 摘要 |
PROBLEM TO BE SOLVED: To prevent a guidewire from undesirably advancing further into the vasculature of a patient during use.SOLUTION: A guidewire 10 includes an elongate body 12 that defines a proximal end 14 and a distal end 16. A guidewire body 12 further defines a shaped portion 30 that is positioned intermediate the proximal and distal ends. The shaped portion 30 of the guidewire 10 is at least partially composed of a shape memory material, such as nitinol, and is deflected from a longitudinal axis 32 defined by an undeflected portion of the guidewire body 12. The shaped portion 30 is disposed in one embodiment at the proximal end 14 of the guidewire. In another embodiment, a proximal portion of the nitinol guidewire can be treated to impart malleability and enable deflection by a clinician. Methods for forming the shaped or malleable guidewire to include a deflected portion are disclosed. |
