Guide wire
AssigneeTerumo Kabushiki Kaisha
InventorsNoriyuki Tamai, Katsuhiro Shirakawa, Hiroshi Yagi
Life of this patent
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Abstract
The guide wire is a guide wire includes a distal portion and a main body portion. This guide wire is provided with a first curve portion; a second curve portion included on the distal side of aforesaid first curve portion and curved to the opposite direction with respect to aforesaid first curve portion; a third curve portion included on the distal side of aforesaid second curve portion and curved to the opposite direction with respect to aforesaid second curve portion, wherein a line contacting with both aforesaid first curve portion and aforesaid third curve portion has an obtuse angle with respect to an axis line of aforesaid main body portion.
Claims2
A method of advancing a guide wire through a main blood vessel having a side-branch and to a target site, the guide wire comprising a curved distal portion including a first curve portion curving in a direction of curvature, a second curve portion distal of the first curve portion and curving in a direction of curvature opposite the direction of curvature of the first curve portion, a third curve portion distal of the second curve portion and curving in a direction of curvature opposite the direction of curvature of the second curve portion, and a distal most tip on a distal side of the third curve portion, each of the first, second and third curve portions having a shape that is curved in a state of the guide wire in which an external force is not applied to the guide wire, the method comprising:
- advancing at least the curved distal portion into the main blood vessel in a direction that leads to the target site, the advancing causing the distal most tip of the curved distal portion to enter the side-branch;
- when the distal most tip of the curved distal portion enters the side-branch, bending the second curve portion;
- and
- continuing to advance the curved distal portion through the main blood vessel in the direction that leads to the target site, with the second curve portion being set at a forefront.
Dependencies are inferred from the claim text.