US 12,465,728 B2
Guide wire
Shinji Kondo, Ebina (JP)
Assigned to TERUMO KABUSHIKI KAISHA, Tokyo (JP)
Filed by TERUMO KABUSHIKI KAISHA, Tokyo (JP)
Filed on Sep. 3, 2021, as Appl. No. 17/466,477.
Application 17/466,477 is a continuation of application No. PCT/JP2020/005538, filed on Feb. 13, 2020.
Claims priority of application No. 2019-038773 (JP), filed on Mar. 4, 2019.
Prior Publication US 2021/0393927 A1, Dec. 23, 2021
Int. Cl. A61M 25/09 (2006.01)
CPC A61M 25/09 (2013.01) [A61M 2025/09058 (2013.01); A61M 2025/09183 (2013.01); A61M 2025/09191 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A guide wire for guiding a tubular elongated body to be inserted into a living body, the guide wire comprising:
a flexible elongated shaft portion, the shaft portion includes a diameter decreasing portion between a proximal end portion of the shaft portion and a distal end portion of the shaft portion;
a puncture portion configured to form a hole in a biological tissue, the puncture portion being at the distal end portion of the shaft portion;
a cover portion that is formed of a wire member wound in a spiral shape, the cover portion being fixed to the shaft portion and includes a contraction portion that is contractible and covers the puncture portion;
the contraction portion being configured such that the puncture portion protrudes from the cover portion by contraction of the contraction portion in a linear state;
when the contraction portion is in a curved state, the contraction portion is restricted in contraction so that the puncture portion does not protrude from the cover portion by contact of adjacent wire members on a concave side of the contraction portion; and
wherein the shaft portion includes a curved portion, and when the contraction portion is in the curved state, the contraction portion axially overlaps the curved portion of the shaft portion.