US 12,472,330 B2
Catheter
Toshiya Kisa, Okaya (JP)
Assigned to KANEKA CORPORATION, Osaka (JP)
Appl. No. 18/014,302
Filed by KANEKA CORPORATION, Osaka (JP)
PCT Filed Jun. 2, 2021, PCT No. PCT/JP2021/021005
§ 371(c)(1), (2) Date Jan. 3, 2023,
PCT Pub. No. WO2022/009566, PCT Pub. Date Jan. 13, 2022.
Claims priority of application No. 2020-117631 (JP), filed on Jul. 8, 2020.
Prior Publication US 2023/0256203 A1, Aug. 17, 2023
Int. Cl. A61M 25/01 (2006.01)
CPC A61M 25/0147 (2013.01) [A61M 2025/015 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A catheter, comprising:
a shaft having a distal end, a proximal end, and a lumen extending in a longitudinal direction;
at least one wire having a distal end and a proximal end, the proximal end being disposed at a proximal end part of the shaft, and a distal end part of the wire being fixed to a distal end part of the shaft;
a coil having a distal end, a proximal end, and a lumen in which the wire is disposed and extending in the longitudinal direction in the lumen of the shaft;
a leaf spring having a distal end and a proximal end and extending in the longitudinal direction in the lumen of the shaft;
a cover tube having a distal end, a proximal end, and a lumen extending in the longitudinal direction in the lumen of the shaft, and
a fixed part where the coil is fixed to the shaft at a position proximal to the proximal end of the cover tube, wherein
the leaf spring has a first connection part where a proximal end part of the leaf spring is fixed to a distal end part of the coil, and a second connection part where a distal end part of the leaf spring is fixed to a distal end part of the shaft;
the wire, the leaf spring, and a distal part of the coil including the first connection part are disposed in the lumen of the cover tube;
the proximal end of the cover tube is positioned distal to the proximal end of the coil;
a distal end of the fixed part and the proximal end of the cover tube are separated; and
a length from the distal end of the fixed part to the proximal end of the cover tube in the longitudinal direction is a length of 20 windings of the coil or shorter.