US 12,447,307 B2
Catheters and methods for producing catheters
Yusuke Hoshino, Seto (JP); and Takayuki Yagi, Seto (JP)
Assigned to ASAHI INTECC CO., LTD., Seto (JP)
Filed by ASAHI INTECC CO., LTD., Seto (JP)
Filed on Jul. 28, 2021, as Appl. No. 17/387,843.
Application 17/387,843 is a continuation of application No. PCT/JP2019/004163, filed on Feb. 6, 2019.
Prior Publication US 2021/0353906 A1, Nov. 18, 2021
Int. Cl. A61M 25/00 (2006.01)
CPC A61M 25/005 (2013.01) [A61M 25/0045 (2013.01); A61M 2025/0059 (2013.01); A61M 2207/00 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A catheter comprising:
an outer layer;
an inner layer forming a lumen;
a reinforcing body that is a metal-braided layer arranged outside the inner layer; and
a coil body arranged outside the reinforcing body and covered with the outer layer;
wherein:
a distal end of the inner layer is located proximally of a distal end of the outer layer;
the outer layer has:
a first region extending from the distal end of the outer layer to the distal end of the inner layer; and
a second region which is positioned proximally of the first region and covers the inner layer;
a resin which forms the second region of the outer layer has a lower hardness than a hardness of a resin which forms the first region; and
a distal end of the reinforcing body is located proximally of the distal end of the inner layer, and a distal end of the coil body is located proximally of the distal end of the reinforcing body.