US 12,213,729 B2
Catheter and recanalization catheter system
Osamu Katoh, Seto (JP); Wayne Ogata, Seto (JP); Yukiko Hase, Seto (JP); Kensuke Sakata, Seto (JP); and Takayuki Hori, Seto (JP)
Assigned to ASAHI INTECC CO., LTD., Seto (JP)
Filed by ASAHI INTECC CO., LTD., Seto (JP)
Filed on Sep. 21, 2020, as Appl. No. 17/026,901.
Application 17/026,901 is a continuation of application No. PCT/US2019/024752, filed on Mar. 29, 2019.
Claims priority of provisional application 62/650,149, filed on Mar. 29, 2018.
Prior Publication US 2021/0052321 A1, Feb. 25, 2021
Int. Cl. A61B 18/14 (2006.01); A61M 25/00 (2006.01); A61M 25/09 (2006.01); A61B 18/00 (2006.01)
CPC A61B 18/1492 (2013.01) [A61M 25/0071 (2013.01); A61M 25/09 (2013.01); A61B 2018/00077 (2013.01); A61B 2018/00214 (2013.01); A61B 2018/00577 (2013.01); A61B 2018/00982 (2013.01); A61B 2018/1467 (2013.01); A61M 2025/09008 (2013.01); A61M 2205/3327 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A catheter comprising:
an outer shaft;
a first inner shaft having a first lumen;
a second inner shaft having a second lumen arranged adjacent to the first lumen in a radial direction of the outer shaft,
a plasma guide wire configured to be inserted into the second lumen and slidably disposed therein, and including a distal-end tip made of a metal material having electrical conductivity; wherein
an extended shaft portion of the first inner shaft that is provided on a distal end side of a distal end face of the outer shaft extends in a longitudinal direction of the first inner shaft, the extended shaft portion including (i) the first lumen and (ii) a distal end portion located on a distal end side of a distal end portion of the second lumen; and
an electrode disposed on an outer circumferential surface of the outer shaft, wherein
the electrode generates plasma between the electrode and the distal-end tip of the plasma guide wire, and
the surface area of the electrode is larger than the surface area of the distal-end tip of the plasma guide wire.