公开(公告)号：US20230062912A1

公开(公告)日：2023-03-02

申请号：US17918991

申请日：2021-03-23

Applicant: NIPRO CORPORATION

Inventor： Yuki NISHIMURA ,  Yoshikazu SAITO ,  Shuntaro ITO

IPC: A61M25/10 ,  A61B18/24

Abstract: An effortless means for deflating a balloon of a catheter. A catheter system includes a catheter, a circuit for making fluid flow through the catheter, and a drive device having a bidirectionally drivable pump and a controller. The catheter includes an inflatable balloon, and a first lumen and a second lumen that allow the fluid to flow through the balloon. The controller drives the pump in a first direction to make the fluid flow from a buffer tank via a first flow path into the first lumen and to make the fluid flow out from the second lumen via a second flow path to the buffer tank, and drives the pump in a second direction opposite to the first direction to make the fluid flow from the first lumen via the first flow path into the buffer tank.

公开(公告)号：US20240206971A1

公开(公告)日：2024-06-27

申请号：US18556574

申请日：2022-03-31

Applicant: NIPRO CORPORATION

Inventor： Yuki NISHIMURA ,  Shuntaro ITO

IPC: A61B18/24 ,  A61B18/00 ,  A61B18/22 ,  A61M25/10

CPC classification number: A61B18/24 ,  A61B2018/00285 ,  A61B2018/00577 ,  A61B2018/2272 ,  A61M2025/1061

Abstract: In an ablation catheter, a lumen of an inner tube and a lumen of an outer tube are communicated and a fluid circulation passage is formed inside a balloon provided on the distal end side of the outer tube, and an optical fiber is moveably inserted in the inner tube. On the distal end side of the optical fiber, a reflector reflects a laser beam guided by the optical fiber to the outer periphery for irradiation. A tubular housing member is provided that positions and fixes the distal end part of the optical fiber and the reflector. A protection tube extending from the proximal end side of the housing member is slipped and installed externally around the optical fiber, and the protection tube is more flexible than the housing member.