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公开(公告)号：US12133735B2
公开(公告)日：2024-11-05
申请号：US17310795
申请日：2019-03-26
Applicant: JAPAN LIFELINE CO., LTD.
Inventor： Yuto Iijima
Abstract: To prevent unintended concentration of radially protruding arm members. An electrode catheter (1) includes a catheter body (10) and an electrode unit (100) attached to a distal-end portion (10a) of the catheter body. The electrode unit includes a plurality of arm members (110) in which a one-end portion (110a) in a longitudinal direction is supported by the catheter body and the other-end portion (110b) in a longitudinal direction radially protrudes from the distal-end portion of the catheter body, ring-shaped electrodes (120) attached to the arm members, and core wires (130) as regulating units that regulate actions of adjacent ones of the arm members.
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公开(公告)号：US20240268745A1
公开(公告)日：2024-08-15
申请号：US18436204
申请日：2024-02-08
Applicant: Japan Lifeline Co., Ltd.
Inventor： Kenji MORI , Toshiyuki IIJIMA , Keisuke ADACHI
CPC classification number: A61B5/367 , A61B5/263 , A61B5/287 , A61B5/6858
Abstract: An electrode catheter includes a base material having a thin-film shape, a shape support structure of the base material, and a plurality of electrodes provided on the base material. At least some of the plurality of electrodes are exposed on a front surface and a back surface of the base material. This can improve followability with respect to a dissection.
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公开(公告)号：US20240108403A1
公开(公告)日：2024-04-04
申请号：US18478390
申请日：2023-09-29
Applicant: Japan Lifeline Co., Ltd.
Inventor： Tomoharu KOISO , Hiroki KAMIYAMA , Shingo HAYASHIDA
CPC classification number: A61B18/1492 , A61M25/005 , A61B2018/00077
Abstract: An electrode catheter includes a catheter shaft including a shaft main body enclosing a first lumen and a second lumen separated from each other, and a reinforcement layer embedded into the shaft main body, an electrode having a ring shape and mounted to an outer peripheral portion of the shaft main body, and a lead wire electrically conductive to the electrode and inserted into the first lumen. The reinforcement layer has conductivity and, inside the electrode, surrounds the second lumen without surrounding the first lumen.
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公开(公告)号：US20230404661A1
公开(公告)日：2023-12-21
申请号：US18447933
申请日：2023-08-10
Applicant: Japan Lifeline Co., Ltd.
Inventor： Kohei SAKAKI
IPC: A61B18/14
CPC classification number: A61B18/1492 , A61B2018/00267
Abstract: A catheter according to an embodiment of the disclosure includes a catheter shaft extending in an axial direction and having a near-distal end structure including a plurality of electrodes, and a handle mounted on a proximal end side of the catheter shaft. The handle includes a handle body extending in the axial direction, and an operation mechanism configured to be rotatable with respect to the handle body about a rotation axis extending along the axial direction. The operation mechanism is rotationally operated when the near-distal end structure is rotationally operated about the rotation axis while a length of the near-distal end structure in the axial direction is fixed.
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公开(公告)号：US20230329535A1
公开(公告)日：2023-10-19
申请号：US18026891
申请日：2020-10-20
Applicant: JAPAN LIFELINE CO., LTD.
Inventor： Yuki KODAMA
CPC classification number: A61B1/0057 , A61B1/018 , A61B1/0052
Abstract: A medical device is configured such that a distal end of an operation wire is securely fixed to a distal end of a shaft, enabling smooth distal end deflection operation. The medical device includes: a shaft that includes a distal end flexible portion and in which working lumens and wire lumens are formed; a distal end tip disposed on a distal end side of the shaft and in which distal end working lumens in communication with the working lumens are formed; an intermediate member disposed between the shaft and the distal end tip and including a main through-hole that is formed to secure communication paths with the working lumens and the distal end working lumens and surround the communication paths, and sub-through-holes that are formed to correspond to the positions in which the wire lumens are formed.
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公开(公告)号：US11534236B2
公开(公告)日：2022-12-27
申请号：US16894785
申请日：2020-06-06
Applicant: Japan Lifeline Co., Ltd.
Inventor： Kenji Mori
Abstract: An ablation needle device can maintain flexibility of an injection needle even when the length of an electrode constituted at a distal end portion thereof is increased and can perform cooling with small nonuniformity in the electrode during ablation. The ablation needle device includes: a hollow needle that is composed of a proximal end portion that is insulation-coated and a distal end portion constituting an electrode; a hub that includes a liquid injection port and a discharge port; an electric connector; a thermocouple; and cooling liquid introducing pipes each of which extends in the inside of the hollow needle, each of which has a distal end positioned in the inside of the distal end portion of the hollow needle, and each of which ejects liquid injected from the injection port from a distal end opening thereof.
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公开(公告)号：US11272978B2
公开(公告)日：2022-03-15
申请号：US16018839
申请日：2018-06-26
Applicant: Japan Lifeline Co., Ltd.
Inventor： Kenji Mori
Abstract: An ablation needle device is a needle device intended for an ablation treatment of an adrenal tumor with transvenous introduction of an injection needle into an adrenal gland. The ablation needle device includes a metal injection needle including a pointed tubular distal portion and a tubular proximal portion, and a grip portion attached to a proximal side of the injection needle. The proximal portion of the injection needle is given flexibility by forming a helical slit in a distal region of the proximal portion. An outer surface of the proximal portion is coated with resin. A distal end of the distal portion of the injection needle is closed. A plurality of fine holes are formed in an outer surface of the distal portion including the closed part. The grip portion has a liquid-injection port for supplying liquid into the lumen of the injection needle.
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公开(公告)号：US20210402195A1
公开(公告)日：2021-12-30
申请号：US17472645
申请日：2021-09-12
Applicant: Japan Lifeline Co., Ltd.
Inventor： Takuya Sasaki
Abstract: An intracardiac defibrillation catheter has improved operability when a distal end portion of the catheter having a first DC electrode group is inserted into a coronary sinus. The defibrillation catheter includes an insulating tube member having a distal end side tube and a proximal end side tube, a handle connected to a proximal end of the tube member, a first DC electrode group having a plurality of electrodes mounted at the distal end side tube, and a second DC electrode group having a plurality electrodes spaced apart toward a proximal end side from the first DC electrode group and mounted at the distal end side tube. The catheter performs defibrillation in a cardiac cavity by applying voltages having polarities that differ from each other to the first DC electrode group and the second DC electrode group. Bending rigidities of a catheter shaft increases stepwise from the distal end to the proximal end.
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公开(公告)号：US10070920B2
公开(公告)日：2018-09-11
申请号：US15507582
申请日：2015-07-28
Applicant: Japan Lifeline Co., Ltd.
Inventor： Takuya Masuda
CPC classification number: A61B18/1492 , A61B5/01 , A61B5/4233 , A61B5/6855 , A61B8/12 , A61B8/445 , A61B2018/00351 , A61B2018/00488 , A61B2018/00577 , A61B2018/00791 , A61B2018/00797 , A61M25/008 , A61N1/0517
Abstract: Provided is a catheter that is manufacturable in a simplified fashion. The catheter 1 includes: a catheter tube 11 including a tip-flexible part 11A that has an inner tube (first tube 61) and a plurality of divided tube members 620 to 625 that are disposed on outer circumference of the inner tube and independent of each other; one or a plurality of metal rings disposed in the tip-flexible part 11A; one or a plurality of temperature sensors disposed corresponding to the one or the plurality of metal rings; and a handle 12 attached at a base end of the catheter tube 11. A rate of a thickness of the metal ring to an outer diameter of the metal ring is 7.5% or greater. The metal ring and the plurality of divided tube members 621 to 625 are both so disposed in the tip-flexible part 11A as to be fitted on an outer circumferential surface of the inner tube side by side in an axial direction of the catheter tube 11.
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公开(公告)号：US20170296254A1
公开(公告)日：2017-10-19
申请号：US15514161
申请日：2015-09-17
Applicant: Japan Lifeline Co., Ltd.
Inventor： Norihiko Mitsumune , Kenji Mori
Abstract: To provide a chemical ablation device that enables simple performance of chemical ablation treatment including pre- and post-treatment potential measurements. A chemical ablation device according to the present invention includes an electrode-equipped guidewire (30) with which intracardiac potential is measurable, an over-the-wire balloon catheter (40) having a guidewire lumen (415) into which the electrode-equipped guidewire (30) is to be inserted, a Y-shaped connector (50) connected to a proximal side of the balloon catheter (40) and including a guidewire port (51) and an expansion port (53), and a hemostasis valve (60) connected to the guidewire port (51) of the Y-shaped connector (50) and including a side-infusion tube (65) for supplying ethanol to the guidewire lumen (415) of the balloon catheter (40). The ethanol supplied to the guidewire lumen (415) of the balloon catheter (40) is ejected from an opening of a distal tip (47).
