An electrode catheter 1 comprises a shaft 2, a plurality of splines, and a distal member 4. The plurality of splines are connected to the distal end side of the shaft 2. The distal member 4 is connected to the distal end sides of each of the plurality of splines. At least two adjacent splines among the plurality of splines have different radiopacity from one another. At least three splines among the plurality of splines may have different radiopacity from one another.
A61B 18/12 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
This electrode catheter comprises: a base material 30 provided on a tip end side to be inserted into a body; an electrode 18 provided in a planar shape on at least a part of a surface of the base material 30 to apply electricity, supplied through a conductive wire extending from the base end side, to a biological tissue BT; and an insulating film 50 provided partially on a surface of the electrode 18 and exposing the electrode 18 in a regular pattern. In a cross section where the width of the insulating film 50 is minimum, conductive regions AA formed by two exposed portions EP1, EP2 of the electrode 18 on both sides of the insulating film 50 are connected within the biological tissue BT facing the insulating film 50.
This electrode catheter comprises: a rod-form member 12; an electrode 14 fixed to the outer peripheral part of the rod-form member 12; and an electric wire 16 electrically connected to the electrode 14. The electric wire 16 is provided with: a conductive wire 32 having a joining part 30 joined to the electrode 14; and an insulator 34 covering the conductive wire 32. The conductive wire 32 is provided with a reverse surface 36 facing the electrode 14 in a cross-section that passes through the joining part 30 and is orthogonal to the conductive wire axial direction. At least part of the conductive wire 32 other than the reverse surface 36, in the aforementioned cross-section, is covered by the insulator 34.
A61B 5/287 - Holders for multiple electrodes, e.g. electrode catheters for electrophysiological study [EPS]
A61B 5/273 - Connection of cords, cables or leads to electrodes
A61B 18/08 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by means of electrically-heated probes
A catheter 1 comprises: a shaft 2 that is inserted into a body; a plurality of splines 3 that are connected to the distal end side of the shaft 2; and a distal member 4 that is connected to the distal end sides of each of the plurality of splines 3. The outer shape of the distal member 4 is non-circular when viewed from the center axis direction of the shaft 2. A groove that continues from the distal end side to the proximal end side of the distal member 4 may be formed in the outer surface of the distal member 4.
A catheter shaft 20 includes: a main lumen tube 41 forming a main lumen 40; and a first sub-lumen tube 43 forming a first sub-lumen 42. The first sub-lumen tube 43 is provided with a facing surface 43a formed in a planar shape. The main lumen tube 41 is provided with a facing surface 41a formed in a planar shape. The first sub-lumen tube 43 is disposed so that the facing surface 43a is in contact with the facing surface 41a of the main lumen tube 41.
An electrode catheter device according to the present invention comprises a tip end–side shaft 50 that is provided on a tip end side that is to be inserted into a body, a base end–side shaft 60 that is harder than the tip end–side shaft 50 and is connected to the tip end–side shaft 50 on a base end side that is the opposite side from the tip end side, and a plurality of electrodes 31, 32 that are provided to the tip end–side shaft 50 and are electrically connected to the outside of the body via the tip end–side shaft 50 and the base end–side shaft 60. The distance in an axial direction that connects the tip end side and the base end side between a terminal electrode 32e of the plurality of electrodes 31, 32 that is provided furthest to the base end side and the connection 7 between the tip end–side shaft 50 and the base end–side shaft 60 is shorter than four times the length of the terminal electrode 32e.
An atrial septal puncture device 1 is provided with: a long core wire 2 that has a body 10 and a leading end 12 thinner than the body 10; an electrode 4 that is connected to the leading end 12; a coil 6 that covers at least a portion of the leading end 12 and at least a portion of the body 10 in the axial direction of the core wire 2; and an electrically insulative coating 8 that covers at least a portion of the core wire 2 and at least a portion of the coil 6 in the axial direction.
The present invention comprises a rod-shaped member 14 in which a lumen is formed, a core material 20 that is at least partially positioned in the lumen, an electric wire body 22 that is composed of a plurality of electric wires 38 spirally wound around the core material 20, and is at least partially positioned in the lumen, and a plurality of electrodes that are fixed to an outer circumerential section of the rod-shaped member 14 and are electrically connected to the electric wires 38, wherein the core material 20 and the electric wire body 22 are separated in at least a partial range in the axial direction of the rod-shaped member 14. A space can thus be secured between the core material 20 and the electric wire body 22 in the axial direction range in which the core material 20 and the electric wire body 22 are separated.
A power supply device 8 for performing ablation using an irreversible electroporation method includes: a power supply unit 26 that is electrically connected to a catheter 4 having a plurality of electrodes and a counter electrode plate 6 and applies a voltage to the plurality of electrodes and the counter electrode plate 6; and a control unit 28 that controls the power supply unit 26 so as to execute, in combination, a monopolar mode application for applying a voltage between the electrode and the counter electrode plate 6 and a bipolar mode application for applying a voltage between the electrodes.
A61B 18/12 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
A power supply device (14) supplies a pulse voltage to a plurality of electrodes of a catheter (12). The power supply device (14) is provided with: a pulse generation circuit (42) that generates the pulse voltage by switching a DC voltage; and an output switching circuit (44) that is connected between the pulse generation circuit (42) and the plurality of electrodes and switches the electrode to which the pulse voltage is output.
A61B 18/12 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
A method for manufacturing an electrode catheter includes passing an inner tube 22 through an outer tube 20, a ring-shaped electrode 4, and an outer tube 20 in the stated order, and thermally welding the outer tubes 20 and the inner tube 22.
A balloon catheter comprises: a shaft 12 that is to be inserted into a body; a balloon 14 that is provided to the leading end-side part of the shaft 12; a heating member that can heat a liquid to be supplied into the balloon 14; and a heating member conducting wire 20 which is electrically connected to the heating member. Inside the shaft 12, a first lumen 60 into which the heating member conducting wire 20 is inserted and a second lumen 62 that is different from the first lumen 60 are formed. One of the first lumen 60 and the second lumen 62 forms a supply flow path 64 through which the liquid supplied to the balloon 14 flows, and the other of the first lumen 60 and the second lumen 62 forms a discharge flow path 66 through which the fluid discharged from the inside of the balloon 14 flows.
Medical apparatus and instruments, namely, automated external defibrillators (AEDs), endoscopic equipment for medical purposes and endoscopy cameras for medical purposes; catheters; temperature monitors for medical purposes; internal atrial cardioversion system for medical purposes; medical guidewires; needles for medical use; high frequency therapy apparatus; radio frequency therapy apparatus; artificial vascular grafts; synthetic stent grafts; endovascular stent grafts; stents; defibrillators; electrocardiographs; electrophysiology catheters for atrial cardioversion; atrial cardioversion generators; medical devices, namely, sheath introducers; surgical and medical devices and instruments used for the ablation of tissue; medical isolation transformers; cannulas; transseptal needles; radio frequency wires; medical electrical generators for ablation of biological tissue; medical devices for connecting a medical electrical generator for ablation of biological tissue and catheters; cables for medical catheters.
Medical apparatus and instruments, namely, catheters; atrial cardioversion system for medical purposes; electrophysiology catheters for atrial cardioversion; atrial cardioversion generators.
Medical apparatus and instruments, namely, catheters; atrial cardioversion system for medical purposes; electrophysiology catheters for atrial cardioversion; atrial cardioversion generators.
This electrode catheter comprises: a shaft to be inserted into the body; and an electrode assembly 16 provided at the leading end of the shaft. The electrode assembly 16 is provided with a plurality of splines 24a-24f each having at least one electrode 26, and a leading end member connected to the leading end sides of the plurality of splines 24a-24f. The plurality of splines 24a-24f can be deformed into a circular sector shape having arc-shaped regions 28a-28f along a common virtual circle 50 as viewed in the axial direction of the shaft. When the plurality of splines 24a-24f are in the circular sector shape, the plurality of arc-shaped regions 28a-28f formed by the plurality of splines 24a-24f account for a total of at least 80% of the circumference of the virtual circle 50.
Medical apparatus and instruments for use in endovascular and cardiology procedures; radio frequency generators for use in endovascular and cardiology procedures; radio frequency wires for use in endovascular and cardiology procedures; transseptal needles.
This catheter device comprises a catheter shaft 30 that includes an inner layer 50 forming a main lumen 40 having a substantially circular cross-sectional shape, and an outer layer 52 provided outside the inner layer 50 and forming a sub-lumen 42. The sub-lumen 42 has a cross-sectional shape curved along the main lumen 40 and having a substantially uniform thickness t in the circumferential direction.
This catheter is provided with: a shaft that is inserted into a body; and a plurality of sets of splines 3 that are each configured from two splines that are connected to the distal end side of the shaft. The two splines 3 constituting a set of the splines 3 are arranged across at least one spline 3 belonging to another set. The plurality of sets of splines 3 are each constrained by a single restraining member in terms of movement between the same.
This power supply device is provided with: a power supply unit that is electrically connected to a catheter having electrodes and that applies voltage to the electrodes so as to generate biphasic pulses BP; and a control unit that controls the power supply unit to generate, following on a first pulse set P1 in which positive-voltage phase pulses PVP and negative-voltage phase pulses NVP of the biphasic pulses BP spaced apart by a predetermined first interval A1 are continuous, a second pulse set P2 in which positive-voltage phase pulses PVP and negative-voltage phase pulses NVP spaced apart by a second interval A2 that differs from the first interval A1 are continuous.
A61B 18/12 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
A power supply device 8 includes: a power supply unit 26 that is electrically connected to a catheter 4 having a plurality of electrodes and applies a voltage to the plurality of electrodes; and a control unit 28 that controls the power supply unit 26 to continuously apply a voltage to a part of the electrodes a plurality of times, and then continuously apply a voltage to another part of the electrodes a plurality of times.
A61B 18/12 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
A power supply device 8 comprises: a power supply unit 26 which is electrically connected to a catheter 4 having a plurality of splines each provided with one or more electrodes, and which applies a voltage to the electrodes; and a control unit 28 which controls the power supply unit 26 so as to sequentially apply a voltage to each of the electrodes.
A61B 18/12 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
An ablation system 1 includes: a catheter 4 having three or more electrodes; a power supply unit 26 that is electrically connected to the catheter 4 and that applies a voltage to the plurality of electrodes; and a control unit 28 that, upon dividing the plurality of electrodes 18 into a plurality of electrode groups the number of which is smaller than the number of the electrodes 18, controls the power supply unit 26 so as to sequentially apply a voltage to each of the electrode groups.
A61B 18/12 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
A stent graft of the present disclosure includes a graft having a cylindrical shape and an end stent connected to at least an axial end of the graft. The end stent includes a hooking portion hooked on a stent constraining mechanism of a delivery device so as to constrain expansion of the end stent, the hooking portion includes a part protruding from the axial end of the graft to an outer side in an axial direction, and a protrusion length of the part is configured to be shortened by expansion of the axial end of the graft together with the end stent. The variable range of the protrusion length of the hooking portion may include zero.
A catheter shaft includes a shaft main body having a multi-lumen structure, and at least one reinforcement layer embedded in the shaft main body. When, during a tensile test of pulling a test piece obtained from the catheter shaft under test conditions of a 30-mm distance between chucks and a tensile speed of 300 mm/min, a percentage of change amount in a minimum outer diameter of the test piece after pulling to the minimum outer diameter before pulling at a predetermined position of the test piece is defined as a diameter reduction percentage (%), and a percentage of change amount in an axial-direction dimension of the catheter shaft after pulling to the axial-direction dimension before pulling is defined as an elongation percentage (%), the diameter reduction percentage is 5% or greater when the elongation percentage reaches 100% without breakage of the test piece in the tensile test.
To provide a catheter capable of improving convenience. A catheter (electrode catheter 1) according to an embodiment of the present invention includes a catheter shaft 11 extending along an axial direction (Z-axis direction) and having a near-distal end structure 6 including a plurality of electrodes 111, and a handle 12 mounted on a proximal end side of the catheter shaft 11. The handle 12 includes a handle body 121 extending along the axial direction and a slide mechanism 123 configured to be slidable along the axial direction in the handle body 121 and operated during a deformation operation in which the shape of the near-distal end structure 6 is changed between a first shape and a second shape. The first shape is a non-deployed shape in which the near-distal end structure 6 is not deployed along the axial direction, and the second shape is a deployed shape in which the near-distal end structure 6 is deployed from the non-deployed shape along the axial direction.
Medical apparatus and instruments, namely, endoscopic equipment for medical purposes and endoscopy cameras for medical purposes; catheters; temperature monitors for medical purposes; internal atrial cardioversion system, namely, an electromechanical device that includes a pulse generator and catheter, for medical purposes; medical guidewires; needles for medical use; high frequency therapy apparatus; radio frequency therapy apparatus; artificial vascular grafts; synthetic stent grafts; endovascular stent grafts; stents; defibrillators; electrocardiographs; electrophysiology catheters for atrial cardioversion; atrial cardioversion generators; medical devices, namely, sheath introducers; surgical and medical devices and instruments used for the ablation of tissue; medical isolation transformers; cannulas; transseptal needles; radio frequency wires for use in endovascular and cardiology procedures
37.
BRAIDED STRUCTURE, TUBE STRUCTURE, TUBE STRUCTURE FOR CATHETER, METHOD FOR MANUFACTURING BRAIDED STRUCTURE
A catheter includes a shaft, a first wire wound in a spiral shape around an axis of the shaft, and a second wire wound around the shaft in a direction opposite to that of the first wire in a first portion, and wound around the shaft in a direction identical to that of the first wire in a second portion. Accordingly, it is possible to provide a braided structure and the like having flexibility that differs depending on the area in an axial direction.
Medical apparatus and instruments, namely, automated external defibrillators (AEDs), endoscopic equipment for medical purposes and endoscopy cameras for medical purposes; catheters; temperature monitors for medical purposes; internal atrial cardioversion system, namely, an electromechanical device that includes a pulse generator and catheter, for medical purposes; medical guidewires; needles for medical use; high frequency therapy apparatus; radio frequency therapy apparatus; artificial vascular grafts; synthetic stent grafts; endovascular stent grafts; stents; defibrillators; electrocardiographs; electrophysiology catheters for atrial cardioversion; atrial cardioversion generators; medical devices, namely, sheath introducers; surgical and medical devices and instruments used for the ablation of tissue; medical isolation transformers; cannulas; transseptal needles; radio frequency wires for use in endovascular and cardiology procedures
A delivery device includes: an indwelling device including a stent body that is self-expandable; and a delivery catheter configured to separably support the indwelling device. The delivery catheter includes: a cover configured to cover at least a part of an axial range of the stent body; and an expansion restraining mechanism including a plurality of restraining wire rods configured to restrain expansion of the stent body by hooking a stent wire rod that constitutes the stent body. The plurality of restraining wire rods are configured to release restraint of the stent body by moving axially.
A defibrillation control device includes a power source unit that supplies electrical energy to an electrode catheter, an abnormality detection unit that detects an earliest abnormal waveform by using a plurality of electrocardiographic waveforms measured by a plurality of electrodes of the electrode catheter after supplying the electrical energy, and a warning unit that issues an alert upon detecting the earliest abnormal waveform.
A monitoring device includes a waveform acquisition unit that acquires an electrocardiographic waveform, a waveform providing unit that provides the electrocardiographic waveform to a defibrillation control device that supplies electrical energy to an electrode catheter, a reception unit that receives a trigger signal indicating a possible supply start timing of the electrical energy from the defibrillation control device, and a synchronization determination unit that determines whether the trigger signal is synchronized with the electrocardiographic waveform.
An electrode catheter includes a catheter shaft and an electrode assembly and a distal-side bundling component disposed at least partially distal to the catheter shaft. The electrode assembly includes a plurality of spline portions each having a proximal end portion bundled by the catheter shaft and a distal end portion bundled by the distal-side bundling component. The plurality of spline portions includes, when viewed from a distal side in an axial direction of the catheter shaft, a counterclockwise spline portion extending counterclockwise from a side of the distal end portion toward a side of the proximal end portion and a clockwise spline portion extending clockwise from the side of the distal end portion side toward the side of the proximal end portion.
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.
A balloon catheter includes a shaft that extends in an axial direction from a proximal end side to a distal end side, a balloon that is attached to the distal end side of the shaft and is expandable by a fluid supplied from the proximal end side of the shaft, a distal end portion expansion lumen that is provided inside the shaft to supply the fluid to a distal end portion in the balloon, and a proximal end portion expansion lumen that is provided inside the shaft to supply the fluid to a proximal end portion in the balloon. The balloon expands, by the fluid simultaneously supplied from the distal end portion expansion lumen and the proximal end portion expansion lumen, into an hourglass shape having a narrow portion in an intermediate portion between the distal end portion and the proximal end portion.
A catheter inserter for inserting a balloon catheter into an insertion opening of an endoscope provided with a valve. The balloon catheter includes a balloon attached on a distal end side of a shaft and configured to be expanded by an expansion fluid supplied from a proximal end side of the shaft, and an elastic band wound around an outer periphery of an intermediate portion of the balloon and configured to limit expansion of the balloon at the intermediate portion. The catheter inserter includes, on a distal end side thereof, a restrained member support structure configured to support a portion of an outer periphery of the elastic band. A proximal end support portion supporting a proximal end portion of the elastic band from a proximal end side is provided at a proximal end portion of the restrained member support structure.
A61B 1/018 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor characterised by internal passages or accessories therefor for receiving instruments
A61B 1/00 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor
46.
ELECTRODE CATHETER AND METHOD OF MANUFACTURING CATHETER SHAFT
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.
An electrical catheter device includes a catheter including a first electrode, a second electrode, a first conductor connected to the first electrode and extending toward a proximal end of a defibrillation catheter, a second conductor connected to the second electrode and extending toward the proximal end, and a connector that integrally accommodates a proximal end portion of the first conductor and a proximal end portion of the second conductor; and a voltage applying device that is connected to the connector and applies different voltages to the proximal end portion of the first conductor and the proximal end portion of the second conductor. In the connector, a creepage distance longer than a spatial distance is provided between the proximal end portion of the first conductor and the proximal end portion of the second conductor. [Selected Drawing] FIG. 3
A catheter includes an elongated body, a distal end side of which is inserted into a body, and an electrode provided around an axis of the elongated body and expandable in a direction intersecting the axis. The electrode in an expanded state includes an intermediate portion at least partially including a portion in which element wires spread like a mesh, a proximal end portion located closer to a proximal end side of the elongated body than the intermediate portion and in which the element wires gather, and a distal end portion located closer to the distal end side than the intermediate portion and in which the element wires gather. The intermediate portion includes a maximum portion where an outer dimension of the electrode is maximized. The maximum portion is located closer to the proximal end side than a center of the electrode in an axial direction of the elongated body.
An intracorporeal member includes an elongate body having a distal end side, and electrodes disposed on the distal end side of the elongate body. At least the distal end side is to be inserted into a body. The electrode includes a first layer and a second layer arranged in a thickness direction of the electrode. At least a part of the second layer is located at a position farther away from the elongate body than the first layer. The first layer contains silver, gold, and carbon as main components, and contains carbon in a largest amount among silver, gold, and carbon. The second layer contains gold as a main component.
A power supply device according to an embodiment of the disclosure includes a power source unit configured to supply power for performing ablation using irreversible electroporation to a plurality of electrodes in an ablation catheter, and a control unit configured to control pulse voltages such that when the ablation is performed by supplying the power, the pulse voltages with a plurality of types of positive amplitude values are applied to three or more application electrodes including the plurality of electrodes.
A61B 18/12 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
An electrode catheter includes a catheter shaft, a connector connected to a proximal end side of the catheter shaft, at least one electrode mounted on a distal end side of the catheter shaft, and a lead wire connected to an inner peripheral surface of the at least one electrode at a distal end, extending through an interior of the catheter shaft, and connected to the connector at a proximal end. A ratio of an outer diameter of the lead wire to an outer diameter of the catheter shaft is from 0.12 to 0.35.
A catheter according to an aspect of the present disclosure includes a shaft, an inflatable balloon attached to a distal end side of the shaft, and a covering member configured to cover an outer periphery of the balloon and to be elastically deformable in conformity with deflation of the balloon. When the balloon is inflated and then deflated, the covering member is deflated to a state before inflation by elastic deformation, in conformity with the deflation of the balloon. Thus, the maximum diameter of the balloon in the deflated state can be reduced.
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.
NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY (Japan)
Inventor
Kodama, Yuki
Kuwatani, Masaki
Hirata, Hajime
Ogawa, Mikako
Nakajima, Kohei
Abstract
A light irradiation device includes a tube including a tube main body and a light emitting portion, a plurality of wiring boards disposed inside the light emitting portion and including a plurality of light emitting elements disposed at an equal interval mounted, an anode lead wire for connecting an anode terminal of each of the wiring boards to a power source, and a cathode lead wire for connecting a cathode terminal of each of the wiring boards to the power source. In the light emitting portion, a central lumen and surrounding lumens that are arrayed at a 90° interval around the central lumen are formed. The wiring boards are disposed in the respective surrounding lumens with the light emitting elements arrayed along a longitudinal direction of the light emitting portion.
An endoscope of the disclosure includes: a shaft made of resin and including a distal end flexible portion, the shaft including a camera channel, water channels, and a forceps channel formed therein; a handle mounted on a proximal end side of the shaft; and a camera including a camera head and a cable tube, the camera head being equipped with an imaging element, the camera being disposed removably from the shaft and the handle when inserted into the camera channel and the handle. The shaft has an outer diameter (D) of from 2.8 mm to 4.1 mm, the camera channel has a diameter (d1) of from 0.75 mm to 1.2 mm, and (D−d1) is from 1.95 mm to 3.25 mm.
A61B 1/012 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor characterised by internal passages or accessories therefor
A61B 1/00 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor
A61B 1/04 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor combined with photographic or television appliances
An object is to provide a stent having, in a well-balanced manner, a high expansion force that enables the stent to come into close contact with an inner wall of a tubular organ, such as a digestive tract, to sufficiently expand a constricted part and good flexibility by which none of an ulcer and a perforation is generated at sites with which both end parts of the stent come into contact even when the stent is placed in a bent tubular organ. A stent of the disclosure is a stent formed in a tubular shape by braiding one or more wire rods. A radial force (RF) ranges from 0.02 N/mm to 0.04 N/mm, and a ratio (RF/AF) of the radial force (RF) to an axial force (AF) is 0.14 mm−1 or more. The stent of the disclosure preferably has a shortening of 35% or less.
A61F 2/90 - Stents in a form characterised by wire-like elementsStents in a form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
An object is to provide an endoscope in which opening and closing operations of a flow path of a suction tube can be easily performed while a handle is being held and operated. An endoscope of the disclosure includes a shaft including a forceps channel and water channels, a handle including a forceps port, a water port, and a suction port, a suction tube being inserted inside the handle from the suction port, extending inside the handle, and having a distal end portion joining a communication path between the forceps channel and the forceps port, and a water tube being inserted inside the handle from the water port, extending inside the handle, and having a lumen communicating with the water channels. The handle includes a valve mechanism that opens and closes a suction flow path of the suction tube.
A61B 1/00 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor
A61B 1/018 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor characterised by internal passages or accessories therefor for receiving instruments
A61B 1/015 - Control of fluid supply or evacuation
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.
A61B 1/018 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor characterised by internal passages or accessories therefor for receiving instruments
A guiding catheter includes: a shaft that includes a main lumen and a sub-lumen; a balloon attached to a distal end portion of the shaft; a distal end tip connected to a distal end side of the shaft; and a hub connected to a proximal end side of the shaft. The shaft is formed by layering: an inner layer that forms the main lumen; a first reinforcing layer formed on the inner layer; an intermediate layer formed on the first reinforcing layer and enclosing the sub-lumen; a second reinforcing layer formed on the intermediate layer; and an outer layer formed on the second reinforcing layer from a proximal end to a distal end.
An electrode catheter includes a catheter shaft, an irrigation member, and a distal-end electrode. A female thread is formed on the distal-end electrode. The irrigation member includes a first component having an annular shape, and a second component having an eccentric flow path formed inside a proximal-end part thereof and a male thread formed at a distal-end part thereof, the male thread being screwed to the female thread of the distal-end electrode. With the first component and the distal-end electrode fitted to each other, the first component and the second component fitted to each other, the distal-end portion of the second component inserted into the distal-end electrode, and the female thread and the male thread screwed to each other, the distal-end electrode and the irrigation member are connected to each other while forming, inside the first component, a storage space for a liquid.
[Problem]
[Problem]
Provided is a power supply device and the like capable of improving convenience.
[Problem]
Provided is a power supply device and the like capable of improving convenience.
[Solution]
[Problem]
Provided is a power supply device and the like capable of improving convenience.
[Solution]
A power supply device according to an embodiment of the present disclosure includes: a power supply unit that supplies power to an electromedical device including a plurality of electrodes; and a control unit that controls the power supply unit such that the power is supplied to a part of the plurality of electrodes.
A61B 18/12 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
A stent formed by weaving a wire into a tubular shape includes intersecting portions at which the wire intersects and interlocking portions at which the wire interlocks. In the stent, at least two stretch assisting columns are continuously disposed in a circumferential direction of the stent, each of the at least two stretch assisting columns including a larger number of the intersecting portions than the interlocking portions in an axial direction of the stent, and at least one contraction assisting column including a larger number of the interlocking portions than the intersecting portions in the axial direction is disposed. When the stent is equally divided in the circumferential direction by a plane including an axis of the stent and a first equally-divided region includes the at least two stretch assisting columns continuously disposed, a second equally-divided region includes a majority of the interlocking portions.
A61F 2/90 - Stents in a form characterised by wire-like elementsStents in a form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
Provided is a catheter in which a spline changes its shape into an intended shape. A catheter includes a shaft to be inserted into the body, a plurality of splines connected to the distal end side of the shaft, and a distal end member connected to the distal end side of the splines. The plurality of splines include a first spline and a second spline. The first spline and the second spline are located adjacent to each other and their motions are restrained by a first restraining member.
[Object]
[Object]
Provided is a catheter that can enhance the smoothness of a lumen.
[Object]
Provided is a catheter that can enhance the smoothness of a lumen.
Solution
[Object]
Provided is a catheter that can enhance the smoothness of a lumen.
Solution
A balloon catheter includes: an outer shaft to be inserted into a body, the outer shaft including a main lumen that extends in an axial direction from a proximal end side toward a distal end side; and a second member exposed in a portion of an inner circumferential surface of the outer shaft to the main lumen and having frictional properties lower than those of a first member (an inner shaft) that forms the inner circumferential surface of the outer shaft. The balloon catheter further includes sub-shafts that include sub-lumens extending in the axial direction and that are formed of the second member, and a portion of outer circumferential surfaces of the sub-shafts is exposed in a portion of the inner circumferential surface of the outer shaft to the main lumen.
A catheter (100) that comprises: a shaft (106); a first wire (116) spirally wound around the axis of the shaft (106); and a second wire (118) which is wound around the shaft (106) in the opposite direction of the first wire (116) at a first site (112) and wound around the shaft (106) in the same direction as the first wire (116) at a second site (114). Thus, a braided structure, etc. having different flexibility depending on the site in the axial direction can be provided.
A balloon-type electrode catheter includes a catheter shaft, a balloon provided at a part including a distal end of the catheter shaft and being inflatable with a fluid, and an electrode. The balloon includes a through hole discharging a fluid in the balloon to an outside of the balloon, a distal end large diameter portion, a proximal end large diameter portion, a small diameter portion positioned between the two large diameter portions and being smaller in diameter than the two large diameter portions, a distal end inclined portion connecting the distal end large diameter portion and the small diameter portion, and a proximal end inclined portion connecting the proximal end large diameter portion and the small diameter portion. The electrode is exposed at at least the small diameter portion. The through hole is disposed in at least one of the distal end inclined portion or the proximal end inclined portion.
A balloon-type electrode catheter includes a catheter shaft including an outer shaft and an inner shaft, a balloon provided at a part including a distal end of the catheter shaft, and an electrode. The balloon includes an outer joining portion an inner joining portion, a distal end large diameter portion, a proximal end large diameter portion, a small diameter portion positioned between the two large diameter portions and being smaller in diameter than the two large diameter portions, a distal end inclined portion connecting the distal end large diameter portion and the small diameter portion, and a proximal end inclined portion connecting the proximal end large diameter portion and the small diameter portion. The electrode is exposed at at least the small diameter portion.
An electromedical device control system includes a power supply device that supplies electric power to an electromedical device; and one or more relay devices that relay between the electromedical device and the power supply device. A type of the electromedical device connected to the relay device is obtained by determination using at least the relay device. The power supply device outputs the electric power in an output mode corresponding to the type of the electromedical device.
The balloon catheter includes a shaft to be inserted into a body, a balloon that is attached to a distal end side of the shaft and expandable by a fluid supplied from a proximal end side of the shaft, and an electrode pair that is formed on a surface of the balloon along an axial direction from the proximal end side toward the distal end side. Widths in a circumferential direction of respective band-shaped electrodes are greater than a width of an electrode clearance that separates the respective band-shaped electrodes in the circumferential direction in the electrode pair. A plurality of the electrode pairs are formed on the surface of the balloon. A width of an electrode pair clearance that separates the respective electrode pairs, in the circumferential direction is greater than the width of the electrode clearance.
Object
Provided is an electromedical device control system and the like capable of improving the accuracy of determining a blocked state of a flow path.
Solving means
An electromedical device control system according to an embodiment of the present disclosure includes a determination unit that performs predetermined determination based on a pressure value of a fluid supplied to a flow path of an electromedical device, a pressure threshold set according to a setting value of a flow rate of the fluid, and an amount of change over time in the pressure value. The determination unit determines whether the amount of change over time in the pressure value is a positive value when determining that the pressure value is equal to or greater than the pressure threshold.
G05D 7/06 - Control of flow characterised by the use of electric means
G01F 1/34 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
G01F 25/10 - Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
A cholangioscope includes a catheter that is to be inserted into a body and has a curved shape, a camera shaft that can be inserted into the catheter and is formed in a curved shape, and a CMOS image sensor that is provided at a distal end portion of the camera shaft. The catheter further includes a forceps channel into which a medical instrument can be inserted, and a camera channel that is provided in an outer side portion of the catheter having the curved shape outer than the forceps channel and into which the camera shaft can be inserted. Curvature of the camera shaft is less than curvature of the catheter. The camera shaft is formed into a curved shape by using a shape memory alloy.
A61B 1/012 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor characterised by internal passages or accessories therefor
An intracardiac defibrillation catheter system includes a defibrillation catheter, a power supply device, and an electrocardiograph, in which an arithmetic processing unit of the power supply device sequentially senses an event estimated to be an R wave from an electrocardiogram input from the electrocardiograph, calculates a heart rate each time sensing is performed, and, when, after an event (Vn) is sensed and after an application execution switch is input, an event (Vn+m) is sensed, performs arithmetic processing so that a DC voltage is applied in synchronization with the event (Vn+m) only in a case where the event (Vn+m) is sensed after a lapse of a refractory period whose length corresponds to 50% of a reciprocal of a heart rate (An) at a sensing time point of the event (Vn), to control a DC power supply unit. The defibrillation catheter system can reliably avoid performing defibrillation in synchronization with a T wave without being affected by the level of the heart rate of a patient.
Object
Provided is a power supply device and the like capable of improving convenience.
Solving means
A power supply device according to an embodiment of the present disclosure include a power supply unit that supplies power to an electromedical device, a first impedance control unit disposed on a path of a circulation path of the power between the power supply unit and the electromedical device, excluding an input path for inputting an electrical signal obtained in the electromedical device to another device, and a second impedance control unit disposed on the input path of a path between the power supply unit and the other device. An impedance state of each of the first and second impedance control units transitions in accordance with a supply state of the power to the electromedical device.
A balloon catheter includes a shaft inserted into a body; a balloon attached to the shaft on a distal end side and is expandable by an expansion fluid supplied from a side of a proximal end of the shaft; an elastic band wound around an outer periphery of an intermediate portion between a distal end portion and a proximal end portion of the balloon , and is configured to limit expansion of the balloon at the intermediate portion; and a covering member covering an outer periphery of the elastic band. The balloon is expandable to a maximum expansion diameter from a folded state, in accordance with pressure of the expansion fluid, the elastic band is expandable beyond the secured diameter, by being elastically deformed by the balloon expanding, and the covering member is expandable by being elastically deformed by the balloon or the elastic band expanding.
A drug solution injection needle includes: a distal end member being a sharp member and made of metal; a connecting tube having electrical insulating properties connected to a base end side of the distal end member; a metal tube connected to a base end side of the connecting tube; and an insulating layer covering an outer circumferential surface of a base end portion of the metal tube. The connecting tube and/or the distal end member includes at least one hole communicating with a cavity of the drug solution injection needle and open to an outer surface of the connecting tube or the distal end member, and an electrode configured to measure electric potential is formed by a distal end portion of the metal tube not covered by the insulating layer.
An object is to provide an endoscope by which it is possible to reuse a camera including an expensive solid-state image sensor. An endoscope of the present invention includes a shaft to be inserted into a body, a handle mounted on a proximal end side of the shaft and including a grip and operation knobs, and a camera including a cable tube and a camera head equipped with an image sensor. The camera is separable from the handle and the shaft. The shaft is formed with a camera channel in which the camera is arranged, the handle is provided with a camera channel port communicating with the camera channel, and the cable tube of the camera is attached to a camera connector mounted to the camera channel port when the camera is arranged in the camera channel.
A61B 1/05 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor combined with photographic or television appliances characterised by the image sensor, e.g. camera, being in the distal end portion
A61B 1/018 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor characterised by internal passages or accessories therefor for receiving instruments
The purpose of the present invention is to provide a catheter system that is able to quickly and accurately detect a disconnection of a lead wire of an electrode that constitutes a defibrillation catheter. This catheter system comprises a defibrillation catheter (100) and a power source device (700), wherein: the defibrillation catheter comprises a first DC electrode group (31G) made up of a plurality of first electrodes (31) and a second DC electrode group (32G) made up of a plurality of second electrodes (32); the power source device comprises a DC power supply unit (71) and a computation processing unit (75); the computation processing unit comprises an output circuit (751) for direct current voltage and an IMP measuring circuit (752) for measuring the IMP between electrode groups or the IMP between electrodes; and the computation processing unit controls the IMP measuring circuit so as to perform, on all of the first electrodes and the second electrodes, the IMP measuring between one first electrode and one second electrode before defibrillation is performed.
The purpose of the present invention is to provide an electrode catheter capable of preventing an abnormal temperature rise around the connecting portion between a catheter shaft and a tip electrode and capable of uniformly irrigating the entire surface of the tip electrode. An electrode catheter (100) according to the present invention comprises a catheter shaft (10) having lumens (11L, 12L) serving as liquid flow paths, and a tip electrode (30) made of a porous material and connected to the distal end side of the catheter shaft, wherein the catheter shaft has a distal reduced-diameter portion (101) reducing in diameter in the distal end direction, the tip electrode is a hollow structure that has a proximal portion (32) enlarging in diameter from the distal end of the distal reduced-diameter portion in the distal end direction and a distal portion (31) reducing in diameter in the distal end direction and that has an internal space (36) communicating with the lumens of the catheter shaft, and the wall thickness of the tip electrode surrounding this internal space is substantially uniform throughout the proximal portion and the distal portion.
A balloon-type electrode catheter according to the present invention includes an outer tube, an energizing connector, a balloon including neck portions on both ends of an expansion portion, an inner tube, a distal end tip, strip electrodes formed on an outer surface of the balloon, a metal ring attached to the distal end side neck portion with a distal end portion of each of the strip electrodes secured to an outer circumferential surface of the metal ring, and a lead wire electrically connecting each of the strip electrodes and the energizing connector with a distal end of the lead wire fixed to an inner circumferential surface of the metal ring and with a proximal end of the lead wire fixed to the energizing connector.
A therapeutic device according to one embodiment of the present invention comprises: a catheter having a shaft that extends in the axial direction; a stent graft that is configured by including a cylindrical graft and a stent; and first and second covers that are for holding the stent graft in a reduced-diameter state in a leading-end region of the shaft and that are disposed so as to be separated from each other along the axial direction. The first cover is disposed on a base-end side of the second cover along the axial direction. The second cover has: a cylindrical outer layer portion situated on the outer circumferential side of the shaft; an inner layer portion that is disposed on the inner circumferential side of the shaft and the outer layer portion and that extends up to the base-end side of the catheter through the interior of the shaft; and a fold-back portion that connects the outer layer portion and the inner layer portion on the leading-end side of the shaft. The stent graft is so configured as to be held in a reduced-diameter state between the first cover and the shaft and between the shaft and the outer layer portion of the second cover.
A61F 2/962 - Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve
A61F 2/966 - Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
The treatment apparatus according to one embodiment of the present invention comprises: a catheter having a shaft extending along the axial direction; a stent graft configured to include a stent and an additional structure part, the stent graft having a first region and a second region, wherein the first region includes only the stent disposed therein along the axial direction, and the second region includes at least the additional structure part disposed therein; and a cover for keeping the stent in the first region in a diameter-contracted state in a direction in which, in the tip end region of the shaft, the first region is positioned on the tip end side of the shaft, and the second region is positioned on the base end side of the shaft. The cover has: a cylindrical outer layer part that is positioned on the outer peripheral side of the shaft; an inner layer part that is positioned on the inner peripheral side of the shaft and extends through the inside of the shaft to the base end side of the catheter; and a turn-back part that connects the outer layer part and the inner layer part on the tip end side of the shaft. The stent is kept between the outer layer part and the shaft in the diameter-contracted state.
A61F 2/962 - Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve
A61F 2/966 - Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
A catheter according to one embodiment of the present invention comprises a catheter shaft which extends along the axial direction and is provided with a near-tip structure including a plurality of electrodes, and a handle mounted on the proximal end side of the catheter shaft. The handle comprises a handle body extending along the aforesaid axial direction and an operation mechanism which is configured to freely rotate with respect to the handle body around a rotation axis along the axial direction and which is operated so as to rotate when the near-tip structure is rotated around the rotation axis while fixing the length in the axial direction in the near-tip structure.
The purpose of the present invention is to provide a balloon-type electrode catheter that does not ablate a vascular site or tissue surrounding the same in contact with a cone portion of a dilated section of the balloon. The balloon-type electrode catheter according to the present invention comprises an outer tube (10), a current-carrying connector (21), a balloon (30) having neck sections (33), (35) at both ends of a dilated section (31), an inner tube (41), a distal-end tip (46), strip electrodes (51)-(54) formed on the outer surface of the balloon (30), a metal ring (60) mounted on the distal-end-side neck section (31), and a lead wire (70). The distal-end portions of each of the strip electrodes (51)-(54) formed on the outer surface of the distal-end-side neck section (33) and a distal-end-side cone portion (313) are insulated and covered by a resin layer (65). FIG. 3A
The purpose of the present invention is to provide a catheter having a deflectable tip which has excellent torque transfer without the occurrence of whipping even when the catheter shaft is deformed, and which also has excellent planarity of the deformed shape at the tip portion of the shaft. This catheter having a deflectable tip comprises: a catheter shaft (10) having a tip flexible portion; a leaf spring (20) having a rectangular cross section disposed inside the tip flexible portion along the central axis of the catheter shaft; and operational wires (51, 52) that, in order to bend the tip flexible portion, are eccentric from the central axis of the catheter shaft, extend inside the catheter shaft, and are capable of a pulling operation for pulling the rear end of the catheter shaft. If the outer diameter of the catheter shaft is defined as D, the width of the leaf spring as W, and the thickness of the leaf spring as t, the value of (W/D) is 0.20-0.65, and the value of D/(W・t) is 20-45.
The present invention provides a catheter including a novel strain relief that prevents or suppresses kinks of a catheter body. An electrode catheter 100 including a hollow tube-shaped strain relief 200 that includes a hollow part 210 penetrating through in an axial direction, and a catheter body 10 having a base end part 10a inserted into the hollow part is provided, in which the strain relief has an outer-diameter gradually-decreasing part 230 toward a tip end, and the gradual decrease rate of the outer diameter in the outer-diameter gradually-decreasing part increases toward the tip end. The strain relief 200 includes at least two gradient change parts 241 and 242 where the gradual decrease rate of the outer diameter changes. In the strain relief 200, the inner diameter of the hollow part 210 gradually decreases from the base end to the tip end.
A noise determination device according to one embodiment of the present invention comprises: a measurement unit for measuring radiated emission noise which propagates on an alternating-current power line electrically connected to another device different from this noise determination device and is included in a cardiac potential waveform; and a detection circuit for performing predetermined processing on the basis of the radiated emission noise measured by the measurement unit. The measurement unit measures the radiated emission noise on the detection circuit. The detection circuit has: a determination unit for performing a noise determination as to whether or not the noise level of the radiated emission noise measured by the measurement unit is a threshold value or greater; a notification unit for notifying the outside of the result of the noise determination by the determination unit; and a power circuit for supplying electrical power for operation to each of the determination unit and the notification unit on the basis of electric power supply from the other device via the alternating-current power line. The grounding line electrically connected to the grounding terminal of the other device and the ground of the detection circuit are not connected with each other.
The present invention improves blood vessel followability of a cylindrical guide part disposed on the distal-end side of a guide extension catheter. A guide extension catheter 1 comprises, on the distal-end side thereof in the longitudinal direction, a cylindrical guide part 110 having a bore 111 penetrating through in the longitudinal direction. The cylindrical guide part comprises a reinforcing part 117 in an intermediate section thereof in the longitudinal direction, the reinforcing part 117 having an inner layer 131 that defines an inner surface 111a of the bore, an intermediate layer 140 disposed on an outer peripheral surface of the inner layer, and an outer layer 133 disposed on an outer peripheral surface of the intermediate layer. The intermediate layer is configured so as to include a reinforcing body 141 comprising a cylindrical coil body 141A in which a wire rod 143 is helically wound or a cylindrical braided body 141B in which a plurality of wire rods are braided so as to intersect, and a resin 147 that penetrates into an inter-wire-rod space 145 formed between the wire rods constituting the reinforcing body and is softer than a resin that constitutes the outer layer.
A61M 25/088 - Introducing, guiding, advancing, emplacing or holding catheters using an additional catheter, e.g. to reach relatively inaccessible places
A catheter device is to be applied to a catheter and includes a tube member and a handle. The tube member is configured to be inserted through a lumen provided in a catheter shaft of the catheter. The handle is provided on a base end of the tube member, and includes a deformation operating member configured to receive an operation that causes a region in the vicinity of a tip end of the tube member to be subjected to bending deformation. Upon the bending deformation of the region in the vicinity of the tip end of the tube member in response to the operation of the deformation operating member, the tube member to be subjected to the bending deformation is configured to be pressed against a wall surface of the lumen of the catheter shaft to displace a region in the vicinity of a tip end of the catheter shaft.
A catheter device is to be applied to a catheter and includes a tube member and a second handle. The tube member is configured to be inserted through a lumen provided in a catheter shaft of the catheter. The second handle is provided on a base end of the tube member, and includes a deformation operating member. The second handle is provided separately from a first handle provided on a base end of the catheter shaft. Upon bending deformation of a region in the vicinity of a tip end of the tube member in response to an operation of the deformation operating member, the tube member is configured to be pressed against a wall surface of the lumen of the catheter shaft to displace a region in the vicinity of a tip end of the catheter shaft. The second handle is configured to be integrated with the first handle.
The purpose the present invention is to provide a stent having a good balance between high expansion ability to adhere to the inner wall of a tubular organ such as a digestive tract and sufficiently expand a narrowed portion and good flexibility that enables the stent to be retained in a curved tubular organ without causing an ulcer or perforation at sites in contact with the both ends thereof. A stent according to the present invention is formed in a cylindrical shape by braiding one or more wire materials, and has a radial force (RF) of 0.02-0.04 N/mm and a ratio (RF/AF) of the radial force (RF) to the axial force (AF) of 0.14 mm-1. This stent shortens by preferably 35% or less.
The purpose of the present invention is to provide an electrode catheter provided with an irrigation mechanism capable of efficiently cooling the proximal side of a distal electrode while preventing the distal electrode from falling off from an irrigation member. An electrode catheter according to the present invention is provided with: a catheter shaft 10; an irrigation member 20 having an irrigation opening 25 provided therein; and a distal electrode 30 having a hollow structure. A female screw 329 is formed on the inner circumferential surface of the distal electrode. The irrigation member is provided with an annular first part 21 in which an opening edge of the irrigation opening is formed; and a second part 22 in which an eccentric path is formed within a proximal end portion and a male screw 229 which is screwed with the female screw of the distal electrode is formed on the distal end portion. The first part and the distal electrode are fitted with each other, the first part and the second part are fitted with each other, and the distal end portion of the second part is inserted into the distal electrode while the female screw is screwed with the male screw. Accordingly, the distal electrode and the irrigation member are connected with each other while a liquid storage space 24 without a separation wall in the circumferential direction of the irrigation member is formed within the first part.
The purpose of the present invention is to provide a drug solution injection needle equipped with a leading end part that prevents bodily fluid or the like from infiltrating a junction plane between an insulating part and a conductive part of an electrode or the like. A drug solution injection needle (100) according to the present invention comprises a sharp leading end part (10) and a metal tube (50). The leading end part comprises a circular tube section (11), a leading-end sharp section (13), and a small-diameter circular tube section (15). The circular tube section and the leading-end sharp section each have side holes (17) formed therein. The leading end part is formed by integrally molding a conductive portion made of a conductive material and an insulating portion made of an insulating material. As the conductive portion, a first electrode (31) is formed in the leading-end sharp section. A second electrode (32) is formed in the outer circumference of the circular tube section. The small-diameter circular tube section has formed at the outer circumference thereof a first electrode land (35) and a second electrode land (36). A first lead (33) that electrically connects the first electrode and the first electrode land and a second lead (34) that electrically connects the second electrode and the second electrode land are formed and embedded in the tubular wall of the leading end part.
A61M 5/32 - NeedlesDetails of needles pertaining to their connection with syringe or hubAccessories for bringing the needle into, or holding the needle on, the bodyDevices for protection of needles
A purpose of the present invention is to provide an electrode catheter comprising an irrigation mechanism that can efficiently cool the proximal side of a tip electrode, with the tip electrode being prevented from falling from an irrigation member. The electrode catheter according to the present invention comprises a catheter shaft (10), an irrigation member (20), and a hollow-structured tip electrode (30). A female screw (329) is formed on an inner peripheral surface of the tip electrode. The irrigation member includes an annular first part (21) and a second part (22) that has an eccentric channel inside the proximal section and a male screw (229) to be screw-engaged with the female screw of the tip electrode in the distal section. When the first part is fit with the tip electrode and the first part is fit with the second part, the distal section of the second part is inserted into the inside of the tip electrode to allow screw-engagement of the female screw with the male screw. This connects the tip electrode with the irrigation member to form a liquid injection port (25) at the connected position of the tip electrode with the irrigation member, while forming, inside the first part, a liquid storage space (24) that does not have a barrier in the circumferential direction of the irrigation member.
The present invention aims to provide a catheter system that can obtain electrocardiographic information from a first electrode group and second electrode group in a defibrillation catheter, up to until immediately prior to a DC voltage being applied to these electrode groups. This catheter system comprises: the defibrillation catheter (100), a power supply device (700), and an electrocardiograph (800). The power supply device comprises a DC power supply unit (71), a calculation unit (75), a catheter connector (72), an electrocardiograph connector (73), a first ON/OFF switch (761), and a second ON/OFF switch (762). When electrocardiographic potential is measured using electrodes that constitute the first electrode group and/or the second electrode group in the defibrillation catheter, the first ON/OFF switch turns ON. When defibrillating using the defibrillation catheter, the second ON/OFF switch turns ON.
The purpose of the present invention is to provide an endoscope that facilitates an operation for opening and closing a flow channel of a suction tube while holding and operating a handle. This endoscope comprises: a shaft (10) having a forceps channel (17) and a water supply channel (141, 142) formed therein; a handle (20) having a forceps port (27), a water supply port (24), and a suction port (26) formed therein; a suction tube (265) that is inserted through the suction port to the inside of the handle, extending through the inside of the handle, and that has a distal end that joins a communication channel between the forceps channel and the forceps port; and a water supply tube (245) that is inserted through the water supply port to the inside of the handle, extending through the inside of the handle, and that has a lumen in communication with the water supply channel. The handle is provided with a valve mechanism (80) for opening and closing a suction path of the suction tube.
This electrode catheter is characterized by comprising a catheter shaft, a connector connected to the base end side of the catheter shaft, at least one electrode mounted to the tip side of the catheter shaft, and a lead wire that has the tip thereof connected to the inner peripheral surface of the electrode, passes through the interior of the catheter shaft, and has the base end thereof connected to the connector. The electrode catheter is also characterized in that the ratio of the outer diameter of the lead wire with respect to the outer diameter of the catheter shaft is 0.12-0.35.
The purpose of the present invention is to provide a balloon-type electrode catheter that is capable of uniformly cooling the interior of the balloon in the circumferential direction thereof. An electrode catheter (100) according to the present invention comprises an outer tube (10), an electrical connector (21), a balloon (30), an inner shaft (41, 46), surface electrodes (51 to 54) formed on an outer surface of the balloon, and a conducting wire (70) for the surface electrodes. Fluid supply sub-lumens and fluid discharge sub-lumens are formed in the outer tube, the fluid supply sub-lumens are open at the distal-end surface of the outer tube, the fluid discharge sub-lumens are open at the outer circumferential surface of the outer tube in the vicinity of the proximal end of an expansion section of the balloon, and when the outer tube is divided into two parts by an arbitrary imaginary plane, the area ratio of the fluid supply sub-lumens and the fluid discharge sub-lumens in a lateral cross-sectional view of the divided parts is always in the range of 40:60 to 60:40.
A61B 18/12 - Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
The purpose of the present invention is to provide a small diameter electrode catheter provided with the flexural strength and electric properties which are required for an electrode catheter. This electrode catheter comprising: a catheter shaft (10); a connector (20); a coil spring (30); ring electrodes (41)-(45); a distal-end electrode (50); lead wires (61)-(65) of the ring electrodes; and a core wire (70) that has a distal end connected to the distal-end electrode, passes through the coil spring and the catheter shaft, and has a proximal end connected to the connector (20). The core wire is obtained by forming a resin coating on a conductive wire constituted by a metal having a conductivity of at least 1x107S/m and a tensile strength of at least 500 N/mm2. The outer diameter (D) of the catheter shaft is 0.30 to 0.41 mm, and a ratio (d1/D) of the outer diameter (d1) of the core wire with respect to the outer diameter of the catheter shaft is 0.15 to 0.35.
This endoscope system is provided with an endoscope and a controller. The endoscope is provided with: a sheath comprising a shaft inserted into the body and a handle mounted on the base end of the shaft; and a camera comprising a cable tube insertable into the shaft and a camera head disposed in the cable tube and configured to include an imaging element. The endoscope is configured such that the camera is separable from the sheath. The controller is provided with: a display unit which displays an endoscopic video outputted from the camera; a reading unit which reads out information about the number of times of sheath usage involving holding inside the sheath and information about the number of times of camera usage involving holding inside the camera; a determination unit which, on the basis of the information about the number of times of sheath usage and the number of times of camera usage read by the reading unit, determines the effectiveness of sheath and camera usage; and a control unit which, depending on the determination result by the determination unit, performs control for limiting display of the endoscopic video on the display unit.
A61B 1/00 - Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopesIlluminating arrangements therefor
A power supply device according to an embodiment of the present invention is provided with: a power supply unit for supplying electric power for performing ablation by irreversible electroporation to a plurality of electrodes of an ablation catheter; and a control unit that, when the ablation is performed by supplying the electric power, controls a pulse voltage having a plurality of positive amplitude values such that the pulse voltage is applied to three or more application electrodes including the plurality of electrodes.
