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.

Abstract: [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.

Abstract: 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.

Abstract: Provided is an in-vivo indwelling tube having a high flap strength and passing smoothly through a conduit of an endoscope. A tubular member having a proximal side and a distal side; a proximal flap, including a base end on a proximal side and a free end on a distal side, on the proximal side of the tubular member; and a distal flap, including a base end on a distal side and a free end on a proximal side, on the distal side of the tubular member are arranged; where the tubular member includes a distal side first supporting member provided on a distal side of a midpoint between the base end and the free end of the distal flap or a proximal side first supporting member provided on a proximal side of a midpoint between the base end and the free end of the proximal flap.

Abstract: Provided is an in-vivo indwelling tube having a high flap strength and passing smoothly through a conduit of an endoscope. A tubular member having a proximal side and a distal side; a proximal flap, including a base end on a proximal side and a free end on a distal side, on the proximal side of the tubular member; and a distal flap, including a base end on a distal side and a free end on a proximal side, on the distal side of the tubular member are arranged; where the tubular member includes a distal side first supporting member provided on a distal side of a midpoint between the base end and the free end of the distal flap or a proximal side first supporting member provided on a proximal side of a midpoint between the base end and the free end of the proximal flap.

Abstract: Provided is an in-vivo indwelling tube having a high flap strength and capable of smoothing the passing through a conduit of an endoscope. A method for producing an in-vivo indwelling tube having one end and the other end, the method including the steps of: arranging, in a lumen of the first tubular member, the other end of the second tubular member; joining the first tubular member and the second tubular member; arranging the second tubular member in a lumen of a third tubular member in which an axial length is shorter than the second tubular member; joining the second tubular member and the third tubular member; arranging one end of the second tubular member in a lumen on the other end side of the fourth tubular member including a flap with a base end and a free end; and joining the second tubular member and the fourth tubular member.