Patent ID: 7458973

Claim:
A high-frequency snare for an endoscope, comprising: an electrically insulating sheath; an operation wire slidably inserted within the sheath; and a plurality of resilient twisted wires, proximal ends of the plurality of twisted wires being connected to a distal end of the operation wire, distal ends of the plurality of twisted wires being deposited with each other within an atmosphere of inactive gas and connected to each other by plasma welding, a proximal end side of the deposited ends of the plurality of twisted wires being connected to each other with a metallic connector formed by at least one of silver brazing and soldering, wherein, when the operation wire is operated to withdraw at least a proximal side portion of the plurality of twisted wires, the plurality of twisted wires are configured to be positioned within the sheath, and when the operation wire is operated such that the plurality of twisted wires protrude from the sheath, the plurality of twisted wires are configured to expand to form a resilient loop.