High frequency treatment instrument for endoscope
AssigneeHoya Corporation
InventorTeruo Ouchi
Life of this patent
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Abstract
A high frequency treatment instrument for an endoscope is provided. The high frequency treatment instrument is provided with an insulative flexible sheath, an operation wire inserted in the flexible sheath so as to be movable along an axial direction of the operation wire in the flexible sheath, and a hook-like electrode attached to a tip of the operation wire. The hook-like electrode includes a rod-like part which is elongated in parallel with the axial direction along a line shifted from an axis line of the operation wire, and a hook part elongated from the rod-like part to cross the axis line of the operation wire.
Claims18
A high frequency treatment instrument for an endoscope, comprising:
- an insulative flexible sheath;
- an operation wire inserted in the flexible sheath so as to be movable along an axial direction of the operation wire in the flexible sheath;
- and
- a hook-like electrode attached to a tip of the operation wire, wherein the hook-like electrode includes:
- a rod-like part that extends parallel to the axial direction of the operation wire and is spaced from an axis of the operation wire;
- and
- a slanting part that extends from a tip of the rod-like part in a slanting direction to cross the axis of the operation wire;
- and
- a hook part that extends from the slanting part in a direction to cross the axis of the operation wire;
- and
- wherein the hook part extends straight from a tip of the slanting part and then bends in a lateral direction to cross the axis of the operation wire, and the rod-like part, the slanting part and the hook part lie in one plane;
- and
- wherein the hook-like electrode is retractable into the flexible sheath to an extent that the entire rod-like part is within the flexible sheath.
Dependencies are inferred from the claim text.