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US 7,404,817 B2Granted
High-frequency incision device
AssigneeOlympus Corporation
InventorTsutomu Okada
Life of this patent
Estimating the term…
Abstract
A high-frequency incision device includes a high-frequency treating wire 9, which forms a curved portion 11 so that a wire loop 10 formed by the wire 9 may be laterally tilted in a plane parallel to the center axis 7a of an actuating wire 7 when the wire 9 extends from the forward end of a flexible sheath 2.
Claims16
An endoscopic treatment apparatus comprising:
- an elongated sheath having a distal end portion and a through-hole which has an opening at the distal end portion;
- an elongated actuating member having a central axis, a distal end portion, and at least one elastic deformable portion provided at the distal end portion thereof, the actuating member being inserted into the through-hole of the sheath and movable relative to the sheath;
- a treatment section for performing a high-frequency treatment, connected to the elastic deformable portion of the actuating member, the treatment section being laterally extendable for forming a loop when the treatment section is extended from the opening of the sheath by movement of the actuating member, the loop having a distal end, a proximal end, a loop central axis connecting the distal and proximal ends thereof, the loop being symmetric with respect to the loop central axis, and a loop plane including the loop central axis, the loop plane being substantially parallel with a moving axis of the actuating member;
- the proximal end of the loop comprising first and second curved proximal ends connecting the loop to the elastic deformable portion, the first and second curved proximal ends being asymmetric with respect to the loop central axis,
- wherein the ioop central axis of the loop is tilted against the moving axis of the actuating member at a tilting angle, by elastic deformation of the elastic deformable portion due to an inherent elastically restoring force, when the treatment section and distal end of the actuating member are extended from the opening of the sheath.
2 more elements
An endoscopic treatment apparatus comprising:
- an elongated sheath which is to be inserted into a body cavity, and having an elongated direction, the sheath having a distal end portion and a through-hole which extends in the sheath along the elongated direction, the distal end portion having an opening communicating with the through-hole;
- an elongated actuating member which is inserted into the sheath to be movable relative to the sheath in the longitudinal direction thereof, the actuating member having a central axis, a distal end portion, and at least one elastic defonnable portion provided at the distal end portion thereof;
- a treatment section connected to the elastic deformable portion of the actuating member, the treatment section being expandable for fonning a ioop which is laterally extended against the central axis of the actuating member by an elastic deformation of the elastic deformable portion by an inherent elastically restoring force, when the treatment section is extended from the opening of the sheath by movement of the actuating member;
- a loop central axis connecting a distal end and a proximal end of the loop being kept to be substantially parallel or aligned with the central axis of the actuating member, when the treatment section is positioned in the through-hole of the sheath, the loop being symmetric with respect to the loop central axis;
- the proximal end of the loop comprising first and second curved proximal ends connecting the loop to the elastic deformable portion, the first and second curved proximal ends being asymmetric with respect to the loop central axis;
- and
- the loop central axis is tilted against a moving axis of the actuating member, and a loop plane including the loop central axis is generally parallel with the moving axis of the actuating member.
4 more elements
An endoscopic treatment apparatus comprising:
- an elongated sheath having a distal end portion and a through-hole which has an opening at the distal end portion;
- an elongated actuating member having a central axis, a distal end portion, and at least one elastic deformable portion provided at the distal end portion thereof, the actuating member being inserted into the through-hole of the sheath and movable relative to the sheath;
- a treatment section connected to the elastic deformable portion of the actuating member, the treatment section being laterally extendable for forming a loop when the treatment section is extended from the opening of the sheath by movement of the actuating member, the loop having a distal end, a proximal end, a loop central axis connecting the distal and proximal ends thereof, and a loop plane including the loop central axis, the loop being synunetric with respect to the loop central axis, the loop plane being substantially parallel with a moving axis of the actuating member;
- the proximal end of the loop comprising first and second curved proximal ends connecting the loop to the elastic deformable portion, the first and second curved proximal ends being asymmetric with respect to the loop central axis,
- wherein the loop central axis of the loop is tilted against the moving axis of the actuating member at a tilting angle, by elastic deformation of the elastic deformable portion due to an inherent elastically restoring force, when the treatment section and distal end of the actuating member are extended from the opening of the sheath.
2 more elements
Dependencies are inferred from the claim text.