Snare for endoscope
First Claim
1. A snare for an endoscope comprising an axially movable control wire extending within a flexible sheath and a snare loop, said snare loop connected to a distal end of said control wire, wherein when said control wire is axially advanced, said snare loop projects from a distal end of said flexible sheath and expands into a loop shape due to elasticity of said snare loop, whereas when said control wire is axially retracted, said snare loop retracts into the distal end of said flexible sheath and is folded into a closed shape;
- said snare loop comprising two elastic wires extending between two mutually secured portions, said two elastic wires extending parallel to each other and at least partially in close contact with each other, said two elastic wires being secured directly together at two positions longitudinally spaced from each other, each of said two mutually secured portions having an outer diameter not larger than a total of the diameters of said two elastic wires; and
said control wire comprising a portion of at least one of said two elastic wires that extends rearwardly from the one of said two mutually secured portions that is positioned at a rear end of said snare loop.
1 Assignment
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Accused Products
Abstract
A snare for an endoscope includes a control wire axially movably inserted in a flexible sheath. A snare loop formed by an elastic wire is connected to the distal end of the control wire. When the control wire is advanced, the snare loop projects from the distal end of the sheath and expands in a loop shape by its own elasticity. When the control wire is retracted, the snare loop is pulled into the sheath and folded. The snare loop is formed by two elastic wires between two mutually secured portions of the elastic wires, which are laid in parallel and in close contact with each other and secured together directly at two longitudinally spaced positions. The control wire is formed by an extending portion of at least one of the elastic wires that extends rearward from the mutually secured portion at the rear end of the snare loop.
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Citations
18 Claims
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1. A snare for an endoscope comprising an axially movable control wire extending within a flexible sheath and a snare loop, said snare loop connected to a distal end of said control wire, wherein when said control wire is axially advanced, said snare loop projects from a distal end of said flexible sheath and expands into a loop shape due to elasticity of said snare loop, whereas when said control wire is axially retracted, said snare loop retracts into the distal end of said flexible sheath and is folded into a closed shape;
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said snare loop comprising two elastic wires extending between two mutually secured portions, said two elastic wires extending parallel to each other and at least partially in close contact with each other, said two elastic wires being secured directly together at two positions longitudinally spaced from each other, each of said two mutually secured portions having an outer diameter not larger than a total of the diameters of said two elastic wires; and
said control wire comprising a portion of at least one of said two elastic wires that extends rearwardly from the one of said two mutually secured portions that is positioned at a rear end of said snare loop. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A snare for an endoscope comprising an axially movable control wire extending within a flexible sheath and a snare loop, said snare loop connected to a distal end of said control wire, wherein when said control wire is axially advanced, said snare loop projects from a distal end of said flexible sheath and expands into a loop shape due to elasticity of said snare loop, whereas when said control wire is axially retracted, said snare loop retracts into the distal end of said flexible sheath and is folded into a closed shape;
said snare loop comprising two elastic wires extending between two mutually secured portions, said two elastic wires extending parallel to each other and at least partially in close contact with each other, said two elastic wires being secured together at two positions longitudinally spaced from each other, both said elastic wires extending rearwardly from the mutually secured portion at a rear end of said snare loop to form said control wire. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A snare for an endoscope comprising an axially movable control wire extending within a flexible sheath, and a snare loop, said snare loop connected to a distal end of said control wire, wherein when said control wire is axially advanced, said snare loop projects from a distal end of said flexible sheath and expands into a loop shape due to elasticity of said snare loop, whereas when said control wire is axially retracted, said snare loop retracts into the distal end of said flexible sheath and is folded into a closed shape;
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said snare loop comprising two elastic wires extending between two mutually secured portions, said two elastic wires extending parallel to each other and at least partially in close contact with each other, said two elastic wires being secured together at two positions longitudinally spaced from each other, said two elastic wires also being secured together while extending axially in parallel and in close contact with each other at at least one intermediate portion of said control wire; and
said control wire comprising a portion of at least one of said two elastic wires that extends rearwardly from the one of said two mutually secured portions that is positioned at a rear end of said snare loop. - View Dependent Claims (16, 17, 18)
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Specification