Instrument for endoscopic surgery
First Claim
1. An instrument for endoscopic surgery, comprising:
- a casing having proximal and distal ends,a sliding tube having proximal and distal ends, which extends into the casing with its proximal end side and which is disposed longitudinally slidable between an extended and a retracted position with respect to the casing,an actuating mechanism operably engaging said sliding tube for sliding said sliding tube between said extended and retracted positions,an electrode tube having proximal and distal ends, which extends through the sliding tube and into the casing and at its proximal end region is axially lockable with respect to said casing, andtwo insulated wire pieces having proximal and distal ends, which wire pieces extend through the inside of the electrode tube, the wire pieces at their distal ends being fitted with branches of which the distal ends protrude beyond the electrode tube distal end and the sliding tube distal end, which protruding branches are spread apart from one another slanted in diverging directions, which branches are elastically bendable with respect to each other in a radial direction against a spring force acting in the direction of spreading during a movement of the sliding tube, and which comprise insulated bending sections and, at the distal ends of the bending sections, metallic electrodes, and which wire pieces at their proximal ends comprise contact elements which are electrically connected to said electrodes and which contact elements are adapted to be connected to a high frequency power supply,wherein said electrodes are formed as cutting blades having cutting edges, which are adapted to be moved with respect to each other in a scissor-like fashion under the action of the sliding tube on said bending sections.
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Accused Products
Abstract
The invention is related to an instrument for endoscopic surgery. The instrument comprises a casing 10, further comprises a sliding tube 16 which extends into the casing with its proximal end 20 and which is disposed longitudinally slidable with respect to the casing by means of an actuating mechanism 38, further comprises an electrode tube 18 which extends through the sliding tube 16, which extends into the casing with its proximal end and is axially lockable therein, and further comprises two isolated wire pieces 32 which extend through the inside of the electrode tube 18. The wire pieces 32 which are adapted to be subjected to a high frequency current comprise branches 30 which protrude over the electrode tube 18 and the sliding tube 16 at their distal end, which are spread apart from one another slanted in opposite directions, which are elastically bendable with respect to each other in a radial direction against a spring force acting in the direction of spreading during a movement of the sliding tube 16, and which carry isolated bending sections 48 and, at their free ends, metallic electrodes 56. In order to be able to mechanically cut as well as coagulate, in a bipolar manner, biological tissue with the instrument, it is proposed according to the invention that the electrodes 56 are formed to be cutting blades having cutting edges 54, which are adapted to be moved with respect to each other in a scissor-like fashion under the action of the sliding tube 16 on the bending sections 48.
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Citations
12 Claims
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1. An instrument for endoscopic surgery, comprising:
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a casing having proximal and distal ends, a sliding tube having proximal and distal ends, which extends into the casing with its proximal end side and which is disposed longitudinally slidable between an extended and a retracted position with respect to the casing, an actuating mechanism operably engaging said sliding tube for sliding said sliding tube between said extended and retracted positions, an electrode tube having proximal and distal ends, which extends through the sliding tube and into the casing and at its proximal end region is axially lockable with respect to said casing, and two insulated wire pieces having proximal and distal ends, which wire pieces extend through the inside of the electrode tube, the wire pieces at their distal ends being fitted with branches of which the distal ends protrude beyond the electrode tube distal end and the sliding tube distal end, which protruding branches are spread apart from one another slanted in diverging directions, which branches are elastically bendable with respect to each other in a radial direction against a spring force acting in the direction of spreading during a movement of the sliding tube, and which comprise insulated bending sections and, at the distal ends of the bending sections, metallic electrodes, and which wire pieces at their proximal ends comprise contact elements which are electrically connected to said electrodes and which contact elements are adapted to be connected to a high frequency power supply, wherein said electrodes are formed as cutting blades having cutting edges, which are adapted to be moved with respect to each other in a scissor-like fashion under the action of the sliding tube on said bending sections. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification