Bipolar clamp for HF surgery
First Claim
1. A bipolar clamp for use in high-frequency surgery, in particular for coagulation of tissue, the bipolar clamp comprising:
- at least two bipolar clamping parts movable relative to one another, between an open position and a coagulation position, and in the coagulation position the clamping parts define a grasping region, and configured to grasp tissue in the grasping region, each clamping part comprising;
an electrically conductive core;
a thin-layer electrical insulation surrounding the electrically conductive core; and
a plurality of electrodes configured to coagulate the tissue, arranged as pin electrodes on the electrically conductive core and protruding through the thin-layer electrical insulation into the grasping region,wherein each clamping part is made substantially completely of the respective electrically conductive core, andwherein a ratio of heat capacities of all the electrodes on a particular electrically conductive core to a heat capacity of the particular electrically conductive core is such that during operation, heating of the clamping parts is substantially prevented.
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Accused Products
Abstract
A bipolar clamp for high-frequency surgery, in particular for coagulating tissue, having at least two bipolar clamping parts which are movable relative to one another, defining a grasping region between an open position and a coagulation position (e.g., closed position) and having electrodes for coagulating tissue that is grasped by the clamping parts in the grasping region. The clamping parts are formed of an electrically conductive core which is surrounded by a thin-layer electrical insulation and the electrodes are arranged on the clamping parts as thin pin electrodes that protrude through the thin-layer electrical insulation into the grasping region.
213 Citations
17 Claims
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1. A bipolar clamp for use in high-frequency surgery, in particular for coagulation of tissue, the bipolar clamp comprising:
at least two bipolar clamping parts movable relative to one another, between an open position and a coagulation position, and in the coagulation position the clamping parts define a grasping region, and configured to grasp tissue in the grasping region, each clamping part comprising; an electrically conductive core; a thin-layer electrical insulation surrounding the electrically conductive core; and a plurality of electrodes configured to coagulate the tissue, arranged as pin electrodes on the electrically conductive core and protruding through the thin-layer electrical insulation into the grasping region, wherein each clamping part is made substantially completely of the respective electrically conductive core, and wherein a ratio of heat capacities of all the electrodes on a particular electrically conductive core to a heat capacity of the particular electrically conductive core is such that during operation, heating of the clamping parts is substantially prevented. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A bipolar clamp for use in high-frequency surgery, in particular for coagulation of tissue, the bipolar clamp comprising:
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at least two bipolar clamping parts movable relative to one another, between an open position and a coagulation position, and in the coagulation position the clamping parts define a grasping region, and configured to grasp tissue in the grasping region, each clamping part comprising; an electrically conductive core; a thin-layer electrical insulation surrounding the electrically conductive core; and a plurality of electrodes configured to coagulate the tissue, arranged as pin electrodes on the electrically conductive core and protruding through the thin-layer electrical insulation into the grasping region, wherein each clamping part is made substantially completely of the respective electrically conductive core, and wherein a total volume of the electrodes on a particular electrically conductive core is smaller than a total volume of the particular electrically conductive core.
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17. A bipolar clamp for use in high-frequency surgery, in particular for coagulation of tissue, the bipolar clamp comprising:
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at least two bipolar clamping parts movable relative to one another, between an open position and a coagulation position, and in the coagulation position the clamping parts define a grasping region, and configured to grasp tissue in the grasping region, each clamping part comprising; an electrically conductive core; a thin-layer electrical insulation surrounding the electrically conductive core; and a plurality of electrodes configured to coagulate the tissue, arranged as pin electrodes on the electrically conductive core and protruding through the thin-layer electrical insulation into the grasping region, wherein each clamping part is made substantially completely of the respective electrically conductive core, and wherein a total surface area of the electrodes on a particular electrically conductive core is smaller than a total surface area of the respective clamping part.
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Specification