Electrosurgical instrument
First Claim
1. An electrosurgical cutting device comprising an instrument body, first and second cutting blades at least one of which is pivotally mounted on the body to execute a scissor action with respect to the other blade, and electrical supply conductors associated with the body for supplying an electrosurgical voltage to the first and second blades, wherein the first blade is a composite blade comprising a conductive outer electrode, an inner conductive layer and, sandwiched between the outer electrode and the inner layer, an insulating layer, the supply conductors being connected respectively to the outer electrode and to the inner layer.
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Accused Products
Abstract
An electrosurgical cutting device comprises an instrument body, and first and second cutting blades, at least one of which is pivotally mounted on the body to execute a scissor action with respect to the other blade. Electrical supply conductors associated with the body supply an electrosurgical voltage to the first and second blades. The first blade is a composite blade comprising a conductive outer electrode, an inner conductive layer, sandwiched between the outer electrode and the inner layer, an insulating layer. The supply conductors are connected respectively to the outer electrode and to the inner layer.
1671 Citations
16 Claims
- 1. An electrosurgical cutting device comprising an instrument body, first and second cutting blades at least one of which is pivotally mounted on the body to execute a scissor action with respect to the other blade, and electrical supply conductors associated with the body for supplying an electrosurgical voltage to the first and second blades, wherein the first blade is a composite blade comprising a conductive outer electrode, an inner conductive layer and, sandwiched between the outer electrode and the inner layer, an insulating layer, the supply conductors being connected respectively to the outer electrode and to the inner layer.
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14. Electrosurgical cutting apparatus including an electrosurgical generator and a bipolar electrosurgical cutting device, the bipolar electrosurgical device comprising an instrument body, first and second cutting blades at least one of which is pivotally mounted on the body to execute a scissor action with respect to the other blade, and electrical supply conductors associated with the body for supplying an electrosurgical voltage to the first and second blades, wherein the first blade is a composite blade comprising a conductive outer electrode, an inner conductive layer and, sandwiched between the outer electrode and the inner layer, an insulating layer, the supply conductors being connected respectively to the outer electrode and to the inner layer, the generator having an unbalanced output with an active terminal and a passive terminal, wherein the supply conductor connections are so arranged that for tissue desiccation and mechanical cutting the active terminal is connected to the outer electrode of the composite first blade.
- 15. Electrosurgical apparatus including an electrosurgical generator and a bipolar electrosurgical cutting device, the bipolar electrosurgical cutting device comprising an instrument body, first and second cutting blades at least one of which is pivotally mounted on the body to execute a scissor action with respect to the other blade, and electrical supply conductors associated with the body for supplying an electrosurgical voltage to the first and second blades, wherein the first blade is a composite blade comprising a conductive outer electrode, an inner conductive layer and, sandwiched between the outer electrode and the inner layer, an insulating layer, the supply conductors being connected respectively to the outer electrode and to the inner layer, the generator having an unbalanced output with an active terminal and a passive terminal, wherein the supply conductor connections are so arranged that for electrosurgical cutting the passive terminal is connected to the outer electrode of the composite first blade.
Specification