Patent EP0717966A1 successfully refreshed from Google Patents.
EP0717966A1
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Electrosurgical bipolar scissors
Assignee: Gyrus Medical Ltd
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Filing: 1995-12-14
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Granted: —
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Expires: 2015-12-14
Abstract
Abstract An electrosurgical cutting device comprises an instrument body (10), and first and second cutting blades (12,14) 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 (24) associated with the body (10) supply an electrosurgical voltage to the first and second blades (12,14). The first blade (12) is a composite blade comprising a conductive outer electrode (12A), an inner conductive layer (12C) and, sandwiched between the outer electrode and the inner layer, an insulating layer (12B). The supply conductors (24) are connected respectively to the outer electrode (12A) and to the inner layer (12C).
Inventors
- 👤 Nigel M. Goble
- 👤 Colin C. O. Goble
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 05:33
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1442; A61B18/1445; A61B18/1402; A61B17/28; A61B17/29; A61B2017/2926; A61B2017/2945; A61B2018/00053; A61B2018/00107; A61B18/1206; A61B2018/1246; A61B2018/126; A61B2018/1405; A61B2018/1412; A61B2018/1425; A61B2018/1432
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
106 words
An electrosurgical cutting device comprising an instrument body (10), first and second cutting blades (12,14) 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 (24) associated with the body for supplying an electrosurgical voltage to the first and second blades, wherein the first blade (12) is a composite blade comprising a conductive outer electrode (12A), an inner conductive layer (12C) and, sandwiched between the outer electrode and the inner layer, an insulating layer (12B), the supply conductors being connected respectively to the outer electrode and to the inner layer.
Claim 2
Dependent Claim
21 words
A device according to claim 1, wherein one of the supply conductors (24) is connected directly to the inner layer (12C).
Claim 3
Dependent Claim
46 words
A device according to claim 1, wherein one of the supply conductors (24) is coupled to the second blade (14) and is electrically connected to the inner layer (12C) of the composite first blade (12) by electrical contact between the second blade and the inner layer.
Claim 4
Dependent Claim
62 words
A device according to claim 3, wherein the second blade (14) has a conductive body which is in electrical contact with the inner layer (12C) of the composite first blade (12), and wherein said one supply conductor is connected to the conductive body so that the conductive body is electrically connected in series between said one supply conductor and the inner layer.
Claim 5
Independent Claim
42 words
A device according to any one of claims 1 to 4, wherein each blade (12,14) has a cutting edge (12D,14D) which is so oriented that the blades can execute a progressive shearing action, each cutting edge being formed of a metallic material.
Claim 6
Independent Claim
31 words
A device according to any one of claims 1 to 5, wherein the second blade (14) has an entirely metallic body and its cutting edge (14D) is formed on the body.
Claim 7
Independent Claim
23 words
A device according to any one of claims 1 to 6, wherein both blades (12,14) are pivotally mounted on the instrument body (10).
Claim 8
Independent Claim
159 words
A device according to any one of claims 1 to 7, wherein each blade (12,14) comprises an elongate member having an outer surface (12E), an inner shearing surface (12C), and a cutting edge (12D,14D) running along the blade and defining a boundary between the shearing surface and the outer surface along one side of the shearing surface, wherein the blades are so mounted on the instrument body (10) that their respective cutting edges execute a progressive shearing action as the blades are moved to a closed configuration with the shearing surfaces in a face-to-face relationship, wherein the outer surface (12E) of the composite first blade defines a cutting face running (12F) along the blade adjacent to its cutting edge, each of the inner conductive layer (12C), the insulating layer (12B) and the outer electrode (12A) being exposed along the cutting face with the shearing surface being formed, at least adjacent to the cutting edge, on the inner conductive layer.
Claim 9
Dependent Claim
47 words
A device according to claim 8, wherein the second blade (14) has a conductive body and also has cutting face (14F) running along the blade adjacent to its cutting edge (14D), the conductive body being exposed at least at the cutting edge and along the cutting face.
Claim 10
Dependent Claim
30 words
A device according to claim 9, wherein the conductive body of the second blade (14) is exposed over at least a major part of the shearing surface of that blade.
Claim 11
Independent Claim
64 words
A device according to any one of claims 8 to 10, wherein the outer electrode (12A), the insulating layer (12B) and the inner conductive layer (12C) of the composite first blade (12) are each exposed along an electrosurgical cutting surface which forms part of said outer surface of the composite first blade running along that blade adjacent to the shearing surface of that blade.
Claim 12
Dependent Claim
79 words
A device according to claim 11, wherein the electrosurgical cutting surface extends along the composite first blade (12) adjacent to the opposite side of the shearing surface of that blade from the cutting edge (12D), and wherein the blades (12,14) are so shaped and mounted that, in their closed configuration, the cutting edge (14D) of the second blade runs along the shearing surface of the composite first blade and is spaced from the composite first blade electrosurgical cutting surface.
Claim 13
Independent Claim
25 words
A device according to any one of claims 1 to 12, further comprising a switch (34) for reversing the connections of the supply conductors (24).
Claim 14
Dependent Claim
70 words
Electrosurgical cutting apparatus including an electrosurgical generator (26) and a bipolar electrosurgical cutting device according to any one of claims 1 to 13, the generator having an unbalanced output with an active terminal (26A) and a passive terminal (26B), wherein the supply conductor connections are so arranged that for tissue desiccation and mechanical cutting the active terminal is connected to the outer electrode (12A) of the composite first blade (12).
Claim 15
Dependent Claim
66 words
Electrosurgical apparatus including an electrosurgical generator (26) and a bipolar electrosurgical cutting device according to any one of claims 1 to 13, the generator having an unbalanced output with an active terminal (26A) and a passive terminal (26B), wherein the supply conductor connections are so arranged that for electrosurgical cutting the passive terminal is connected to the outer electrode (12A) of the composite first blade (12).
Claim 16
Dependent Claim
24 words
Apparatus according to claim 15, wherein the cutting device includes a switch (34) for reversing the connections of the generator terminals to the blades.
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US4674498A
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WO1993008754A1
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