Patent EP0508453A1 successfully refreshed from Google Patents.
EP0508453A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Surgical electrically shielded radiotranslucent cannula for r.f. patient protection
Assignee: United States Surgical Corp
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Filing: 1992-04-10
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Granted: —
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Expires: 2012-04-10
Abstract
Abstract A device for dissipating electrical energy from a surgical device is provided. The electrical energy is induced on the surgical device when a charge-inducing instrument, e.g. an unipolar electrocautery device, is energized in proximity thereto. The induced energy is dissipated by conveying the energy along an electrically conductive element 34 to an energy dissipation region. In a preferred embodiment of the invention, the surgical device is a cannula 26 fabricated from a dielectric material, e.g., fiberglass, and induced electrical energy is dissipated by contacting the energy dissipation 36 region, e.g., a conductive band 36 around the periphery of the cannula, with the body wall of the patient. An alternative means for grounding is achieved by providing an electrical fitting on a cannula housing which remains external to the patient's body, and securing a grounding wire thereto.
Inventors
- 👤 Walter S. Henning
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 08:49
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1487; A61B17/00; A61B17/34; A61B17/3417; A61B17/3421; A61B17/3474; A61B18/1206; A61B18/1233; A61B18/1402; A61B2017/00831; A61B2017/00902; A61M; A61M13/00; A61M13/003; A61M2205/00; A61M2205/02; A61M2205/0233; Y; Y10; Y10S; Y10S128/00; Y10S128/908
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
73 words
A surgical device comprising: (a) a tubular member defining a longitudinal axis adapted to receive an electrical charge-inducing element, said tubular member being fabricated from a substantially dielectric material; (b) electrical conductive means associated with said tubular member for conducting induced electrical energy along the longitudinal axis of said tubular member; and (c) energy dissipation means communicating electrically with said electrical conductive means, said energy dissipation means facilitating grounding of said tubular member.
Claim 2
Dependent Claim
14 words
A surgical device according to claim 1 wherein said tubular member is a cannula.
Claim 3
Dependent Claim
15 words
A surgical device according to claim 1 wherein said charge-inducing element is an electrocautery device.
Claim 4
Dependent Claim
14 words
A surgical device according to claim 1 wherein said substantially dielectric material is radiolucent.
Claim 5
Dependent Claim
13 words
A surgical device according to claim 4 wherein said radiolucent material comprises fiberglass.
Claim 6
Dependent Claim
49 words
A surgical device according to claim 1 wherein said electrical conductive means is selected from the group consisting of one or more electrically conductive wires, electrically conductive particles interspersed within said tubular member, an electrically conductive coating, an electrically conductive surface treatment, an electrically conductive ink, and combinations thereof.
Claim 7
Dependent Claim
24 words
A surgical device according to claim 1 wherein said electrical conductive means is positioned on the interior or exterior surface of said tubular member.
Claim 8
Dependent Claim
31 words
A surgical device according to claim 1 wherein said electrical conductive means assumes a substantially linear, helical or random configuration as it extends along the longitudinal axis of said tubular member.
Claim 9
Dependent Claim
25 words
A surgical device according to claim 1 wherein said energy dissipation means comprises an electrically conductive band mounted to the periphery of said tubular member.
Claim 10
Dependent Claim
18 words
A surgical device according to claim 9 wherein said electrically conductive band is movable along said tubular member.
Claim 11
Dependent Claim
19 words
A surgical device according to claim 9 wherein said electrically conductive band is fixedly secured to said tubular member.
Claim 12
Dependent Claim
86 words
A trocar comprising: (a) an obturator having a piercing tip at a distal end thereof; (b) a cannula defining a longitudinal axis, said cannula being sized and dimensioned to receive said obturator and an electrical-charge inducing element, and being fabricated from a substantially dielectric material; (b) electrical conductive means associated with said cannula for conducting induced electrical energy along the longitudinal axis of said cannula; and (c) energy dissipation means communicating electrically with said electrical conductive means, said energy dissipation means facilitating grounding of said cannula.
Claim 13
Dependent Claim
19 words
A trocar according to claim 12 wherein said cannula is radiolucent and said charge-inducing element is an electrocautery device.
Claim 14
Dependent Claim
27 words
A trocar according to claim 12 wherein said cannula is fixedly secured to a cannula housing and said energy dissipation means is associated with said cannula housing.
Claim 15
Dependent Claim
22 words
A trocar according to claim 14 wherein said energy dissipation means is an electrical fitting adapted to cooperate with a grounding wire.
Claim 16
Dependent Claim
38 words
A trocar according to claim 12 wherein said energy dissipation means is located on said cannula so as to ground said cannula to a body wall of a patient when said cannula is introduced through said body wall.
Claim 17
Dependent Claim
78 words
An accessory surgical device comprising: (a) a housing fabricated from a substantially dielectric material and adapted to be mounted to a tubular member, said tubular member defining a longitudinal axis and being adapted to receive an electrical charge-inducing element; (b) electrical conductive means associated with said housing for conducting an induced electrical charge longitudinally along said housing; and (c) energy dissipation means communicating electrically with said electrical conductive means, said energy dissipation means permitting grounding of said housing.
Claim 18
Dependent Claim
35 words
An accessory device according to claim 17 wherein said accessory device is a gripping device, said tubular member is a cannula, and said housing is adapted to be mounted to the exterior of said cannula.
Claim 19
Dependent Claim
29 words
An accessory device according to claim 18 wherein said cannula is fixedly secured to a cannula housing and said gripping device housing is integrally connected to said cannula housing.
Claim 20
Dependent Claim
32 words
An accessory device according to claim 18 wherein said gripping device includes means for engaging a body wall of a patient to retain said cannula in position relative to said body wall.
Claim 21
Dependent Claim
23 words
An accessory device according to claim 20 wherein said engaging means comprises helical gripping projections extending radially outward from said gripping device housing.
Claim 22
Independent Claim
114 words
A method for dissipating induced electrical energy from a surgical device comprising: (a) providing a tubular member defining a longitudinal axis and being fabricated from a dielectric material, said tubular member comprising (i) electrical conductive means for conducting electrical energy along said longitudinal axis and (ii) energy dissipation means communicating electrically with said electrical conductive means, said tubular member being adapted to receive an electrical charge-inducing element; (b) introducing said tubular member through a body wall of a patient; (c) introducing an electrical charge-inducing element through said tubular member and energizing said electrical charge-inducing element therewithin; and (d) grounding said tubular member through electrical communication between said energy dissipation means and a grounding medium.
Claim 23
Dependent Claim
27 words
A method according to claim 22 wherein said tubular member is a cannula fabricated from a radiolucent material and said electrical charge-inducing element is an electrocautery device.
Claim 24
Dependent Claim
26 words
A method according to claim 22 wherein said tubular member is grounded through contact between said energy dissipation means and said body wall of said patient.
Claim 25
Dependent Claim
40 words
A method according to claim 22 wherein said tubular member is associated with a housing and said housing remains external to said body wall when said tubular member is introduced therethrough, said energy dissipation means being associated with said housing.
Claim 26
Independent Claim
121 words
A method for dissipating induced electrical energy from a surgical device comprising: (a) providing a housing adapted to be mounted to a tubular member which defines a longitudinal axis, said housing being fabricated from a dielectric material and comprising (i) electrical conductive means for conducting electrical energy along said longitudinal axis and (ii) energy dissipation means communicating electrically with said electrical conductive means; (b) mounting said housing to said tubular member and introducing said tubular member through a body wall of a patient; (c) introducing an electrical charge-inducing element through said tubular member and energizing said electrical charge-inducing element therewithin; and (d) grounding said tubular member and said housing through electrical communication between said energy dissipation means and a grounding medium.
Claim 27
Dependent Claim
36 words
A method according to claim 26 wherein said housing is a gripping device and said tubular member is a cannula, said gripping device being adapted to retain said cannula in position relative to said body wall.
Claim 28
Dependent Claim
27 words
A method according to claim 27 wherein said cannula is mounted to a cannula housing and said gripping device housing is integrally mounted to said cannula housing.
References Cited (Backward Citations)
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