Patent US6245062B1 successfully refreshed from Google Patents.
US6245062B1
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Directional reflector shield assembly for a microwave ablation instrument
Assignee: Maquet Cardiovascular LLC
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Filing: 1998-10-23
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Granted: 2001-06-12
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Expires: 2018-10-23
Abstract
Abstract A directional reflective shield assembly ( 25 ) is provided for a microwave ablation instrument ( 20 ) having an antenna ( 23 ) coupled to a transmission line ( 21 ). The antenna ( 23 ) is formed to generate an electric field sufficiently strong to cause tissue ablation. The shield assembly ( 25 ) includes a cradle device ( 26 ) disposed about the antenna ( 23 ) in a manner substantially shielding a surrounding area of the antenna ( 23 ) from the electric field radially generated therefrom. The cradle device ( 26 ) further provides a window portion ( 27 ) communicating with the antenna ( 23 ) which is strategically located relative the antenna to direct a majority of the field generally in a predetermined direction.
Inventors
- 👤 Dany Berube
- 👤 Robert E. Woodard
- 👤 Theodore C. Ormsby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:37
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1402; A61B18/18; A61B18/1815; A61B2018/00053; A61B2018/00273; A61B2018/00291; A61B2018/00315; A61B2018/00345; A61B2018/00351; A61B2018/00363; A61B2018/00571; A61B2018/00577; A61B2018/1405; A61B2018/1435; A61B2018/1437
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
145 words
A directional reflective shield assembly for a microwave ablation instrument having an antenna coupled to a transmission line for generating an electric field sufficiently strong to cause tissue ablation, said shield assembly comprising: a cradle device having a central axis disposed about the antenna in a manner substantially shielding a surrounding area of the antenna from the electric field radially generated therefrom, said cradle device defining a window portion communicating with said antenna and strategically located therewith to direct a majority of the field generally in a predetermined direction; and an insert device defining a recess formed and dimensioned for receipt of said antenna therein in a manner substantially isolating said antenna from direct contact with said cradle device, said recess having a longitudal axis off-set from the central axis of said cradle to position said antenna substantially proximate to and adjacent said window portion.
Claim 2
Dependent Claim
145 words
A directional reflective shield assembly for a microwave ablation instrument having an antenna coupled to a transmission line for generating an electric field sufficiently strong to cause tissue ablation, said shield assembly comprising: a cradle device having a central axis disposed about the antenna in a manner substantially shielding a surrounding area of the antenna from the electric field radially generated therefrom, said cradle device defining a window portion communicating with said antenna and strategically located therewith to direct a majority of the field generally in a predetermined direction; and an insert device defining a recess formed and dimensioned for receipt of said antenna therein in a manner substantially isolating said antenna from direct contact with said cradle device, said recess having a longitudal axis off-set from the central axis of said cradle to position said antenna substantially proximate to and adjacent said window portion.
Claim 3
Dependent Claim
25 words
The shield assembly as defined in claim 1 wherein, said cradle device is adapted to position said antenna proximate to and adjacent said window portion.
Claim 4
Dependent Claim
44 words
The shield assembly as defined in claim 1 wherein, said insert device defines a directional port extending into said recess and aligned to communicate with the window portion of said cradle device to direct said majority of the field generally in said predetermined direction.
Claim 5
Dependent Claim
29 words
The shield assembly as defined in claim 3 wherein, said insert device is adapted to position said antenna proximate to and adjacent said directional port and said window portion.
Claim 6
Dependent Claim
19 words
The shield assembly as defined in claim 4 wherein, said recess is configured for press-fit of the antenna therein.
Claim 7
Dependent Claim
18 words
The shield assembly as defined in claim 1 wherein, said cradle device is composed of a metallic material.
Claim 8
Dependent Claim
19 words
The shield assembly as defined in claim 1 wherein, said insert device is composed of a low-loss dielectric material.
Claim 9
Dependent Claim
15 words
The shield assembly as defined in claim 7 wherein, said low-loss dielectric material is TEFLON.
Claim 10
Dependent Claim
18 words
The shield assembly as defined in claim 7 wherein, said cradle device is composed of a metallic material.
Claim 11
Dependent Claim
23 words
The shield assembly as defined in claim 1 further including: an insulator in conductive contact with said cradle device to transfer heat therefrom.
Claim 12
Dependent Claim
17 words
The shield assembly as defined in claim 10 wherein, said insulator is disposed about said cradle member.
Claim 13
Dependent Claim
27 words
The shield assembly as defined in claim 11 wherein, said insulator includes a longitudinally extending bore formed and dimensioned for sliding receipt of said cradle device therein.
Claim 14
Dependent Claim
43 words
The shield assembly as defined in claim 12 wherein, said insulator defines a directional window extending into said bore and aligned to communicate with the window portion of said cradle device to direct said majority of the field generally in said predetermined direction.
Claim 15
Dependent Claim
23 words
The shield assembly as defined in claim 3 further including: an insulator in conductive contact with said cradle device to transfer heat therefrom.
Claim 16
Dependent Claim
27 words
The shield assembly as defined in claim 14 wherein, said insulator includes a longitudinally extending bore formed and dimensioned for sliding receipt of said cradle device therein.
Claim 17
Dependent Claim
51 words
The shield assembly as defined in claim 15 wherein, said insulator defines a directional window extending into said bore and aligned to communicate with the window portion of said cradle device and said directional port of said insert device to direct said majority of the field generally in said predetermined direction.
Claim 18
Dependent Claim
162 words
A directional reflective shield assembly for a microwave ablation instrument having an antenna coupled to a transmission line for generating an electric field sufficiently strong to cause tissue ablation, said shield assembly comprising: a cradle device having a central axis and defining a generally elongated cavity formed for longitudinal receipt of said antenna therein in a manner substantially shielding a surrounding area of the antenna from the electric field radially generated therefrom, said cradle device defining a window portion communicating with said antenna and strategically located therewith to direct a majority of the field generally in a predetermined direction; and an insert device disposed in said cavity and defining an elongated recess formed and dimensioned for receipt of said antenna longitudinally therein in a manner substantially isolating said antenna from direct contact with said cradle device, said recess having a longitudinal axis off-set from the central axis of said cradle to position said antenna substantially proximate to and adjacent said window portion.
Claim 19
Dependent Claim
162 words
A directional reflective shield assembly for a microwave ablation instrument having an antenna coupled to a transmission line for generating an electric field sufficiently strong to cause tissue ablation, said shield assembly comprising: a cradle device having a central axis and defining a generally elongated cavity formed for longitudinal receipt of said antenna therein in a manner substantially shielding a surrounding area of the antenna from the electric field radially generated therefrom, said cradle device defining a window portion communicating with said antenna and strategically located therewith to direct a majority of the field generally in a predetermined direction; and an insert device disposed in said cavity and defining an elongated recess formed and dimensioned for receipt of said antenna longitudinally therein in a manner substantially isolating said antenna from direct contact with said cradle device, said recess having a longitudinal axis off-set from the central axis of said cradle to position said antenna substantially proximate to and adjacent said window portion.
Claim 20
Dependent Claim
116 words
A directional reflective shield assembly for a microwave ablation instrument having an antenna coupled to a transmission line for generating an electric field sufficiently strong to cause tissue ablation, said shield assembly comprising: a cradle device disposed about the antenna in a manner substantially shielding a surrounding area of the antenna from the electric field radially generated therefrom, said cradle device defining a window portion communicating with said antenna and strategically located therewith to direct a majority of the field generally in a predetermined direction; and an insulator defining a longitudinally extending bore formed and dimensioned for sliding receipt of said cradle device therein, and in conductive contact with said cradle device to transfer heat therefrom.
Claim 21
Dependent Claim
116 words
A directional reflective shield assembly for a microwave ablation instrument having an antenna coupled to a transmission line for generating an electric field sufficiently strong to cause tissue ablation, said shield assembly comprising: a cradle device disposed about the antenna in a manner substantially shielding a surrounding area of the antenna from the electric field radially generated therefrom, said cradle device defining a window portion communicating with said antenna and strategically located therewith to direct a majority of the field generally in a predetermined direction; and an insulator defining a longitudinally extending bore formed and dimensioned for sliding receipt of said cradle device therein, and in conductive contact with said cradle device to transfer heat therefrom.
Claim 22
Dependent Claim
43 words
The shield assembly as defined in claim 18 wherein, said insulator defines a directional window extending into said bore and aligned to communicate with the window portion of said cradle device to direct said majority of the field generally in said predetermined direction.
References Cited (Backward Citations)
US4204549A
Cited
EP0048402A1
Cited
EP0139607A1
Cited
US4641649A
Cited
US4643186A
Cited
EP0248758A1
Cited
US5129396A
Cited
US5246438A
Cited
US5370644A
Cited
US5344441A
Cited
US5314466A
Cited
WO1994002204A1
Cited
US5405346A
Cited
US5861021A
Cited
US5800494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-06-11 | 2004-12-11 | 2005-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-06-11 | 2008-12-11 | 2009-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-06-11 | 2012-12-11 | 2013-06-12 | $7700.00 | Window Closed / Lapsed |