US5672173A
Expired / Lapsed
US
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Multiple antenna ablation apparatus and method
Assignee: Angiodynamics Inc
•
Filing: 1995-12-19
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Granted: 1997-09-30
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Expires: 2015-12-19
Abstract
Abstract An ablation treatment apparatus has a multiple antenna device with a primary antenna and a secondary antenna. The secondary antenna is positioned in a lumen of the primary antenna as the primary antenna is introduced through tissue to a selected tissue site. At the tissue site the secondary antenna is deployed from the primary antenna in a lateral direction relative to a longitudinal axis of the primary antenna. At least a portion of a distal end of the secondary antenna is structurally less rigid than the primary antenna. The primary antenna is constructed to be rigid enough to be introduced and advanced through tissue. A cable couples the energy source to one or more of the antennas.
Inventors
- 👤 Edward J. Gough
- 👤 Alan A. Stein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:02
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/04; A61B18/12; A61B18/14; A61B18/1477; A61B18/1482; A61B18/1815; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/06; A61N1/40; A61N1/403; A61B18/1206; A61B18/1402; A61B18/1485; A61B18/1492; A61B17/00; A61B2017/00017; A61B2017/00022; A61B2017/00084; A61B2017/00101; A61B2018/00005; A61B2018/00011; A61B2018/00023; A61B2018/00053; A61B2018/00184; A61B2018/00196; A61B2018/00273; A61B2018/00315; A61B2018/00452; A61B2018/00476; A61B2018/00571; A61B2018/00577; A61B2018/00636; A61B2018/00666; A61B2018/00678; A61B2018/00696; A61B2018/00702; A61B2018/00708; A61B2018/00726; A61B2018/00744; A61B2018/00761; A61B2018/00773; A61B2018/00779; A61B2018/00791; A61B2018/00797; A61B2018/00827; A61B2018/00875; A61B2018/00892; A61B2018/124; A61B2018/1246; A61B2018/1253; A61B2018/126; A61B2018/1405; A61B2018/1425; A61B2018/143; A61B2018/1432; A61B2018/1435; A61B2018/1472; A61B18/16; A61B2018/162; A61B2218/00; A61B2218/001; A61B2218/002; A61M; A61M25/00; A61M25/0067; A61M25/0068; A61M25/007; A61M3/00; A61M3/02; A61M3/0279; A61N5/00; A61N5/02; A61N5/04
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
152 words
An ablation treatment apparatus, comprising: a multiple antenna device configured to be coupled to an energy source and including a primary antenna with a lumen, a distal end sufficiently sharp to pierce tissue and a longitudinal axis, and a secondary antenna including a distal portion and at least partially positioned in the primary antenna as the primary antenna is introduced through tissue, at least a part of the distal portion is configured to be deployed from the primary antenna in a lateral direction relative to the longitudinal axis at a selected tissue mass with at least one radius of curvature, at least a portion of a distal end of the secondary antenna is constructed to be structurally less rigid than the primary antenna, and the primary antenna is constructed to be rigid enough to be introduced through tissue; and at least one cable coupling the multiple antenna device to the energy source.
Claim 2
Dependent Claim
152 words
An ablation treatment apparatus, comprising: a multiple antenna device configured to be coupled to an energy source and including a primary antenna with a lumen, a distal end sufficiently sharp to pierce tissue and a longitudinal axis, and a secondary antenna including a distal portion and at least partially positioned in the primary antenna as the primary antenna is introduced through tissue, at least a part of the distal portion is configured to be deployed from the primary antenna in a lateral direction relative to the longitudinal axis at a selected tissue mass with at least one radius of curvature, at least a portion of a distal end of the secondary antenna is constructed to be structurally less rigid than the primary antenna, and the primary antenna is constructed to be rigid enough to be introduced through tissue; and at least one cable coupling the multiple antenna device to the energy source.
Claim 3
Dependent Claim
32 words
The apparatus of claim 1, wherein the primary antenna has an ablation surface with a length that is at least 20% of a length of an ablation surface of the secondary antenna.
Claim 4
Dependent Claim
32 words
The apparatus of claim 1, wherein the primary antenna has an ablation surface with a length that is at least one-third of a length of an ablation surface of the secondary antenna.
Claim 5
Dependent Claim
32 words
The apparatus of claim 1, wherein the primary antenna has an ablation surface with a length that is at least one-half of a length of an ablation surface of the secondary antenna.
Claim 6
Dependent Claim
38 words
The apparatus of claim 1, wherein two secondary antennas are provided and laterally deployed from the primary antenna, each of the primary and secondary antennas having an ablation surface to create an ablation volume between the ablation surfaces.
Claim 7
Dependent Claim
38 words
The apparatus of claim 1, wherein three secondary antennas are provided and laterally deployed from the primary antenna, each of the primary and secondary antennas having an ablation surface to create an ablation volume between the ablation surfaces.
Claim 8
Dependent Claim
27 words
The apparatus of claim 1, further comprising: an insulation sleeve positioned in a surrounding relationship around at least a portion of an exterior of the primary antenna.
Claim 9
Dependent Claim
19 words
The apparatus of claim 7, wherein the insulation sleeve is adjustably moveable along an exterior of the primary antenna.
Claim 10
Dependent Claim
27 words
The apparatus of claim 1, further comprising: an insulation sleeve positioned in a surrounding relationship around at least a portion of an exterior of the secondary antenna.
Claim 11
Dependent Claim
19 words
The apparatus of claim 9, wherein the insulation sleeve is adjustably moveable along an exterior of the secondary antenna.
Claim 12
Dependent Claim
22 words
The apparatus of claim 1, further including a ground pad electrode with the primary and secondary antennas operating in a monopolar mode.
Claim 13
Dependent Claim
14 words
The apparatus of claim 1, wherein the primary and secondary antennas are RF antennas.
Claim 14
Dependent Claim
14 words
The apparatus of claim 1, wherein the primary and secondary antennas are microwave antennas.
Claim 15
Dependent Claim
15 words
The apparatus of claim 1, wherein the apparatus is switchable between bipolar and monopolar operation.
Claim 16
Dependent Claim
23 words
The apparatus of claim 1, wherein the primary antenna is hollow and coupled to an infusion medium source to receive an infusion medium.
Claim 17
Independent Claim
187 words
A method for creating an ablation volume in a selected tissue mass, comprising: providing an ablation device with a primary antenna, a secondary antenna with a distal end, and an energy source coupled to one or both of the antennas, wherein at least a distal end of the secondary antenna is structurally less rigid than the primary antenna, the primary antenna having a distal end sufficiently sharp to pierce tissue and the secondary antenna including a distal portion with at least a portion of the distal portion configured to be deployed from the primary antenna with at least one radius of curvature; inserting the primary antenna into the selected tissue mass with the secondary antenna distal end positioned in the primary antenna lumen; advancing the secondary antenna distal end out of the primary antenna lumen and into the selected tissue mass in a lateral direction relative to a longitudinal axis of the primary antenna; delivering electromagnetic energy from one of a primary antenna ablation surface, a secondary antenna ablation surface or both to the selected tissue mass; and creating an ablation volume in the selected tissue mass.
Claim 18
Independent Claim
187 words
A method for creating an ablation volume in a selected tissue mass, comprising: providing an ablation device with a primary antenna, a secondary antenna with a distal end, and an energy source coupled to one or both of the antennas, wherein at least a distal end of the secondary antenna is structurally less rigid than the primary antenna, the primary antenna having a distal end sufficiently sharp to pierce tissue and the secondary antenna including a distal portion with at least a portion of the distal portion configured to be deployed from the primary antenna with at least one radius of curvature; inserting the primary antenna into the selected tissue mass with the secondary antenna distal end positioned in the primary antenna lumen; advancing the secondary antenna distal end out of the primary antenna lumen and into the selected tissue mass in a lateral direction relative to a longitudinal axis of the primary antenna; delivering electromagnetic energy from one of a primary antenna ablation surface, a secondary antenna ablation surface or both to the selected tissue mass; and creating an ablation volume in the selected tissue mass.
Claim 19
Dependent Claim
39 words
The method of claim 16, wherein two secondary antennas, each having an ablation surface, are advanced from the primary antenna, and an ablation volume is created between the two secondary antennas ablation surfaces and the primary electrode ablation surface.
Claim 20
Dependent Claim
21 words
The method of claim 17, wherein the two secondary antennas are advanced out of a distal end of the primary antenna.
Claim 21
Dependent Claim
21 words
The method of claim 17, wherein the two secondary antennas are advanced out of separate ports formed in the primary antenna.
Claim 22
Dependent Claim
20 words
The method of claim 17, wherein the two secondary antennas are advanced from the primary antenna and define a plane.
Claim 23
Dependent Claim
15 words
The method of claim 16, wherein three secondary antennas are advanced from the primary antenna.
Claim 24
Dependent Claim
33 words
The method of claim 21, wherein each of the three secondary antennas and the primary antenna has an ablation surface, and an ablation volume is formed between the ablation surfaces of the antennas.
Claim 25
Dependent Claim
30 words
The method of claim 16, wherein the primary electrode has an ablation surface that is at least equal to 20% or more of an ablation surface of the secondary antenna.
Claim 26
Dependent Claim
30 words
The method of claim 16, wherein the primary electrode has an ablation surface that is at least equal to one-third or more of an ablation surface of the secondary antenna.
Claim 27
Dependent Claim
30 words
The method of claim 16, wherein the primary electrode has an ablation surface that is at least equal to one-half or more of an ablation surface of the secondary antenna.
Claim 28
Dependent Claim
17 words
The method of claim 16, wherein the primary and secondary antennas are operated in a monopolar mode.
Claim 29
Dependent Claim
15 words
The method of claim 16, wherein the ablation device is operated in a bipolar mode.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-09-29 | 2001-03-31 | 2001-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-09-29 | 2005-03-31 | 2005-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-09-29 | 2009-03-31 | 2009-09-30 | $7700.00 | Window Closed / Lapsed |