US5800484A
Expired / Lapsed
US
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Multiple antenna ablation apparatus with expanded electrodes
Assignee: Angiodynamics Inc
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Filing: 1996-09-03
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Granted: 1998-09-01
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Expires: 2016-09-03
Abstract
Abstract An ablation apparatus has an introducer including an introducer lumen, a proximal portion and a distal portion. A handpiece with a proximal portion and a distal portion is coupled to the introducer proximal portion. Two or more electrodes are at least partially positioned in the introducer lumen. Each electrode is configured to be advanced from the introducer distal portion in a deployed state into a selected tissue site to define a volumetric ablation volume. A fluid delivery member is positioned on at least a portion of an exterior of one of the electrodes. The fluid delivery member is configured to be coupled to a fluid medium source. A cable is coupled to the electrodes.
Inventors
- 👤 Edward J. Gough
- 👤 Alan A. Stein
- 👤 Stuart D. Edwards
- 👤 Patrick J. Burns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:42
CPC Classifications
A; A61; A61N; A61N5/00; A61N5/02; A61N5/04; A61N5/045; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1477; A61B18/1482; A61B18/18; A61B18/1815; 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
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
114 words
An ablation apparatus, comprising: an introducer including an introducer lumen, a proximal portion and a distal portion; a handpiece with a proximal portion and a distal portion coupled to the introducer proximal portion; two or more electrodes at least partially positioned in the introducer lumen, wherein each electrode is configured to be advanced from the introducer distal portion in a deployed state into a selected tissue site to define a volumetric ablation volume; a porous fluid delivery member positioned on at least a portion of an exterior of one of the electrodes, wherein the fluid delivery member is configured to be coupled to a fluid medium source; and a cable coupled to the electrodes.
Claim 2
Dependent Claim
114 words
An ablation apparatus, comprising: an introducer including an introducer lumen, a proximal portion and a distal portion; a handpiece with a proximal portion and a distal portion coupled to the introducer proximal portion; two or more electrodes at least partially positioned in the introducer lumen, wherein each electrode is configured to be advanced from the introducer distal portion in a deployed state into a selected tissue site to define a volumetric ablation volume; a porous fluid delivery member positioned on at least a portion of an exterior of one of the electrodes, wherein the fluid delivery member is configured to be coupled to a fluid medium source; and a cable coupled to the electrodes.
Claim 3
Dependent Claim
15 words
The apparatus of claim 1, wherein a distal portion of the introducer is an electrode.
Claim 4
Dependent Claim
11 words
The apparatus of claim 1, wherein the electrodes are RF electrodes.
Claim 5
Dependent Claim
18 words
The apparatus of claim 1, further comprising: a sheath at least partially positioned around the fluid delivery member.
Claim 6
Dependent Claim
18 words
The apparatus of claim 4, wherein the sheath is slideable along an exterior of the fluid delivery member.
Claim 7
Dependent Claim
21 words
The apparatus of claim 1, wherein each electrode has at least one radius of curvature when advanced from introducer distal portion.
Claim 8
Dependent Claim
33 words
The apparatus of claim 1, further comprising: an electrode advancement and retraction device coupled to the electrodes to advance and retract the electrodes in and out of the distal portion of the introducer.
Claim 9
Dependent Claim
19 words
The apparatus of claim 7, further comprising: an insulation sleeve positioned around at least a portion of the introducer.
Claim 10
Dependent Claim
23 words
The apparatus of claim 1, further comprising: an insulation sleeve positioned around at least a portion of an exterior surface of an electrode.
Claim 11
Dependent Claim
20 words
The apparatus of claim 1, wherein the fluid delivery member is at least partially made of an open cell foam.
Claim 12
Dependent Claim
19 words
The apparatus of claim 1, wherein the fluid delivery member includes a lumen coupled to an electrolytic solution source.
Claim 13
Dependent Claim
11 words
The apparatus of claim 11, wherein the electrolytic solution is saline.
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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) | 2001-08-31 | 2002-03-02 | 2002-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-31 | 2006-03-02 | 2006-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-31 | 2010-03-02 | 2010-09-01 | $7700.00 | Window Closed / Lapsed |