US6671561B1
Expired / Lapsed
US
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Catheter with electrode having hydrogel layer
Assignee: Biosense Webster Inc
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Filing: 2000-05-01
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Granted: 2003-12-30
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Expires: 2020-05-01
Abstract
Abstract A catheter having an improved electrode that minimizes irritation to the heart tissue and counters the occurrence of foreign body reactions is provided. The catheter comprises an elongated, flexible catheter body having proximal and distal ends and at least one lumen extending therethrough. At least one electrode, such as a tip electrode or ring electrode, is mounted on the distal end of the catheter body, wherein the electrode comprises a base material having an outer surface and a hydrogel layer applied over at least a portion of the outer surface of the base material. Preferably a drug or other therapeutic agent is incorporated into the hydrogel layer.
Inventors
- 👤 Shahram Moaddeb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:18
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/06; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1492; A61B2018/00053; A61B2018/00107; A61B2018/00154
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
79 words
A catheter comprising: an elongated, flexible catheter body having proximal and distal ends and at least one lumen extending therethrough; and at least one electrode mounted on the distal end of the catheter body, wherein the electrode comprises an electrically-conductive base material having an outer surface with an electrically-conductive porous layer applied over at least a portion of the outer surface of the base material and a hydrogel layer applied over at least a portion of the porous layer.
Claim 2
Dependent Claim
79 words
A catheter comprising: an elongated, flexible catheter body having proximal and distal ends and at least one lumen extending therethrough; and at least one electrode mounted on the distal end of the catheter body, wherein the electrode comprises an electrically-conductive base material having an outer surface with an electrically-conductive porous layer applied over at least a portion of the outer surface of the base material and a hydrogel layer applied over at least a portion of the porous layer.
Claim 3
Dependent Claim
20 words
A catheter according to claim 1 , further comprising a drug or other therapeutic agent combined with the hydrogel layer.
Claim 4
Dependent Claim
17 words
A catheter according to claim 1 , further comprising an anti-inflammatory agent combined with the hydrogel layer.
Claim 5
Dependent Claim
14 words
A catheter according to claim 1 , wherein the electrode is a tip electrode.
Claim 6
Dependent Claim
20 words
A catheter according to claim 4 , wherein the tip electrode has a length of at least about 3 mm.
Claim 7
Dependent Claim
23 words
A catheter according to claim 4 , wherein the tip electrode has a length ranging from about 3 mm to about 6 mm.
Claim 8
Dependent Claim
51 words
A catheter according to claim 1 , further comprising a ring electrode mounted on the distal end of the catheter body, wherein the ring electrode comprises a base material having an outer surface and a hydrogel layer applied over at least a portion of the outer surface of the base material.
Claim 9
Dependent Claim
23 words
A catheter according to claim 1 , wherein the hydrogel layer has a thickness ranging from about 10 μm to about 300 μm.
Claim 10
Dependent Claim
35 words
A catheter according to claim 1 , wherein the porous layer comprises a material selected from the group consisting of metal nitride, metal oxide, metal carbide, metal carbonitride, carbon, carboxy nitride, and any combination thereof.
Claim 11
Dependent Claim
17 words
A catheter according to claim 9 , wherein the porous layer comprises titanium nitride or iridium oxide.
Claim 12
Dependent Claim
14 words
A catheter according to claim 1 , wherein the hydrogel layer comprises a protein.
Claim 13
Dependent Claim
21 words
A method according to claim 11 , wherein the protein is selected from the group consisting of albumin, collagen and gelatin.
Claim 14
Dependent Claim
23 words
A catheter according to claim 1 , wherein the porous layer has a thickness ranging from about 1 micron to about 50 microns.
Claim 15
Dependent Claim
16 words
A catheter according to claim 1 having a useful length of at least about 100 cm.
Claim 16
Dependent Claim
95 words
An ablation system comprising: a catheter comprising: an elongated, flexible catheter body having proximal and distal ends and at least one lumen extending therethrough, and at least one electrode mounted on the distal end of the catheter body, wherein the electrode comprises an electrically-conductive base material having an outer surface with an electrically-conductive porous layer applied over at least a portion of the outer surface of the base material and a hydrogel layer applied over at least a portion of the porous layer; and a source of radio frequency energy electrically connected to the electrode.
Claim 17
Dependent Claim
95 words
An ablation system comprising: a catheter comprising: an elongated, flexible catheter body having proximal and distal ends and at least one lumen extending therethrough, and at least one electrode mounted on the distal end of the catheter body, wherein the electrode comprises an electrically-conductive base material having an outer surface with an electrically-conductive porous layer applied over at least a portion of the outer surface of the base material and a hydrogel layer applied over at least a portion of the porous layer; and a source of radio frequency energy electrically connected to the electrode.
Claim 18
Dependent Claim
23 words
A system according to claim 24 , wherein the protein comprises a material selected from the group consisting of albumin, collagen and gelatin.
Claim 19
Dependent Claim
20 words
A system according to claim 15 , further comprising a drug or other therapeutic agent combined with the hydrogel layer.
Claim 20
Dependent Claim
17 words
A system according to claim 15 , further comprising an anti-inflammatory agent combined with the hydrogel layer.
Claim 21
Dependent Claim
14 words
A system according to claim 15 , wherein the electrode is a tip electrode.
Claim 22
Dependent Claim
23 words
A system according to claim 15 , wherein the hydrogel layer has a thickness ranging from about 10 μm to about 300 μm.
Claim 23
Dependent Claim
35 words
A system according to claim 15 , wherein the porous layer comprises a material selected from the group consisting of metal nitride, metal oxide, metal carbide, metal carbonitride, carbon, carboxy nitride, or a combination thereof.
Claim 24
Dependent Claim
17 words
A system according to claim 21 , wherein the porous layer comprises titanium nitride or iridium oxide.
Claim 25
Dependent Claim
14 words
A catheter according to claim 15 , wherein the porous layer is electrically conductive.
Claim 26
Dependent Claim
14 words
A catheter according to claim 15 , wherein the hydrogel layer comprises a protein.
Claim 27
Dependent Claim
23 words
A catheter according to claim 15 , wherein the porous layer has a thickness ranging from about 1 micron to about 50 microns.
Claim 28
Dependent Claim
16 words
A catheter according to claim 15 having a useful length of at least about 100 cm.
Claim 29
Dependent Claim
49 words
A method for ablating tissue in a patient, comprising: introducing the distal end of a catheter as recited in claim 1 into the patient so that the electrode is in contact with the tissue to be ablated; and applying energy to electrode, thereby creating a lesion in the tissue.
Claim 30
Dependent Claim
20 words
A catheter according to claim 27 , further comprising a drug or other therapeutic agent combined with the hydrogel layer.
Claim 31
Dependent Claim
17 words
A catheter according to claim 27 , further comprising an anti-inflammatory agent combined with the hydrogel layer.
Claim 32
Dependent Claim
14 words
A catheter according to claim 27 , wherein the electrode is a tip electrode.
Claim 33
Dependent Claim
23 words
A catheter according to claim 27 , wherein the hydrogel layer has a thickness ranging from about 10 μm to about 300 μm.
Claim 34
Dependent Claim
35 words
A method according to claim 27 , wherein the porous layer comprises a material selected from the group consisting of metal nitride, metal oxide, metal carbide, metal carbonitride, carbon, carboxy nitride, or a combination thereof.
Claim 35
Dependent Claim
17 words
A method according to claim 32 , wherein the porous layer comprises titanium nitride or iridium oxide.
Claim 36
Dependent Claim
14 words
A catheter according to claim 27 , wherein the hydrogel layer comprises a protein.
Claim 37
Dependent Claim
21 words
A system according to claim 34 , wherein the protein is selected from the group consisting of albumin, collagen and gelatin.
Claim 38
Dependent Claim
23 words
A catheter according to claim 27 , wherein the porous layer has a thickness ranging from about 1 micron to about 50 microns.
Claim 39
Dependent Claim
16 words
A catheter according to claim 27 having a useful length of at least about 100 cm.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2006-12-29 | 2007-06-30 | 2007-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-12-29 | 2011-06-30 | 2011-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-12-29 | 2015-06-30 | 2015-12-30 | $7700.00 | Window Closed / Lapsed |