US6405067B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter with tip electrode having a recessed ring electrode mounted thereon
Assignee: Biosense Webster Inc
•
Filing: 2000-07-07
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Granted: 2002-06-11
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Expires: 2020-07-07
Abstract
Abstract A catheter particularly suitable for bipolar mapping and ablating comprises an elongated flexible body having a distal region and at least one lumen extending therethrough. A tip electrode is mounted on the distal region. The tip electrode has an exposed distal region having an outer diameter, a recessed central region having an outer surface proximal to the exposed distal region, and a proximal region having an outer diameter and an outer surface proximal to the central region. The recessed central region has an outer diameter less than the outer diameters of the exposed distal region and the proximal region. The central region and the proximal region are provided with an electrically insulating and thermally conductive layer over at least a portion of their outer surfaces. A ring electrode is mounted on the recessed central region. The ring electrode has an outer diameter less than the outer diameters of the exposed distal region and the proximal region. With this design, the exposed region of the tip electrode is in direct contact with the heart tissue, and thus senses both the local activation energy (near-field signals) at the point of contact with the heart tissue and far field activation energy (far-field signals) received by the exposed region through the blood. However, the recessed electrode is protected from direct contact with the heart tissue, but does contact with surrounding blood. The close proximity of the recessed electrode to the exposed region enables the recessed electrode to receive approximately the same far-field signals as the exposed region. However, the recessed electrode does not pick up the local activation potential (near-field signals) that are received by the exposed region. This design permits the creation of high resolution electrograms.
Inventors
- 👤 Robert A. Mest
- 👤 Hiroshi Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:19
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1492; A61B2018/00053; A61B2018/00059; A61B2018/00071; A61B2018/00083; A61B2018/00089; A61B2018/00095; A61B2018/00636; A61B2018/00773; A61B2018/00839
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
150 words
A catheter comprising: an elongated flexible body having a distal region and at least one lumen extending therethrough; a tip electrode mounted on the distal region, the tip electrode having an exposed distal region having an outer diameter, a recessed central region having an outer surface proximal to the exposed distal region, and a proximal region having an outer diameter and an outer surface proximal to the central region, wherein the recessed central region has an outer diameter less than the outer diameters of the exposed distal region and the proximal region, and further wherein the central region and the proximal region are provided with an electrically insulating and thermally conductive layer over at least a portion of their outer surfaces; and a ring electrode mounted on the recessed central region and having an outer diameter less than the outer diameters of the exposed distal region and the proximal region.
Claim 2
Dependent Claim
150 words
A catheter comprising: an elongated flexible body having a distal region and at least one lumen extending therethrough; a tip electrode mounted on the distal region, the tip electrode having an exposed distal region having an outer diameter, a recessed central region having an outer surface proximal to the exposed distal region, and a proximal region having an outer diameter and an outer surface proximal to the central region, wherein the recessed central region has an outer diameter less than the outer diameters of the exposed distal region and the proximal region, and further wherein the central region and the proximal region are provided with an electrically insulating and thermally conductive layer over at least a portion of their outer surfaces; and a ring electrode mounted on the recessed central region and having an outer diameter less than the outer diameters of the exposed distal region and the proximal region.
Claim 3
Dependent Claim
24 words
A catheter as claimed in claim 1 , wherein the tip electrode has a length ranging from about 4 mm to about 12 mm.
Claim 4
Dependent Claim
24 words
A catheter as claimed in claim 1 , wherein the tip electrode has a length ranging from about 6 mm to about 10 mm.
Claim 5
Dependent Claim
25 words
A catheter as claimed in claim 1 , wherein the exposed distal region has a length ranging from about 1.5 mm to about 4.0 mm.
Claim 6
Dependent Claim
25 words
A catheter as claimed in claim 1 , wherein the exposed distal region has a length ranging from about 2 mm to about 3 mm.
Claim 7
Dependent Claim
21 words
A catheter as claimed in claim 1 , wherein the exposed region has a length approximately equal to its outer diameter.
Claim 8
Dependent Claim
36 words
A catheter as claimed in claim 1 , wherein the difference between the outer diameter of the central portion and the outer diameter of the exposed region ranges from about 0.25 mm to about 1.5 mm.
Claim 9
Dependent Claim
36 words
A catheter as claimed in claim 1 , wherein the difference between the outer diameter of the central portion and the outer diameter of the exposed region ranges from about 0.5 mm to about 1 mm.
Claim 10
Dependent Claim
36 words
A catheter as claimed in claim 1 , wherein the electrically insulating and thermally conductive layer comprises a composition selected from the group consisting of diamond, carbon, parylene, polyimide, polyester, polyurethane, epoxy, ceramic, and combinations thereof.
Claim 11
Dependent Claim
25 words
A catheter as claimed in claim 1 , wherein the electrically insulating and thermally conductive layer has a thickness no greater than about 10 μm.
Claim 12
Dependent Claim
28 words
A catheter as claimed in claim 1 , wherein the electrically insulating and thermally conductive layer has a thickness ranging from about 1 μm to about 5 μm.
Claim 13
Dependent Claim
194 words
A catheter comprising: an elongated flexible body having proximal and distal ends and at least one lumen extending therethrough; a tip section comprising a flexible tubing that is more flexible than the catheter body mounted at the distal end of the catheter body, the flexible tubing having proximal and distal ends and at least on lumen extending therethrough; a tip electrode mounted on the distal end of the flexible tubing, the tip electrode having an exposed distal region having an outer diameter, a recessed central region having an outer surface proximal to the exposed distal region, and a proximal region having an outer diameter and an outer surface proximal to the central region, wherein the recessed central region has an outer diameter less than the outer diameters of the exposed distal region and the proximal region, and further wherein the central region and the proximal region are provided with an electrically insulating and thermally conductive layer over at least a portion of their outer surfaces; and a ring electrode mounted on the recessed central region and having an outer diameter less than the outer diameters of the exposed distal region and the proximal region.
Claim 14
Dependent Claim
194 words
A catheter comprising: an elongated flexible body having proximal and distal ends and at least one lumen extending therethrough; a tip section comprising a flexible tubing that is more flexible than the catheter body mounted at the distal end of the catheter body, the flexible tubing having proximal and distal ends and at least on lumen extending therethrough; a tip electrode mounted on the distal end of the flexible tubing, the tip electrode having an exposed distal region having an outer diameter, a recessed central region having an outer surface proximal to the exposed distal region, and a proximal region having an outer diameter and an outer surface proximal to the central region, wherein the recessed central region has an outer diameter less than the outer diameters of the exposed distal region and the proximal region, and further wherein the central region and the proximal region are provided with an electrically insulating and thermally conductive layer over at least a portion of their outer surfaces; and a ring electrode mounted on the recessed central region and having an outer diameter less than the outer diameters of the exposed distal region and the proximal region.
Claim 15
Dependent Claim
24 words
A catheter as claimed in claim 12 , wherein the tip electrode has a length ranging from about 4 mm to about 12 mm.
Claim 16
Dependent Claim
24 words
A catheter as claimed in claim 12 , wherein the tip electrode has a length ranging from about 6 mm to about 10 mm.
Claim 17
Dependent Claim
35 words
A catheter as claimed in claim 12 , wherein the electrically insulating and thermally conductive layer comprises a composition selected from the group consisting of diamond, carbine, polyimide, polyester, polyurethane, epoxy, ceramic, and combinations thereof.
Claim 18
Dependent Claim
25 words
A catheter as claimed in claim 12 , wherein the electrically insulating and thermally conductive layer has a thickness no greater than about 10 μm.
Claim 19
Dependent Claim
28 words
A catheter as claimed in claim 12 , wherein the electrically insulating and thermally conductive layer has a thickness ranging from about 1 μm to about 5 μm.
Claim 20
Dependent Claim
21 words
A catheter as claimed in claim 12 , wherein the exposed region has a length approximately equal to its outer diameter.
Claim 21
Dependent Claim
25 words
A catheter as claimed in claim 12 , wherein the exposed distal region has a length ranging from about 1.5 mm to about 4.0 mm.
Claim 22
Dependent Claim
25 words
A catheter as claimed in claim 12 , wherein the exposed distal region has a length ranging from about 2 mm to about 3 mm.
Claim 23
Dependent Claim
36 words
A catheter as claimed in claim 12 , wherein the difference between the outer diameter of the central portion and the outer diameter of the exposed region ranges from about 0.25 mm to about 1.5 mm.
Claim 24
Dependent Claim
36 words
A catheter as claimed in claim 12 , wherein the difference between the outer diameter of the central portion and the outer diameter of the exposed region ranges from about 0.5 mm to about 1 mm.
Claim 25
Dependent Claim
24 words
A catheter as claimed in claim 12 , further comprising at least one ring electrode mounted on the distal end of the flexible tubing.
Claim 26
Dependent Claim
16 words
A catheter as claimed in claim 12 , further comprising means for deflecting the tip section.
Claim 27
Dependent Claim
22 words
A catheter as claimed in claim 12 , further comprising a location sensor mounted, at least in part, in the tip electrode.
References Cited (Backward Citations)
US4444195A
Cited
US4481953A
Cited
US4966597A
Cited
US5230349A
Cited
US5749914A
Cited
US5179952A
Cited
US5085659A
Cited
US5315996A
Cited
US5398683A
Cited
US5383922A
Cited
US5462544A
Cited
US5520684A
Cited
US5810802A
Cited
US5967976A
Cited
US5971980A
Cited
US5782760A
Cited
US5891027A
Cited
US6001095A
Cited
US6024739A
Cited
US5919222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-06-10 | 2005-12-10 | 2006-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-06-10 | 2009-12-10 | 2010-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-06-10 | 2013-12-10 | 2014-06-11 | $7700.00 | Window Closed / Lapsed |