Patent US5293868A successfully refreshed from Google Patents.
US5293868A
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Cardiac ablation catheter having resistive mapping electrodes
Assignee: AMERICAN CARDIAC ABLATION Co Inc A CORP OF
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Filing: 1992-06-30
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Granted: 1994-03-15
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Expires: 2012-06-30
Abstract
Abstract A cardiac ablation catheter includes a distal, energy delivering electrode and at least one sensing electrode proximal to the energy delivering electrode. The catheter communicates with an electrosurgical generator which provides electrical energy, such as a radio frequency energy, to the distal electrode. The sensing electrodes communicate with a monitor for recording electrical signals within the heart. One or more resistors is positioned adjacent each sensing electrode, and in series with a conductor associated with the sensing electrode, to reduce or eliminate any current tending to be emitted through the sensing electrodes as a result of delivery of electrical current through the distal electrode.
Inventors
- 👤 Paul C. Nardella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:42
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/06; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1492; A61B5/00; A61B5/24; A61B5/25; A61B5/279; A61B5/28; A61B5/283; A61B5/287; A61B18/1206; A61B18/1233; A61B17/00; A61B17/00234; A61B2017/00292; A61B2562/00; A61B2562/02; A61B2562/0209; A61B2562/0215; A61B2562/04; A61B2562/043
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
115 words
A catheter device for deployment within or adjacent to an internal organ, comprising: a thin, elongate, flexible member having distal and proximal ends; an energy delivering ablation electrode positioned on the member; an electrical conductor for communicating ablating energy from a generator source to the energy delivering ablation electrode; at least one sensing electrode disposed on the member; an electrical conductor communicating with each sensing electrode; and resistor means for reducing the density of electrical current exiting each sensing electrode upon delivery of ablating energy through the ablation electrode to adjacent tissue, the resistor means being disposed adjacent to each sensing electrode at a terminal end of the electrical conductor associated with each sensing electrode.
Claim 2
Dependent Claim
115 words
A catheter device for deployment within or adjacent to an internal organ, comprising: a thin, elongate, flexible member having distal and proximal ends; an energy delivering ablation electrode positioned on the member; an electrical conductor for communicating ablating energy from a generator source to the energy delivering ablation electrode; at least one sensing electrode disposed on the member; an electrical conductor communicating with each sensing electrode; and resistor means for reducing the density of electrical current exiting each sensing electrode upon delivery of ablating energy through the ablation electrode to adjacent tissue, the resistor means being disposed adjacent to each sensing electrode at a terminal end of the electrical conductor associated with each sensing electrode.
Claim 3
Dependent Claim
29 words
The device of claim 1, wherein said means for reducing the density of electrical current is electrically connected in series with the sensing electrodes and the associated electrical conductors.
Claim 4
Dependent Claim
25 words
The device of claim 2, wherein the means for reducing the density of electrical current has nominal resistive values of about 500 to 1300 ohms.
Claim 5
Dependent Claim
29 words
The device of claim 3, wherein the means for reducing the density of electrical current is selected from the group consisting of thin-film, wire-wound, resistive wire and ceramic resistors.
Claim 6
Dependent Claim
18 words
The device of claim 1 wherein the means for reducing the density of electrical current is an inductor.
Claim 7
Dependent Claim
13 words
The device of claim 1, wherein the catheter is a cardiac ablation catheter.
Claim 8
Dependent Claim
19 words
The device of claim 1 wherein the energy delivering electrode is mounted on the distal end of the member.
Claim 9
Dependent Claim
17 words
The device of claim 6 wherein the sensing electrode is disposed proximally to the energy delivering electrode.
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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) | 1997-03-14 | 1997-09-13 | 1998-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-14 | 2001-09-13 | 2002-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-14 | 2005-09-13 | 2006-03-15 | $7700.00 | Window Closed / Lapsed |