US5941845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter having multiple-needle electrode and methods thereof
Assignee: Irvine Biomedical Inc
•
Filing: 1997-08-05
•
Granted: 1999-08-24
•
Expires: 2017-08-05
Abstract
Abstract An improved ablation catheter with at least one multiple-needle electrode can be used in ablating the arrhythmogenic region instead of an arrhythmogenic point of a patient. This catheter is particularly useful for treating the patient with atrial fibrillation (AFib) indications. A catheter suitable for radiofrequency ablation of cardiac tissues comprises a delivery catheter and an inner catheter having a distal section, a distal end, a proximal end and at least one lumen extending therebetween. The ablation catheter has a temperature sensor and a close-loop temperature control. The steerable catheter having at least one multiple-needle electrode is inserted into the chambers of the heart to create a plurality of deep, large, and contiguous lesions by applying radiofrequency energy to said electrode.
Inventors
- 👤 Hosheng Tu
- 👤 Weng-Kwen Raymond Chia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:24
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/08; A61B18/12; A61B18/14; A61B18/1492; A61B18/1477; A61B17/00; A61B17/00234; A61B2017/00292; A61B2017/003; A61B2018/00005; A61B2018/00011; A61B2018/00029; A61B2018/00053; A61B2018/00107; A61B2018/00136; A61B2018/00154; A61B2018/00315; A61B2018/00345; A61B2018/00351; A61B2018/00571; A61B2018/00577; A61B2018/00636; A61B2018/00696; A61B2018/00744; A61B2018/00773; A61B2018/00791; A61B2018/00797; A61B2018/00815; A61B2018/00839; A61B2018/0091; A61B2018/1405; A61B2018/1425; A61B2018/143; A61B2018/1432; A61B2018/1467; A61B90/00; A61B90/36; A61B90/37; A61B2090/378; A61B2090/3782; A61B90/39; A61B2090/3925; A61B2218/00; A61B2218/001; A61B2218/002; A61M; A61M25/00; A61M25/0067; A61M25/0082; A61M2025/0096
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
126 words
A method for operating a steerable ablation catheter within a heart chamber, the steerable ablation catheter having a deployable inner catheter and having an additional multiple-needle electrode at the tip section of the inner catheter, wherein the multiple-needle electrode has a longitudinal length of 4 mm or longer; the method comprising the steps of: (a) percutaneously introducing the steerable ablation catheter through a blood vessel to the heart chamber, wherein the multiple-needle electrode is deployed by advancing the inner catheter forward; (b) deflecting a distal section of the inner catheter about a transverse axis to position the multiple-needle electrode near a target on an interior wall of the heart chamber; (c) intimately contacting the electrode with an intracardiac tissue; and (d) applying RF energy for ablation.
Claim 2
Independent Claim
126 words
A method for operating a steerable ablation catheter within a heart chamber, the steerable ablation catheter having a deployable inner catheter and having an additional multiple-needle electrode at the tip section of the inner catheter, wherein the multiple-needle electrode has a longitudinal length of 4 mm or longer; the method comprising the steps of: (a) percutaneously introducing the steerable ablation catheter through a blood vessel to the heart chamber, wherein the multiple-needle electrode is deployed by advancing the inner catheter forward; (b) deflecting a distal section of the inner catheter about a transverse axis to position the multiple-needle electrode near a target on an interior wall of the heart chamber; (c) intimately contacting the electrode with an intracardiac tissue; and (d) applying RF energy for ablation.
Claim 3
Dependent Claim
27 words
A method for operating an ablation catheter as in claim 1, wherein a distance of the needles of said additional multiple-needle electrode is 2 mm or less.
References Cited (Backward Citations)
US5281218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-08-23 | 2003-02-22 | 2003-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-08-23 | 2007-02-22 | 2007-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-08-23 | 2011-02-22 | 2011-08-24 | $7700.00 | Window Closed / Lapsed |