US5231995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for catheter mapping and ablation
Assignee: Catheffects Inc
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Filing: 1992-09-30
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Granted: 1993-08-03
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Expires: 2012-09-30
Abstract
Abstract A multipolar electrode catheter includes a central and four side electrodes at its distal end. The catheter is actuable from a retracted or collapsed mode wherein the side electrodes are arranged around the tubular catheter outer surface to an expanded mode. A plurality of longitudinal slits in the catheter wall enable radial expansion of the distal end so that the side electrodes are moved to an operative position radially outward from their position in the retracted mode. In the expanded position, the side electrodes lie in the same plane and equally spaced from adjacent electrodes. Electrode leads connected to the electrodes enable the electrodes to be used both for mapping and ablation of endocardial sites.
Inventors
- 👤 Jawahar M. Desai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:39
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N1/056; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1492; A61B2018/00053; A61B2018/00214; A61B5/00; A61B5/24; A61B5/25; A61B5/279; A61B5/28; A61B5/283; A61B5/287
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
138 words
A method of mapping patient sites so as to locate and ablate a foci using a multipolar electrode catheter having a distal end and an opposite, proximal end, a plurality of electrodes mounted adjacent said distal end, each of said electrodes mounted on an expandable limb which is movable from a retracted to an expanded position, comprising the steps of: (a) positioning the distal end of said catheter against a site; (b) deploying said catheter limbs to their expanded position; (c) positioning said distal end so that said electrodes are in contacting relation with said site; (d) recording different combinations of two of said electrodes; (e) re-positioning said distal end in contact with another site; and (f) repeating steps (c) through (e) until the earliest site with respect to a reference point is determined, thereby locating the foci.
Claim 2
Independent Claim
138 words
A method of mapping patient sites so as to locate and ablate a foci using a multipolar electrode catheter having a distal end and an opposite, proximal end, a plurality of electrodes mounted adjacent said distal end, each of said electrodes mounted on an expandable limb which is movable from a retracted to an expanded position, comprising the steps of: (a) positioning the distal end of said catheter against a site; (b) deploying said catheter limbs to their expanded position; (c) positioning said distal end so that said electrodes are in contacting relation with said site; (d) recording different combinations of two of said electrodes; (e) re-positioning said distal end in contact with another site; and (f) repeating steps (c) through (e) until the earliest site with respect to a reference point is determined, thereby locating the foci.
Claim 3
Dependent Claim
21 words
The method of claim 1, further including the step of discharging energy through said electrodes so as to ablate the foci.
Claim 4
Dependent Claim
31 words
The method of claim 2, further including the step of contracting said limbs to their retracted position prior to repositioning said distal end and redeploying said limbs after reaching another site.
Claim 5
Dependent Claim
37 words
The method of claim 2 further including the steps of: (a) applying an electrical stimulus to the site through said electrodes; (b) collapsing said limbs; and (c) removing said catheter from said site if no dysrhythmia occurs.
Claim 6
Dependent Claim
19 words
The method of claim 2 wherein the energy is electrical energy within the range of 25 to 300 Joules.
Claim 7
Dependent Claim
30 words
The method of claim 2 further including a contact surface, and wherein said step of discharging includes passing energy from said electrodes to said contact surface through said earliest site.
Claim 8
Dependent Claim
28 words
The method of claim 2 wherein said step of discharging includes passing energy from at least one of said electrodes to at least one other of said electrodes.
Claim 9
Dependent Claim
40 words
The method of claim 1 wherein the site to be mapped is divided into four quadrants, and wherein the steps (a) through (f) are performed in the first quadrant, and moving to a second quadrant if no foci is located.
Claim 10
Dependent Claim
25 words
The method of claim 8 repeating steps (a) through (f) in the second quadrant and moving to a third quadrant if no foci are located.
Claim 11
Dependent Claim
36 words
The method of claim 9, repeating steps (a) through (f) in the third quadrant and moving to a fourth quadrant if no foci are located, and repeating the steps (a) through (f) in the fourth quadrant.
References Cited (Backward Citations)
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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) | 1996-08-02 | 1997-02-01 | 1997-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-02 | 2001-02-01 | 2001-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-02 | 2005-02-01 | 2005-08-03 | $7700.00 | Window Closed / Lapsed |