US5893884A
Expired / Lapsed
US
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Catheter system having rollable electrode means
Assignee: Irvine Biomedical Inc
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Filing: 1997-12-23
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Granted: 1999-04-13
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Expires: 2017-12-23
Abstract
Abstract An improved catheter system, having at least one rollable electrode at its tip section, can be used in ablating the arrhythmogenic point of a patient. A catheter suitable for radiofrequency ablation of cardiac tissues comprises a catheter shaft having a distal section, a distal end, a proximal end, and at least one lumen extending therebetween, wherein at least a rollable electrode is disposed at the tip section of the said catheter. In one embodiment, the ablation catheter has a temperature sensor and a close-loop temperature control mechanism. In another embodiment, the ablation catheter has fluid infusion and irrigation means at its distal tip section for creating a deep and large lesion by applying radiofrequency energy and cooled fluid to the said electrode.
Inventors
- 👤 Hosheng Tu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:11
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1492; A61B17/00; A61B17/00234; A61B2017/00292; A61B2017/003; A61B2018/00053; A61B2018/00059; A61B2018/00065; A61B2018/00315; A61B2018/00345; A61B2018/00351; A61B2018/00571; A61B2018/00577; A61B2018/00636; A61B2018/00773; A61B2018/00791; A61B2018/00821; A61B2018/00839; A61B2018/1405; A61B2018/1417
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
67 words
A catheter system comprising: a catheter shaft having a distal tip section, a distal end, a proximal end, and at least one lumen extending therebetween, wherein the distal tip section has at least a hollow pocket; a handle attached to the proximal end of the catheter shaft; and at least a ball disposed inside the said hollow pocket, wherein said ball is comprised of a porous substrate.
Claim 2
Dependent Claim
67 words
A catheter system comprising: a catheter shaft having a distal tip section, a distal end, a proximal end, and at least one lumen extending therebetween, wherein the distal tip section has at least a hollow pocket; a handle attached to the proximal end of the catheter shaft; and at least a ball disposed inside the said hollow pocket, wherein said ball is comprised of a porous substrate.
Claim 3
Dependent Claim
28 words
The catheter system as in claim 1, further comprising at least a conducting wire disposed inside the lumen, wherein said conducting wire is to contact the porous ball.
Claim 4
Dependent Claim
33 words
The catheter system as in claim 2, further comprising fluid being supplied to the distal tip section of the catheter shaft and disposed out of the hollow pocket having a porous ball electrode.
Claim 5
Dependent Claim
23 words
The catheter system as in claim 3, wherein the fluid is selected from the group of saline, heparin, antibiotics, chemotherapy and therapeutics fluids.
Claim 6
Dependent Claim
28 words
The catheter system as in claim 1, further comprising a steering mechanism at the handle for controlling the deflection of the distal tip section of said catheter system.
Claim 7
Dependent Claim
28 words
The catheter system as in claim 3, wherein the at least one hollow pocket is located at a side of the distal tip section of the catheter shaft.
Claim 8
Dependent Claim
26 words
The catheter system as in claim 2, further comprising RF energy being delivered to said at least one ball electrode disposed at the distal tip section.
Claim 9
Dependent Claim
30 words
The catheter system as in claim 7, further comprising at least one temperature sensing means at the distal tip section and a close-loop temperature control mechanism for the catheter system.
Claim 10
Dependent Claim
47 words
The catheter system as in claim 8, further comprising a means for controlling the flow rate of fluid through the lumen to optimize cooling of the electrode of the catheter, wherein the control system preferably regulates the flow rate based on signals from the temperature sensing means.
Claim 11
Dependent Claim
28 words
The ablation catheter as in claim 7, further comprising the material of the electrode being selected from the group of platinum, iridium, gold, silver, stainless steel, and Nitinol.
Claim 12
Dependent Claim
80 words
A catheter system comprising: a catheter shaft having a distal tip section, a distal end, a proximal end, and at least one lumen extending therebetween, wherein the distal tip section has at least a stem supporting mechanism, and wherein the distal end has a fluid venting opening; a handle attached to the proximal end of the catheter shaft; and at least a rollable electrode disposed at the tip section, wherein said rollable electrode is secured by the stem supporting mechanism.
Claim 13
Dependent Claim
80 words
A catheter system comprising: a catheter shaft having a distal tip section, a distal end, a proximal end, and at least one lumen extending therebetween, wherein the distal tip section has at least a stem supporting mechanism, and wherein the distal end has a fluid venting opening; a handle attached to the proximal end of the catheter shaft; and at least a rollable electrode disposed at the tip section, wherein said rollable electrode is secured by the stem supporting mechanism.
Claim 14
Dependent Claim
29 words
The catheter system as in claim 11, further comprising fluid being supplied to the distal tip section of the catheter shaft and diffused out of the fluid venting opening.
Claim 15
Dependent Claim
23 words
The catheter system as in claim 12, wherein the fluid is selected from the group of saline, heparin, antibiotics, chemotherapy and therapeutics fluids.
Claim 16
Dependent Claim
34 words
The catheter system as in claim 11, further comprising a steering mechanism at the handle, wherein the steering mechanism provides at least one deflectable curve on the distal tip section of the catheter system.
Claim 17
Dependent Claim
29 words
The catheter system as in claim 11, wherein the at least one stem supporting mechanism is located at a side of the catheter shaft of the distal tip section.
Claim 18
Dependent Claim
26 words
The catheter system as in claim 12, further comprising RF energy being delivered to the at least one rollable electrode disposed at the distal tip section.
Claim 19
Dependent Claim
25 words
The catheter system as in claim 16, further comprising at least one temperature sensing means and a close-loop temperature control mechanism for the catheter system.
Claim 20
Dependent Claim
17 words
The catheter system as in claim 11, wherein the rollable electrode is constructed of a porous substrate.
Claim 21
Dependent Claim
26 words
The catheter system as in claim 11, further comprising the rollable electrode being selected from the group of roller electrode, wheel electrode, or circular saw electrode.
Claim 22
Independent Claim
97 words
A method for operating a catheter system having a distal tip section with a rollable electrode inside a hollow pocket, within a heart chamber, comprising: (a) percutaneously introducing the catheter system through a blood vessel to the heart chamber, wherein the distal tip section comprises a rollable electrode; (b) deflecting the distal tip section of the catheter shaft about a transverse axis to position the electrode near a target on an interior wall of the heart chamber; (c) intimately contacting the electrode with the intracardiac tissue; and (d) applying RF energy to the rollable electrode for ablation.
Claim 23
Independent Claim
97 words
A method for operating a catheter system having a distal tip section with a rollable electrode inside a hollow pocket, within a heart chamber, comprising: (a) percutaneously introducing the catheter system through a blood vessel to the heart chamber, wherein the distal tip section comprises a rollable electrode; (b) deflecting the distal tip section of the catheter shaft about a transverse axis to position the electrode near a target on an interior wall of the heart chamber; (c) intimately contacting the electrode with the intracardiac tissue; and (d) applying RF energy to the rollable electrode for ablation.
References Cited (Backward Citations)
US5242441A
Cited
US5643255A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-04-12 | 2002-10-12 | 2003-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-04-12 | 2006-10-12 | 2007-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-04-12 | 2010-10-12 | 2011-04-13 | $7700.00 | Window Closed / Lapsed |