Patent FR520721A successfully refreshed from Google Patents.
Patent US2412851A successfully refreshed from Google Patents.
US5876340A
Expired / Lapsed
US
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Ablation apparatus with ultrasonic imaging capabilities
Assignee: Irvine Biomedical Inc
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Filing: 1997-04-17
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Granted: 1999-03-02
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Expires: 2017-04-17
Abstract
Abstract An RF ablation apparatus has a delivery catheter with distal and proximal ends. A handle is attached to the proximal end of the delivery catheter. The delivery catheter has an electrode deployment means where said electrode deployment means includes a retractable tip section comprising a deployable electrode with portion of one side having a sharp edge. The tip section has a non-deployed state when it is positioned in the delivery catheter. On the other hand, the tip section has a distended deployed state when it is advanced out of the distal end of said delivery catheter. The deployed tip section has a preformed shape while the farther distal deployed electrode defines an ablation target along with portion of the forward side having a sharp edge on said electrode. The forward edge of the deployed electrode has a slightly curvature or an essentially straight shape. Said deployable electrode has ultrasonic imaging capabilities.
Inventors
- 👤 Hosheng Tu
- 👤 Weng-Kwen Raymond Chia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:05
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1492; A61B18/18; A61B18/1815; A61B2018/00315; A61B2018/00345; A61B2018/00404; A61B2018/00636; A61B2018/00773; A61B2018/00791; A61B2018/0091; A61B2018/1405; A61B2018/1412; A61B90/00; A61B90/36; A61B90/37; A61B2090/378; A61B2090/3782; A61B90/39; A61B2090/3925
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
160 words
An ablation apparatus comprising: (a) a delivery catheter with a distal section, a distal end, a proximal end, and a lumen extending therebetween, wherein a wire having a distal end and a proximal end is located within the lumen of the delivery catheter; (b) a handle attached to the proximal end of said delivery catheter, wherein a push-pull mechanism is located within the handle, and wherein the proximal end of the wire is attached to the push-pull mechanism; (c) an electrode deployment means positioned at the proximal end of the wire, wherein the wire comprises a retractable tip section; the catheter, handle, wire, and deployment means being adapted to cooperate to house non-deploy and deploy the tip section; (d) an electrode mounted on the retractable tip section, wherein the electrode has a front side adapted to contact the tissue when the retractable tip section is deployed; and (e) ultrasonically visible markers mounted on the distal catheter tip on the electrode.
Claim 2
Dependent Claim
160 words
An ablation apparatus comprising: (a) a delivery catheter with a distal section, a distal end, a proximal end, and a lumen extending therebetween, wherein a wire having a distal end and a proximal end is located within the lumen of the delivery catheter; (b) a handle attached to the proximal end of said delivery catheter, wherein a push-pull mechanism is located within the handle, and wherein the proximal end of the wire is attached to the push-pull mechanism; (c) an electrode deployment means positioned at the proximal end of the wire, wherein the wire comprises a retractable tip section; the catheter, handle, wire, and deployment means being adapted to cooperate to house non-deploy and deploy the tip section; (d) an electrode mounted on the retractable tip section, wherein the electrode has a front side adapted to contact the tissue when the retractable tip section is deployed; and (e) ultrasonically visible markers mounted on the distal catheter tip on the electrode.
Claim 3
Dependent Claim
34 words
The ablation apparatus as in claim 1, further comprising a preformed shape for the retractable tip section, wherein the tip section extends outwardly to one side of the delivery catheter when it is deployed.
Claim 4
Dependent Claim
43 words
The ablation apparatus as in claim 2, further comprising a torsion spring for the at least one electrode mounted on the retractable tip section, wherein the electrode bends inwardly to the opposite side of the delivery catheter with respect to the tip section.
Claim 5
Dependent Claim
21 words
The ablation apparatus of claim 3, wherein a portion of the front side of the electrode has an essentially straight edge.
Claim 6
Dependent Claim
27 words
The ablation apparatus as in claim 3, further comprising a steering mechanism at the handle for controlling the deflection of the distal section of said delivery catheter.
Claim 7
Dependent Claim
18 words
The ablation apparatus of claim 5, wherein the front side of the electrode has a slightly circular shape.
Claim 8
Dependent Claim
19 words
The ablation apparatus of claim 5, wherein the front side of the electrode has sections with plurality of curvatures.
Claim 9
Dependent Claim
36 words
The ablation apparatus as in claim 5, further comprising a temperature sensor mounted on the electrode and a closed-loop temperature controller, wherein the temperature sensor provides sensing signals for the closed-loop controller for the ablation apparatus.
Claim 10
Dependent Claim
38 words
The ablation apparatus of claim 3, wherein the electrode is consisted of blunt sides except a portion of the front side has a sharp edge wherein said sharp edge comprises a conductive surface adapted for RF energy delivery.
Claim 11
Dependent Claim
44 words
The ablation apparatus as in claim 3, further comprising ultrasonic probes on the front side of the electrode having ultrasonic signals being directed outwardly and received inwardly relative to the probes which are adapted to advance along with the front side of said electrode.
Claim 12
Dependent Claim
17 words
The ablation apparatus of claim 5, wherein the front side of the electrode has a sharp edge.
Claim 13
Independent Claim
295 words
A method for operating an ablation apparatus system inside the body of a patient for ablating a target tissue, the ablation apparatus system comprising a delivery catheter with a distal section, a distal end, a proximal end, and a lumen extending therebetween, wherein a wire having a distal end and a proximal end is located within the lumen of the delivery catheter; a handle attached to the proximal end of said delivery catheter, wherein a push-pull mechanism is located within the handle, and wherein the proximal end of the wire is attached to the push-pull mechanism; an electrode deployment means positioned at the proximal end of the wire, wherein the wire comprises a retractable tip section; the catheter, handle, wire, and deployment means being adapted to cooperate to house non-deploy and deploy the tip section; an electrode mounted on the retractable tip section, wherein the electrode has a front side adapted to contact the tissue when the retractable tip section is deployed; ultrasonically visible markers mounted on the distal catheter tip on the electrode, and an external RF generator, wherein RF is applied by the catheter electrode for ablation purposes; the method comprising: (a) introducing the delivery catheter having a retractable tip section under a non-deployed state into the body through a small surgery hole or through the natural body openings; (b) once approaching the target tissue, deploying the tip section by operating the push-pull mechanism at the handle; (c) moving the electrode to the proximity of the target tissue guided by the ultrasonically visible markers; (d) once positioned at the target tissue, encircling the target tissue; and (e) by a simultaneous or alternate mode, gradually pushing forward the delivery catheter against the target tissue and applying RF by the catheter electrode to the tissue.
Claim 14
Independent Claim
295 words
A method for operating an ablation apparatus system inside the body of a patient for ablating a target tissue, the ablation apparatus system comprising a delivery catheter with a distal section, a distal end, a proximal end, and a lumen extending therebetween, wherein a wire having a distal end and a proximal end is located within the lumen of the delivery catheter; a handle attached to the proximal end of said delivery catheter, wherein a push-pull mechanism is located within the handle, and wherein the proximal end of the wire is attached to the push-pull mechanism; an electrode deployment means positioned at the proximal end of the wire, wherein the wire comprises a retractable tip section; the catheter, handle, wire, and deployment means being adapted to cooperate to house non-deploy and deploy the tip section; an electrode mounted on the retractable tip section, wherein the electrode has a front side adapted to contact the tissue when the retractable tip section is deployed; ultrasonically visible markers mounted on the distal catheter tip on the electrode, and an external RF generator, wherein RF is applied by the catheter electrode for ablation purposes; the method comprising: (a) introducing the delivery catheter having a retractable tip section under a non-deployed state into the body through a small surgery hole or through the natural body openings; (b) once approaching the target tissue, deploying the tip section by operating the push-pull mechanism at the handle; (c) moving the electrode to the proximity of the target tissue guided by the ultrasonically visible markers; (d) once positioned at the target tissue, encircling the target tissue; and (e) by a simultaneous or alternate mode, gradually pushing forward the delivery catheter against the target tissue and applying RF by the catheter electrode to the tissue.
Claim 15
Dependent Claim
61 words
The method for operating an ablation apparatus system inside the body of a patient for ablating a target tissue as in claim 12, further comprising treating body tissue selecting from removal of prostatic adenomas, bladder tumors, uterus tumors, urethra tumors, and intestinal polyps by loosening the tissue and applying RF energy in a simultaneous mode, alternate mode, or a combination thereof.
Claim 16
Dependent Claim
193 words
An ablation apparatus comprising: (a) a delivery catheter with a distal section, a distal end, a proximal end, and a lumen extending therebetween, wherein a wire having a distal end and a proximal end is located within the lumen of the delivery catheter; (b) a handle attached to the proximal end of said delivery catheter, wherein a push-pull mechanism is located within the handle, and wherein the proximal end of the wire is attached to the push-pull mechanism; (c) an electrode deployment means positioned at the proximal end of the wire, wherein the wire comprises a retractable tip section; the catheter, handle, wire, and deployment means being adapted to cooperate to house non-deploy and deploy the tip section; (d) an electrode mounted on the retractable tip section, wherein the electrode has a front side adapted to contact the tissue when the retractable tip section is deployed, and wherein the electrode is consisted of blunt sides except a portion of the front side having a sharp edge to loosen the target tissue for improved ablation treatment with RF energy delivery; and (e) ultrasonically visible markers mounted on the distal catheter tip on the electrode.
Claim 17
Dependent Claim
193 words
An ablation apparatus comprising: (a) a delivery catheter with a distal section, a distal end, a proximal end, and a lumen extending therebetween, wherein a wire having a distal end and a proximal end is located within the lumen of the delivery catheter; (b) a handle attached to the proximal end of said delivery catheter, wherein a push-pull mechanism is located within the handle, and wherein the proximal end of the wire is attached to the push-pull mechanism; (c) an electrode deployment means positioned at the proximal end of the wire, wherein the wire comprises a retractable tip section; the catheter, handle, wire, and deployment means being adapted to cooperate to house non-deploy and deploy the tip section; (d) an electrode mounted on the retractable tip section, wherein the electrode has a front side adapted to contact the tissue when the retractable tip section is deployed, and wherein the electrode is consisted of blunt sides except a portion of the front side having a sharp edge to loosen the target tissue for improved ablation treatment with RF energy delivery; and (e) ultrasonically visible markers mounted on the distal catheter tip on the 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) | 2002-03-01 | 2002-08-31 | 2003-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-01 | 2006-08-31 | 2007-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-01 | 2010-08-31 | 2011-03-02 | $7700.00 | Window Closed / Lapsed |