US5779715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead extraction system and methods thereof
Assignee: Irvine Biomedical Inc
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Filing: 1997-07-28
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Granted: 1998-07-14
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Expires: 2017-07-28
Abstract
Abstract An improved lead extraction system having multiple-jaw cutting edge that is useful for extraction and removal of unwanted lead by a minimal invasive procedure. A lead extraction system suitable for radiofrequency ablation of scar tissues surrounding the implanted lead comprises a catheter sheath having a distal end, a proximal end and at least one lumen extending therebetween, wherein a locking stylet is provided. In one embodiment, the lead extraction system has fluid infusion and irrigation means at its distal tip section and a set of ablation electrodes for loosening the target tissue by applying radiofrequency energy and cooled fluid to said electrode and its contacted tissue.
Inventors
- 👤 Hosheng Tu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:32
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N1/056; A61N1/057; A61B; A61B17/00; A61B17/50; A61N1/40; A61N1/403; A61B17/22; A61B17/22031; A61B2017/22035; A61N2001/0578
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
70 words
A lead extraction system comprising: a catheter sheath having a distal tip section, a distal end, a proximal end, and at least one lumen extending therebetween; a handle attached to the proximal end of the catheter sheath; a locking stylet located within the lumen of said catheter sheath; and an electrode deployment means including a retractable tip section, comprising a set of deployable jaw electrodes each having a sharp end.
Claim 2
Dependent Claim
70 words
A lead extraction system comprising: a catheter sheath having a distal tip section, a distal end, a proximal end, and at least one lumen extending therebetween; a handle attached to the proximal end of the catheter sheath; a locking stylet located within the lumen of said catheter sheath; and an electrode deployment means including a retractable tip section, comprising a set of deployable jaw electrodes each having a sharp end.
Claim 3
Dependent Claim
19 words
The lead extraction system as in claim 1, further comprising RF energy is delivered to the deployable jaw electrodes.
Claim 4
Dependent Claim
38 words
The lead extraction system as in claim 2, further comprising fluid being supplied to the distal tip section of the catheter sheath and disposed out of the hollow opening at the distal end of the multiple-jaw electrodes means.
Claim 5
Dependent Claim
24 words
The lead extraction system as in claim 3, further comprising fluid being selected from the group of saline, heparin, antibiotics, chemotherapy and therapeutics fluids.
Claim 6
Dependent Claim
57 words
The lead extraction system as in claim 4, further comprising a method and system for controlling the flow rate of fluid through the lumen to optimize the cooling of the electrode of the catheter, wherein the control system preferably regulates the flow rate based on signals representative of the temperature of the catheter tip and/or tissue impedance.
Claim 7
Dependent Claim
79 words
The lead extraction system as in claim 2, further comprising an electrode deployment means positioned at the distal end of said catheter sheath, wherein said electrode deployment means including a retractable tip section, comprising a non-deployed state for said retractable tip section when said tip section being positioned in the catheter sheath, and further comprising a distended deployed state for said retractable tip section when said tip section being advanced out of the distal end of said catheter sheath.
Claim 8
Dependent Claim
42 words
The lead extraction system as in claim 6, further comprising a preformed shape for said deployed tip section, whereby a set of multiple jaw electrodes on said tip section extending outwardly to each respective side of said catheter sheath when being deployed.
Claim 9
Dependent Claim
21 words
The lead extraction system as in claim 2, further comprising at least one deployable jaw electrode having a sharp side edge.
Claim 10
Dependent Claim
29 words
The lead extraction system as in claim 2, further comprising at least one deployable jaw electrode having a sharp end, wherein said sharp end comprises plurality of sharp points.
Claim 11
Dependent Claim
27 words
The lead extraction system as in claim 2, further comprising at least one temperature sensing means and a close-loop temperature control mechanism for the lead extraction system.
Claim 12
Dependent Claim
23 words
The lead extraction system as in claim 2, further comprising at least one ultrasonic visible marker being disposed at the distal tip section.
Claim 13
Dependent Claim
29 words
The lead extraction system as in claim 2, further comprising the material of the electrode being selected from the group of platinum, iridium, gold, silver, stainless steel, and Nitinol.
Claim 14
Independent Claim
95 words
A method for operating a lead extraction system having a distal tip section under a non-deployed state, into the body, comprising: (a) sliding the system over an existing lead wire; (b) using the ultrasonic viewing markers to locate the target tissue; (c) intimately contacting the distal end of the catheter sheath with the target tissue; (d) deploying the multiple-jaw electrodes means; (e) applying RF energy to the electrodes while cutting through the tissue; (f) engaging the locking stylet onto the lead wire; and (g) extracting the lead by pulling the system out of a patient.
Claim 15
Independent Claim
95 words
A method for operating a lead extraction system having a distal tip section under a non-deployed state, into the body, comprising: (a) sliding the system over an existing lead wire; (b) using the ultrasonic viewing markers to locate the target tissue; (c) intimately contacting the distal end of the catheter sheath with the target tissue; (d) deploying the multiple-jaw electrodes means; (e) applying RF energy to the electrodes while cutting through the tissue; (f) engaging the locking stylet onto the lead wire; and (g) extracting the lead by pulling the system out of a patient.
Claim 16
Dependent Claim
32 words
The method for operating the lead extraction system as in claim 13, further comprising fluid being supplied to the distal tip section of the catheter sheath and disposed out of the opening.
Claim 17
Dependent Claim
81 words
A lead extraction application using a lead extraction system comprising: a catheter sheath having a distal tip section, a distal end, a proximal end, and at least one lumen extending therebetween; a handle attached to the proximal end of the catheter sheath; a locking stylet located within the lumen of said catheter sheath; an electrode deployment means including a retractable tip section, comprising a set of deployable jaw electrodes each having a sharp end; and applying RF energy to said electrodes.
Claim 18
Dependent Claim
81 words
A lead extraction application using a lead extraction system comprising: a catheter sheath having a distal tip section, a distal end, a proximal end, and at least one lumen extending therebetween; a handle attached to the proximal end of the catheter sheath; a locking stylet located within the lumen of said catheter sheath; an electrode deployment means including a retractable tip section, comprising a set of deployable jaw electrodes each having a sharp end; and applying RF energy to said electrodes.
Claim 19
Dependent Claim
28 words
The lead extraction application as in claim 15, further comprising fluid being supplied to the distal tip section of the catheter sheath and disposed out of the opening.
Claim 20
Dependent Claim
24 words
The lead extraction application as in claim 15, further comprising fluid being selected from the group of saline, heparin, antibiotics, chemotherapy and therapeutics fluids.
Claim 21
Dependent Claim
79 words
The lead extraction application as in claim 15, further comprising an electrode deployment means positioned at the distal end of said catheter sheath, wherein said electrode deployment means including a retractable tip section, comprising a non-deployed state for said retractable tip section when said tip section being positioned in the catheter sheath, and further comprising a distended deployed state for said retractable tip section when said tip section being advanced out of the distal end of said catheter sheath.
Claim 22
Dependent Claim
42 words
The lead extraction application as in claim 18, further comprising a preformed shape for said deployed tip section, whereby a set of multiple jaw electrodes on said tip section extending outwardly to each respective side of said catheter sheath when being deployed.
Claim 23
Dependent Claim
23 words
The lead extraction application as in claim 15, further comprising at least one ultrasonic visible marker being disposed at the distal tip section.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-07-13 | 2002-01-12 | 2002-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-07-13 | 2006-01-12 | 2006-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-07-13 | 2010-01-12 | 2010-07-14 | $7700.00 | Window Closed / Lapsed |