US5971983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tissue ablation device and method of use
Assignee: University of California
•
Filing: 1997-05-09
•
Granted: 1999-10-26
•
Expires: 2017-05-09
Abstract
Abstract A tissue ablation device creates long linear lesions along a body space wall of an animal, and primarily between adjacent pulmonary vein ostia in a left atrial wall. An ablation element includes first and second ends that are bordered by first and second anchors. The anchors are adapted to secure the ablation element ends at predetermined first and second locations along the body space wall such that the ablation element is adapted to ablate an elongate region of tissue between those locations. The anchors may be guidewire tracking members, each including a bore adapted to receive and track over a guidewire, and may anchor within adjacent pulmonary vein ostia when the engaged guidewires are positioned within the respective veins. Stop members may be provided on the guidewires and may be adapted for positioning the relative anchors or for forcing the anchors to fit snugly within the vein ostia. A conduit passageway through the catheter houses a stiffening stylet which may be advanced into the region of the ablation element in order to impart a shape to that element to conform it to a predetermined region of anatomy, or to stiffen the underlying catheter in order to advance the assembly into remote anatomy.
Inventors
- 👤 Michael D. Lesh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:12
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1492; A61B18/18; A61B18/1815; A61B17/00; A61B17/00234; A61B2017/00238; A61B2017/00243; A61B17/22; A61B2017/22038; A61B2017/22051; A61B2017/22054; A61B2017/22065; A61B2017/22067; A61B2018/00005; A61B2018/00011; A61B2018/00053; A61B2018/0016; A61B2018/00214; A61B2018/00273; A61B2018/00279; A61B2018/00285; A61B2018/00291; A61B2018/00315; A61B2018/00345; A61B2018/00351; A61B2018/00369; A61B2018/00375; A61B2018/00636; A61B2018/00773; A61B2018/00791; A61B2018/00797; A61B2018/00815; A61B2018/00821; A61B2018/00839; A61B2018/00898; A61B2018/00994; A61B2218/00; A61B2218/001; A61B2218/002
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
148 words
A tissue ablation device assembly, comprising: an elongate body with a proximal end portion and a distal end portion; an ablation member located at least in part along the distal end portion of the elongate body with a first end portion, a second end portion located proximally of the first end portion, and an ablation element between the first and second end portions; a first anchor located at least in part along the first end portion wherein the first anchor is adapted to be positioned at least in part within a first pulmonary vein extending from the left atrial wall of a left atrium in a patient in a patient; and a second anchor located at least in part along the second end portion wherein the second anchor is adapted to be positioned at least in part within a second pulmonary vein extending from the left atrial wall.
Claim 2
Dependent Claim
148 words
A tissue ablation device assembly, comprising: an elongate body with a proximal end portion and a distal end portion; an ablation member located at least in part along the distal end portion of the elongate body with a first end portion, a second end portion located proximally of the first end portion, and an ablation element between the first and second end portions; a first anchor located at least in part along the first end portion wherein the first anchor is adapted to be positioned at least in part within a first pulmonary vein extending from the left atrial wall of a left atrium in a patient in a patient; and a second anchor located at least in part along the second end portion wherein the second anchor is adapted to be positioned at least in part within a second pulmonary vein extending from the left atrial wall.
Claim 3
Dependent Claim
70 words
The tissue ablation device assembly of claim 1, wherein the first anchor comprises a first guidewire which is positionable within the first pulmonary vein and also a first guidewire tracking member which is located at least in part along the first end portion and is adapted to moveably engage the first guidewire and to track over the first guidewire when the first guidewire is positioned within the first pulmonary vein.
Claim 4
Dependent Claim
96 words
The tissue ablation device assembly of claim 2, wherein the assembly further comprises a longitudinal axis; the first guidewire tracking member comprises a first guidewire passageway extending along the elongate body between a first distal port located along the distal end portion and a first proximal port located along the elongate body proximally of the first distal port, the first guidewire passageway being adapted to slideably receive the first guidewire through the first distal and proximal ports; and the ablation member is located at least in part along the distal end portion of the elongate body.
Claim 5
Dependent Claim
52 words
The tissue ablation device assembly of claim 2, wherein the second anchor comprises a second guidewire which is positionable within the second pulmonary vein and also a second guidewire tracking member which is located at least in part along the second end portion and is adapted to moveably engage the second guidewire.
Claim 6
Dependent Claim
144 words
The tissue ablation device assembly of claim 4, wherein the assembly further comprises a longitudinal axis; the first guidewire tracking member comprises a first guidewire passageway extending along the elongate body between a first distal port located along the distal end portion and a first proximal port located along the elongate body proximally of the first distal port, the first guidewire passageway being adapted to slideably receive the first guidewire through the first distal and proximal ports; and the second guidewire tracking member comprises a second guidewire passageway extending along the elongate body between a second distal port located proximally of the first distal port along the elongate body and a second proximal port located proximally of the second distal port along the elongate body, the second guidewire passageway being adapted to slideably receive the second guidewire through the second distal and proximal ports.
Claim 7
Dependent Claim
26 words
The tissue ablation device assembly of claim 5, wherein the ablation element is located along the distal end portion between the first and second distal ports.
Claim 8
Dependent Claim
38 words
The tissue ablation device assembly of claim 1, wherein the first anchor comprises an anchoring region formed along the first end portion and which is adapted to have a shape which is positionable within the first pulmonary vein.
Claim 9
Dependent Claim
50 words
The assembly of claim 7, wherein the first anchor further comprises a guidewire tracking member located at least in part along the anchoring region and which is adapted to moveably engage a guidewire positioned within the first pulmonary vein and to track over the guidewire into the first pulmonary vein.
Claim 10
Dependent Claim
46 words
The assembly of claim 7, wherein the anchoring region is a first anchoring region; and the second anchor comprises a second anchoring region formed along the second end portion and which is adapted to have a second shape that is positionable within the second pulmonary vein.
Claim 11
Dependent Claim
127 words
The assembly of claim 9, wherein the first anchor further comprises a first guidewire tracking member located at least in part along the first anchoring region and which is adapted to moveably engage a first guidewire positioned within the first pulmonary vein and to track over the first guidewire until the first guidewire tracking member is positioned at least in part within the first pulmonary vein; and the second anchor further comprises a second guidewire tracking member located at least in part along the second anchoring region and which is adapted to moveably engage a second guidewire positioned within the second pulmonary vein and to track over the second guidewire until the second guidewire tracking member is positioned at least in part within the second pulmonary vein.
Claim 12
Dependent Claim
45 words
The tissue ablation device assembly of claim 1, wherein at least one of said first and second anchors further comprises an expandable member which is adapted to couple to an expansion actuator and to expand to engage a pulmonary vein wall of a pulmonary vein.
Claim 13
Dependent Claim
25 words
The assembly of claim 1, wherein the ablation element comprises at least one ablation electrode which is adapted to couple to an electrical current source.
Claim 14
Dependent Claim
91 words
A tissue ablation device assembly for ablating a region of tissue along an atrial wall of an atrium in a patient, comprising: an ablation member with first and second end portions and an ablation element between the first and second end portions; a first guidewire; a second guidewire; a first guidewire tracking member located along the first end portion and which is adapted to moveably engage the first guidewire; and a second guidewire tracking member located along the second end portion and which is adapted to moveably engage the second guidewire.
Claim 15
Dependent Claim
91 words
A tissue ablation device assembly for ablating a region of tissue along an atrial wall of an atrium in a patient, comprising: an ablation member with first and second end portions and an ablation element between the first and second end portions; a first guidewire; a second guidewire; a first guidewire tracking member located along the first end portion and which is adapted to moveably engage the first guidewire; and a second guidewire tracking member located along the second end portion and which is adapted to moveably engage the second guidewire.
Claim 16
Dependent Claim
109 words
The tissue ablation device assembly of claim 13, wherein the assembly further comprises an elongate body having a proximal end portion, a distal end portion, and a longitudinal axis; the first guidewire tracking member comprises a first guidewire passageway extending along the elongate body between a first distal port located along the distal end portion and a first proximal port located along the elongate body proximally of the first distal port, the first guidewire passageway being adapted to slideably receive the first guidewire through the first distal and proximal ports; and the ablation member is located at least in part along the distal end portion of the elongate body.
Claim 17
Dependent Claim
75 words
The tissue ablation device assembly of claim 14, wherein the second guidewire tracking member comprises a second guidewire passageway extending along the elongate body between a second distal port located proximally of the first distal port along the elongate body and a second proximal port located proximally of the second distal port along the elongate body, the second guidewire passageway being adapted to slideably receive the second guidewire through the second distal and proximal ports.
Claim 18
Dependent Claim
31 words
The assembly of claim 13, wherein the first guidewire is moveably engaged with the first guidewire tracking member; and the second guidewire is moveably engaged with the second guidewire tracking member.
Claim 19
Dependent Claim
25 words
The assembly of claim 13, wherein the ablation element comprises at least one ablation electrode which is adapted to couple to an electrical current source.
Claim 20
Dependent Claim
35 words
The assembly of claim 13, wherein the first and second guidewire tracking members are not adapted to simultaneously, engage and track over a single guidewire when the single guidewire is positioned within a pulmonary vein.
Claim 21
Dependent Claim
84 words
The assembly of claim 13, wherein the first guidewire tracking member has a first guidewire passageway which is adapted to moveably engage the first guidewire; the second guidewire tracking member has a second guidewire passageway which is adapted to moveably engage the second guidewire; and an elongate body has a proximal end portion, a distal end portion coupled to the ablation member, and a common section, wherein each of the first and second guidewire passageways extends at least in part along the common section.
Claim 22
Dependent Claim
64 words
The assembly of claim 13, wherein the first guidewire is adapted to be positioned within a first pulmonary vein extending from a left atrium; and the first guidewire tracking member is adapted to track over the first guidewire and to be positioned within the left atrium, wherein the second guidewire tracking member is also positioned within the left atrium without engaging the first guidewire.
Claim 23
Dependent Claim
37 words
The assembly of claim 13, wherein at least one of the first and second guidewire tracking members forms at least a portion of an anchor which is positionable within a pulmonary vein extending from a left atrium.
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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) | 2002-10-25 | 2003-04-26 | 2003-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-10-25 | 2007-04-26 | 2007-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-10-25 | 2011-04-26 | 2011-10-26 | $7700.00 | Window Closed / Lapsed |