EP0774926B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
r-f ablation apparatus
Assignee: Medtronic Inc
•
Filing: 1994-07-25
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Granted: 1999-06-09
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Expires: 2014-07-25
Abstract
Abstract An ablation cathetere and a method of performing cardiac ablation. The catheter is provided with a hollow, helical electrode, which is screwed into cardiac tissue at a desired ablation site and connected to a source of R-F electrical energy to ablate the tissue adjacent the electrode. Prior to ablation, a conductive fluid may be injected through the hollow needle, both to provide for cooling of the tissue adjacent the needle and to increase the conductivity of the tissue in the area of the electrode.
Inventors
- 👤 Peter M. J. Mulier
- 👤 Michael F. Hoey
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 09:17
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1477; A61B18/1492; A61B10/00; A61B10/02; A61B17/00; A61B2017/00017; A61B2017/00022; A61B2017/00084; A61B2017/00092; A61B2017/00097; A61B17/00234; A61B2017/00238; A61B2017/00274; A61B2017/00292; A61B17/22; A61B2017/22072; A61B2017/22074; A61B2017/22077; A61B2018/00005; A61B2018/00011; A61B2018/00023; A61B2018/00029; A61B2018/00053; A61B2018/00059; A61B2018/00065; A61B2018/00214; A61B2018/0022; A61B2018/00315; A61B2018/00345; A61B2018/00351; A61B2018/00452; A61B2018/00476; A61B2018/00547; A61B2018/00571; A61B2018/00577; A61B2018/00636; A61B2018/00773; A61B2018/00791; A61B2018/00821; A61B18/1206; A61B2018/1246; A61B2018/1253; A61B2018/126; A61B2018/1405; A61B2018/1425; A61B2018/1435; A61B2018/1472; A61B90/00; A61B90/06; A61B2090/064; A61B90/39; A61B2090/3925; A61B2218/00; A61B2218/001; A61B2218/002; A61M; A61M25/00; A61M25/0067; A61M25/0082; A61M25/0084; A61M2025/0089; A61M2230/00; A61M2230/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
132 words
An ablation catheter system, comprising: an elongate catheter body (10) having a proximal
portion, a distal portion and a longitudinal lumen; a hollow needle (14) for penetrating body tissue at
a desired location, mounted to a distal portion of said
catheter body (10) and having an internal lumen coupled
to the lumen of said catheter body (10); and a source of conductive fluid, coupled to the
internal lumen of said catheter body, for delivering a
conductive fluid to said lumen of said catheter body
(10); characterised by a conductive electrode surface (14) for delivering
R-F energy to said desired location, mounted to said
distal portion of said catheter body (10); and a source of R-F electrical energy, coupled to said
electrode surface (14), and wherein said hollow needle is a helical needle.
Claim 2
Dependent Claim
25 words
A catheter system according to claim 1 wherein
said hollow needle is conductive and wherein said
electrode surface comprises a surface of said hollow
needle.
Claim 3
Dependent Claim
21 words
A catheter system according to claim 1 or
claim 2, wherein said fluid delivery means comprises
means for delivering Ringer's solution.
Claim 4
Dependent Claim
28 words
A catheter system according to any preceding
claim wherein said conductive fluid delivery means
comprises a reservoir containing said conductive fluid
and a means for controlling fluid flow.
Claim 5
Dependent Claim
23 words
A catheter system according to any preceding
claim, wherein said catheter body comprises a torque
transfer cable, extending longitudinally along said
catheter body.
Claim 6
Dependent Claim
35 words
A catheter system according to claim 5 wherein
said torque transfer cable is conductive and extends
longitudinally along said catheter body (10), coupled to
said hollow needle (14) and to said source of R-F
energy.
Claim 7
Dependent Claim
37 words
A catheter system according to any of claims 1
to 4 wherein said catheter body comprises a conductive
tube, extending longitudinally along said catheter body,
coupled to said hollow needle and to said source of R-F
energy.
Claim 8
Dependent Claim
36 words
A catheter system according to any of claims 1
to 4 wherein said catheter body comprises a plastic
tube, extending longitudinally along said catheter body,
coupled to said hollow needle and to said fluid delivery
means.
Claim 9
Dependent Claim
20 words
A catheter system according to any preceding
claim, further comprising means for sensing electrical
signals, coupled to said electrode surface.
Claim 10
Dependent Claim
20 words
A catheter system according to any preceding
claim, further comprising means for delivering stimulus
pulses, coupled to said electrode surface.
Claim 11
Dependent Claim
138 words
An ablation catheter comprising: an elongate catheter body (10) having a proximal
portion, a distal portion and a longitudinal lumen; a hollow needle (14) for penetrating body tissue at
a desired location, mounted to a distal portion of said
catheter body (10) and having an internal lumen coupled
to the lumen of said catheter body (10); and means (22) for coupling the internal lumen of the
catheter body (10) to a source of conductive fluid, for
delivering a conductive fluid to said lumen of the
catheter body (10), characterised by a conductive electrode surface (14) for delivering
R-F energy to said desired location, mounted to said
distal portion of said catheter body (10); and means (24) for coupling a source of R-F electrical
energy to said electrode surface (14), and wherein said hollow needle is a helical needle.
References Cited (Backward Citations)
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