EP0771547A2
Expired / Lapsed
EP
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Endocardial mapping and ablation system and catheter probe
Assignee: Cardiac Pathways Corp
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Filing: 1992-02-17
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Granted: —
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Expires: 2012-02-17
Abstract
Abstract Endocardial mapping and/or ablation system (21) for introduction into a chamber of the heart formed by a wall, by passage through a lumen leading to the chamber in the heart having blood therein, comprising a catheter probe (22) with proximal and distal extremities (37, 38) and having an elongate tubular member (36) with at least one lumen (39) extending therethrough extending the length thereof and with a distal extremity. A plurality of longitudinally and radially spaced apart electrodes (67, 68) are provided. An expandable device (46) is secured to the distal extremity of the flexible elongate tubular member and is movable between a contracted position and an expanded position. The electrodes (67, 68) are mounted on the expandable device (46) whereby when the expandable device (46) is moved to the expanded position in a chamber of the heart the electrodes (67, 68) are moved into engagement with the wall forming the chamber of the heart in which the expandable device (46) is disposed. An elongate element is coupled to the expandable device for moving the expandable device between the contracted and expanded positions. The expandable device (46) has spaces therein through which the blood can flow when the expandable device (46) is in a expanded position. Leads (71) are in contact with the electrodes (67, 68) and extending through the flexible elongate tubular member (36). Electrical apparatus is connected to the leads for performing electrical functions with respect to the electrodes.
Inventors
- 👤 Mir A. Imran
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 17:09
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/68; A61B5/6846; A61B5/6847; A61B5/6852; A61B5/6858; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1492; A61B5/24; A61B5/25; A61B5/279; A61B5/28; A61B5/283; A61B5/287; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; A61N1/056; A61B18/1402; A61B17/00; A61B17/00234; A61B2017/00292; A61B17/22; A61B2017/22038; A61B2018/00053; A61B2018/00059; A61B2018/00071; A61B2018/00083; A61B2018/00107; A61B2018/0016; A61B2018/00214; A61B2018/00267; A61B2018/00315; A61B2018/00345; A61B2018/00351; A61B2018/00357; A61B2018/00571; A61B2018/00577; A61B2018/00636; A61B2018/00773; A61B2018/00839; A61B2018/00869; A61B2018/0091; A61B18/1206; A61B2018/124; A61B2018/1246; A61B2018/1253; A61B2018/126; A61B2018/1405; A61B2018/1435; A61B2562/00; A61B2562/04; A61B2562/043; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204; Y10T29/49208; Y10T29/49222; Y10T29/49826; Y10T29/49877
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
245 words
An endocardial mapping and/or ablation system for introduction into a chamber of the heart formed by a wall by passage through a lumen leading to the chamber in the heart having blood therein comprising a catheter probe (22) having proximal and distal extremities and comprised of a flexible elongate tubular member (36) having at least one lumen (39) extending therethrough and extending the length thereof and having a distal extremity (38), a plurality of longitudinally and radially spaced-apart electrodes (67,68), expandable means (46) secured to the distal extremity of the flexible elongate tubular member and being movable between a contracted position and an expanded position, means (69) mounting said electrodes on said expandable means whereby when said expandable means is moved to the expanded position in the chamber of the heart the electrodes are moved into engagement with the wall forming the chamber of the heart and means (61,116) carried by the expandable means for causing movement of said expandable means between said contracted and expanded positions, said expandable means having spaces therein when in the expanded position through which the blood can flow, lead means (71) in contact with the electrodes and extending into said flexible elongate tubular member and electrical means (31) connected to said lead means for performing electrical functions with respect to said electrodes characterized in that the electrodes are positioned so that the entire wall of the heart forming the chamber can be mapped without rotation of the catheter probe.
Claim 2
Dependent Claim
72 words
A system as in Claim 1 wherein said expandable means includes a plurality of circumferentially spaced apart longitudinally extending arms (47) having proximal extremities which are fastened together and distal extremities which are fastened together characterized in that each of said arms has an outer surface (69) and an inner surface and wherein said plurality of longitudinally and radially spaced apart electrodes are disposed solely on the outer surfaces of the arms.
Claim 3
Dependent Claim
34 words
A system as in Claim 2 further characterised in that the lead means in contact with the electrodes are in the form of conductors (71) adherent to the inner surfaces (72) of the arms.
Claim 4
Dependent Claim
26 words
A system as in Claim 1 further characterised in that each of said arms includes an element (61) disposed therein which imparts springiness to the arm.
Claim 5
Dependent Claim
51 words
A system as in Claim 4 further characterised in that at least certain of said spring-like elements are provided with a predetermined configuration to provide a predetermined conformation to the arms as they are bowed outwardly so as to conform more closely to the wall of the chamber of the heart.
Claim 6
Dependent Claim
26 words
A system as in Claim 1 further characterised in that said expandable means includes at least one flexible elongate element in the form of a helix.
Claim 7
Dependent Claim
152 words
A catheter probe for use in an endocardial mapping and/or ablation system comprising a flexible elongate element (36) having proximal and distal extremities and having at least one lumen (39) extending therethrough, a flexible cylindrical member (46) secured to the distal extremity of the flexible elongate element and being movable between a normal contracted position and an expanded position, said cylindrical member having a plurality of circumferentially spaced longitudinally extending flexible arms (47) having proximal and distal extremities which are secured to form a part of the cylindrical member, each of said arms having an outer surface (69) and an inner surface (72), a plurality of spaced-apart electrodes (67,68) disposed on the outer surfaces (69) of each of the arms, conductor means (71) including conductors carried by said arms on the inner surfaces of the arms and connected to said electrodes and extending to the proximal extremity of the flexible elongate element.
Claim 8
Dependent Claim
152 words
A catheter probe (22) for use in an endocardial mapping and/or ablation system comprising a flexible elongate element (36) having proximal and distal extremities and having at least one lumen (39) extending therethrough, a flexible cylindrical member (46) secured to the distal extremity of the flexible elongate element and being movable between a normal contracted position and an expanded position, said cylindrical member having a plurality of circumferentially spaced longitudinally extending flexible arms (47) having proximal and distal extremities which are secured to form a part of the cylindrical member, each of said arms having an outer surface (69) and an inner surface (72), a plurality of spaced-apart electrodes (67,68) disposed on the outer surfaces of each of the arms, conductor means (71) including conductors carried by said arms on the inner surfaces of the arms and connected to said electrodes and extending to the proximal extremity of the flexible elongate element.
Claim 9
Independent Claim
105 words
A method for forming a flexible expandable member for use with a catheter probe, the method comprising a flexible elongate element of insulating material, forming electrodes on the element on one side thereof, wrapping said element into a helix by one end of the element with respect to the other end of the element in one circumferential direction to provide a cylinder and rotating one end of the flexible elongate element with respect to the other end of the flexible elongate element in an opposite circumferential direction to cause the helix previously formed to expand to move the electrodes carried thereby in an outward position.
References Cited (Backward Citations)
US4699147A
Cited
WO1989004143A1
Cited
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