Magnetically guided catheters
First Claim
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1. An electrode assembly for an ablation catheter, comprising:
- a positioning magnet body having a proximal shank portion and a distal portion;
a manifold including a distribution cavity configured to receive irrigation fluid and an irrigation passageway coupled to said cavity having a distal exit port for delivery of said fluid, said cavity and said passageway being isolated from said body, wherein said manifold includes a tubular portion having said distribution cavity and extending along an axis, said tubular portion including a proximal end portion configured to receive said fluid, said irrigation passageway extending from a distal end portion of said tubular portion, said passageway being in fluid communication with said tubular portion, said manifold being disposed in corresponding recesses in said body; and
an outer capsule completely surrounding said body, said capsule comprising electrically conductive material including a distal ablation surface, wherein said capsule comprises an electrically conductive coating, wherein said coating comprises one of;
(i) a first layer of Ni—
Ni material on an outer surface of said body, a second layer comprising gold (Au) material on said first layer and a third layer comprising platinum (Pt) material on said second layer; and
(ii) a first layer of Ni—
Ni material on an outer surface of said body, a second layer comprising titanium (Ti) material on said first layer and a third layer comprising platinum (Pt) material on said second layer.
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Abstract
A magnetically-guided catheter 100 includes a tip positioning magnet in the distal electrode assembly configured to interact with externally applied magnetic fields for magnetically-guided movement. A magnetically-guided mapping catheter 100 includes an electrically-conductive capsule in the form of a casing 146 that includes a distal ablation surface and isolates the positioning magnet from bio-fluids to prevent corrosion. An open irrigation ablation catheter includes an isolated manifold that isolates the positioning magnet from contact with irrigation fluid to prevent corrosion.
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Citations
10 Claims
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1. An electrode assembly for an ablation catheter, comprising:
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a positioning magnet body having a proximal shank portion and a distal portion; a manifold including a distribution cavity configured to receive irrigation fluid and an irrigation passageway coupled to said cavity having a distal exit port for delivery of said fluid, said cavity and said passageway being isolated from said body, wherein said manifold includes a tubular portion having said distribution cavity and extending along an axis, said tubular portion including a proximal end portion configured to receive said fluid, said irrigation passageway extending from a distal end portion of said tubular portion, said passageway being in fluid communication with said tubular portion, said manifold being disposed in corresponding recesses in said body; and an outer capsule completely surrounding said body, said capsule comprising electrically conductive material including a distal ablation surface, wherein said capsule comprises an electrically conductive coating, wherein said coating comprises one of; (i) a first layer of Ni—
Ni material on an outer surface of said body, a second layer comprising gold (Au) material on said first layer and a third layer comprising platinum (Pt) material on said second layer; and(ii) a first layer of Ni—
Ni material on an outer surface of said body, a second layer comprising titanium (Ti) material on said first layer and a third layer comprising platinum (Pt) material on said second layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification