Vacuum-stabilized ablation system
First Claim
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1. A device for ablating tissue, comprising:
- an elongate body defining a lumen therethrough, the elongate body having a proximal end and a distal portion;
at least one ablating element coupled to the distal portion of the elongate body having a first surface and a second surface, the second surface having a base portion, at least one port and a rim, wherein the rim defines an edge perimeter of the ablating element;
at least one cardiac electrode coupled to the distal portion of the elongate body;
a suction lumen coupled to the at least one port at a distal end thereof and a source of varying pressure at a proximal end thereof;
an irrigation channel surrounding at least a portion of the rim; and
an irrigation lumen fluidly coupled to the irrigation channel at a distal end thereof and a source of irrigation fluid at a proximal end thereof.
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Abstract
Cardiac ablation systems include vacuum-stabilized, irrigated ablation devices that have ablating elements capable of providing regions of relatively low pressure to maintain the ablating element in a stable position relative to the tissue, or minimize relative movement of the ablating element relative to the tissue. The ablation elements have integrated structures for vacuum-stabilization. The devices also include one or more electrodes for both orienting the ablating element as well as for diagnostic purposes.
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Citations
21 Claims
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1. A device for ablating tissue, comprising:
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an elongate body defining a lumen therethrough, the elongate body having a proximal end and a distal portion; at least one ablating element coupled to the distal portion of the elongate body having a first surface and a second surface, the second surface having a base portion, at least one port and a rim, wherein the rim defines an edge perimeter of the ablating element; at least one cardiac electrode coupled to the distal portion of the elongate body; a suction lumen coupled to the at least one port at a distal end thereof and a source of varying pressure at a proximal end thereof; an irrigation channel surrounding at least a portion of the rim; and an irrigation lumen fluidly coupled to the irrigation channel at a distal end thereof and a source of irrigation fluid at a proximal end thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An ablation tip for a medical device, comprising:
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a housing; a radiofrequency (RF) ablating element disposed within the housing, the RF ablating element comprising a first surface and a second surface having a base portion, at least one port and a rim, wherein the rim defines an edge perimeter of the ablating element, and the ablating element comprises an electrode; at least one pair of electrodes disposed along an outer surface of the housing on opposite sides of the RF ablating element; a suction cavity adjacent the first surface of the ablating element, the suction cavity being connectable to a suction lumen; an irrigation channel surrounding at least a portion of the rim; and an irrigation inlet port in fluid communication with the irrigation channel and being connectable to an irrigation inlet lumen. - View Dependent Claims (14, 15, 16)
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17. A device for ablating tissue, comprising:
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a guiding catheter having an elongate guiding catheter body, a first handle at a proximal end thereof, and a continuous lumen through the body and the first handle; an ablation catheter disposed within the continuous lumen permitting mutual axial and longitudinal movement of the guiding catheter and the ablation catheter, the ablation catheter comprising an elongate ablation catheter body defining a lumen therethrough, the elongate ablation catheter body having a proximal end and a distal portion; a second handle at the proximal end of the elongate ablation catheter body; at least one ablating element coupled to the distal portion of the elongate ablation catheter body, the at least one ablating element comprising a first surface and a second surface, the second surface having a base portion, at least one port and a rim, wherein the rim defines an edge perimeter of the ablating element; at least one pair of electrodes disposed on opposite sides of the at least one ablating element, a suction lumen coupled to the at least one suction port and to a remote source of varying pressure disposed distally relative to the second handle; an irrigation channel surrounding at least a portion of the rim and fluidly coupled to a remote source of irrigation fluid; wherein controlled movement of the second handle allows the distal portion of the ablation catheter to rotate axially and displace longitudinally thereby placing the second surface of the ablating element in operative contact with a volume of target tissue. - View Dependent Claims (18, 19, 20, 21)
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Specification