Off-wall electrode device and methods for nerve modulation
First Claim
1. An ablative catheter for nerve modulation through a wall of a blood vessel, the catheter comprising:
- a catheter sheath having a proximal end, a distal end, and a lumen extending from the proximal to the distal end;
an elongate member extending along a central elongate axis within the lumen of the catheter sheath, the elongate member having a proximal end and a distal end;
an expandable ablative member coupled to the distal end of the elongate member having one or more insulative sections connected to a bare electrode section;
wherein the ablative member is configured to switch between a collapsed position and an expanded position extending out of the distal end of the catheter sheath such that a portion of the insulative section contacts the wall of the blood vessel and the bare electrode section is disposed at a distance from the wall of the blood vessel, the expandable ablative member having a generally helical shape of variable outer diameter; and
wherein the ablative member is an expandable wire configured to form two or more humps and one or more troughs in between the two or more humps in the expanded position such that the insulative sections form the two or more humps and the bare electrode section forms the one or more troughs.
1 Assignment
0 Petitions
Accused Products
Abstract
Medical devices and methods for making and using the same are disclosed. An example medical device may include an ablative catheter for nerve modulation through a wall of a blood vessel. The catheter may include a catheter sheath having a proximal end, a distal end, and a lumen extending from the proximal to the distal end. An elongate member may extend along a central elongate axis within the lumen of the catheter sheath. The elongate member having a proximal end and a distal end. An expandable ablative member may be coupled to the distal end of the elongate member having an insulative section connected to a bare electrode section. The ablative member may be configured to switch between a collapsed position and an expanded position.
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Citations
18 Claims
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1. An ablative catheter for nerve modulation through a wall of a blood vessel, the catheter comprising:
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a catheter sheath having a proximal end, a distal end, and a lumen extending from the proximal to the distal end; an elongate member extending along a central elongate axis within the lumen of the catheter sheath, the elongate member having a proximal end and a distal end; an expandable ablative member coupled to the distal end of the elongate member having one or more insulative sections connected to a bare electrode section; wherein the ablative member is configured to switch between a collapsed position and an expanded position extending out of the distal end of the catheter sheath such that a portion of the insulative section contacts the wall of the blood vessel and the bare electrode section is disposed at a distance from the wall of the blood vessel, the expandable ablative member having a generally helical shape of variable outer diameter; and wherein the ablative member is an expandable wire configured to form two or more humps and one or more troughs in between the two or more humps in the expanded position such that the insulative sections form the two or more humps and the bare electrode section forms the one or more troughs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A renal ablation system for nerve modulation through a wall of a blood vessel, the system comprising:
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an elongate member extending along a central elongate axis, the elongate member having a proximal end and a distal end; an expandable ablative member coupled to the distal end of the elongate member, the ablative member having one or more conductor wires, the conductor wires comprising; one or more bare electrode sections each having a proximal end and a distal end, and one or more insulative sections; the ablative member configured to switch between a collapsed position an expanded position; wherein in the expanded position, the insulative portions contact the wall of the blood vessel and the bare electrode sections are positioned at a distance from the wall of the blood vessel; and wherein, in the expanded position, one or more of the conductor wires are configured to form two or more humps and one or more troughs, such that the insulative sections form the two or more humps and the bare electrode sections form the one or more troughs. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A method for ablating tissue through a vessel lumen, the method comprising:
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advancing an ablative catheter intravascularly proximate a desired location in a blood vessel, the ablative catheter including an elongate member and an expandable ablative member having one or more bare electrode sections disposed along a center region of the ablative member and one or more insulative sections extending from the proximal end and distal end of the bare electrode sections; wherein the ablative member is an expandable wire configured to form two or more humps and one or more troughs in between the two or more humps in the expanded position such that the insulative sections form the two or more humps and the bare electrode sections form the one or more troughs; deploying the expandable ablative member in an expanded position in the vessel lumen such that portions of the insulative sections contact a wall of the blood vessel and the bare electrode sections maintain a distance from the wall of the blood vessel; and activating the bare electrode sections to ablate at least a portion of a target tissue. - View Dependent Claims (17, 18)
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Specification