Off-wall electrode device and methods for nerve modulation
AssigneeBoston Scientific Scimed, Inc.
InventorsJASON P. HILL, MARK L. JENSON
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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.
Claims20
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 an insulative section connected to a bare electrode section;
- and
- 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.
A renal ablation system for nerve modulation through a wall of a blood vessel, the system comprising:
- 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;
- and
- 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.
A method for ablating tissue through a vessel lumen, the method comprising:
- 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;
- 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.
Dependencies are inferred from the claim text.