Apparatus for effective ablation and nerve sensing associated with denervation
First Claim
1. A method of modulating nerve activity, comprising:
- positioning a distal portion of a catheter within a renal vessel;
advancing a first needle guiding element and a second needle guiding element outward from the catheter toward an inside surface of the renal vessel;
advancing a first needle and a second needle through the first needle guiding element and second needle guiding element, respectively, and into a peri-vascular space outside of the inside surface of the renal vessel, wherein a distal end of the first needle guiding element and a distal end of the second needle guiding element are configured to maintain their position against the inside surface of the renal vessel as the first needle and the second needle advance into the peri-vascular space; and
operating the catheter to provide at least one modality of neurolysis to nerves located in the peri-vascular space or to sense nerve activity from at least one of the first and second needles.
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Accused Products
Abstract
An intravascular catheter for nerve activity ablation and/or sensing includes one or more needles advanced through supported guide tubes (needle guiding elements) which expand to contact the interior surface of the wall of the renal artery or other vessel of a human body allowing the needles to be advanced though the vessel wall into the extra-luminal tissue including the media, adventitia and periadvential space. The catheter also includes structures which provide radial and lateral support to the guide tubes so that the guide tubes open uniformly and maintain their position against the interior surface of the vessel wall as the sharpened needles are advanced to penetrate into the vessel wall. Electrodes near the distal ends of the needles allow sensing of nerve activity before and after attempted renal denervation. In a combination embodiment ablative energy or fluid is delivered from the needles in or near the adventitia to ablate nerves outside of the media while sparing nerves within the media.
289 Citations
21 Claims
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1. A method of modulating nerve activity, comprising:
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positioning a distal portion of a catheter within a renal vessel; advancing a first needle guiding element and a second needle guiding element outward from the catheter toward an inside surface of the renal vessel; advancing a first needle and a second needle through the first needle guiding element and second needle guiding element, respectively, and into a peri-vascular space outside of the inside surface of the renal vessel, wherein a distal end of the first needle guiding element and a distal end of the second needle guiding element are configured to maintain their position against the inside surface of the renal vessel as the first needle and the second needle advance into the peri-vascular space; and operating the catheter to provide at least one modality of neurolysis to nerves located in the peri-vascular space or to sense nerve activity from at least one of the first and second needles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of modulating nerve activity, comprising:
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positioning a distal portion of a catheter within a vessel of a human patient; advancing at least a first needle guiding element and a second needle guiding element outward from the catheter toward an interior wall of the vessel; advancing at least a first needle and a second needle through the first guiding element and the second needle guiding element and into a peri-vascular region outside of the interior wall of the vessel, wherein a distal end of the first needle guiding element and a distal end of the second needle guiding element are configured to maintain their position against the interior wall of the vessel as the first needle and the second needle advance into the peri-vascular region; wherein the catheter is configured to provide at least a first modality of neurolysis to nerves located in a peri-vascular region of the patient or sense nerve activity from at least one location in the peri-vascular region. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification