CATHETER APPARATUSES HAVING EXPANDABLE MESH STRUCTURES FOR RENAL NEUROMODULATION AND ASSOCIATED SYSTEMS AND METHODS
First Claim
1. A catheter apparatus for treatment of a human patient via renal denervation, the catheter apparatus comprising:
- an elongated shaft having a proximal portion and a distal portion, wherein the distal portion of the shaft is configured for intravascular delivery to a renal artery of the patient;
a mesh structure at the distal portion of the elongated shaft, wherein the mesh structure is configured to vary between a delivery configuration and a deployed configuration, and wherein the mesh structure comprises interstitial spaces that allow blood to flow through the mesh structure when in the deployed configuration; and
an energy delivery element associated with the mesh structure, wherein the energy delivery element is configured to thermally inhibit neural communication along the renal artery, and wherein, in the deployed configuration, the mesh structure is configured to contact a wall of the renal artery and position the energy delivery element in stable contact with the renal artery wall.
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Accused Products
Abstract
Catheter apparatuses having expandable mesh structures and associated systems and methods for intravascular renal neuromodulation are disclosed herein. A catheter treatment device includes an expandable mesh structure configured to position an energy delivery element in contact with a renal artery via an intravascular path. The mesh structure can assume an expanded configuration for direct and/or indirect application of thermal and/or electrical energy to heat or otherwise electrically modulate neural fibers that contribute to renal function. A collapsed configuration may facilitate insertion and/or removal of the catheter or repositioning of the energy delivery element within the renal artery.
418 Citations
75 Claims
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1. A catheter apparatus for treatment of a human patient via renal denervation, the catheter apparatus comprising:
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an elongated shaft having a proximal portion and a distal portion, wherein the distal portion of the shaft is configured for intravascular delivery to a renal artery of the patient; a mesh structure at the distal portion of the elongated shaft, wherein the mesh structure is configured to vary between a delivery configuration and a deployed configuration, and wherein the mesh structure comprises interstitial spaces that allow blood to flow through the mesh structure when in the deployed configuration; and an energy delivery element associated with the mesh structure, wherein the energy delivery element is configured to thermally inhibit neural communication along the renal artery, and wherein, in the deployed configuration, the mesh structure is configured to contact a wall of the renal artery and position the energy delivery element in stable contact with the renal artery wall. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A system, comprising:
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a renal denervation catheter comprising— a mesh structure disposed proximate to a distal portion of an elongated catheter body, wherein the mesh structure comprises interstitial spaces that allow blood to flow through the mesh structure when the renal denervation catheter is inserted into a renal artery of a human patient, and wherein a length of the mesh structure relative to the elongated catheter body decreases as the mesh structure expands from a delivery arrangement to a deployed arrangement; and at least one energy delivery element associated with the mesh structure, wherein less than 50% of a total exposed surface area of the energy delivery element is configured to contact a wall of the renal artery; and an energy source electrically coupled to the energy delivery element. - View Dependent Claims (35, 36, 37, 38, 39)
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40. A method of manufacturing a medical device for catheter-based renal neuromodulation, the method comprising:
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providing an elongated shaft having a proximal portion and a distal portion; disposing a mesh structure on a distal portion of the elongated shaft, wherein the mesh structure comprises interstitial spaces that allow blood to flow through the mesh structure when the device is inserted into a renal artery, and wherein a density of the mesh varies within the mesh structure; and disposing at least one energy delivery element on the mesh structure.
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41. A catheter apparatus, comprising:
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an elongated shaft having a proximal portion and a distal portion; a mesh structure disposed proximate to the distal portion of the elongated shaft and configured to permit blood flow through the mesh structure when inserted into a renal artery of a human patient, wherein the mesh structure is moveable between a low-profile arrangement and a fully deployed arrangement, and wherein the mesh structure has a diameter no greater than about 10 mm while in the fully deployed configuration; and at least one energy delivery element associated with the mesh structure, wherein when the mesh structure is deployed within the renal artery to a diameter that is less than the largest diameter of the fully deployed configuration, the mesh structure is configured to contact an inner wall of the renal artery and position the energy delivery element in stable contact with the inner wall. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50)
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51. A catheter apparatus for intravascular modulation of renal nerves, the catheter apparatus comprising:
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an elongated shaft having a proximal portion and a distal portion; an expandable mesh structure disposed proximate to the distal portion of the elongated shaft, wherein the mesh structure is movable between a collapsed delivery configuration and a deployed configuration; at least one energy delivery element carried by the mesh structure; and a fluid redirecting element attached to one or both of the elongated shaft or the mesh structure and disposed within at least a portion of the mesh structure. - View Dependent Claims (52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64)
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65. A catheter apparatus for intravascular modulation of renal nerves, the catheter apparatus comprising:
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an elongated shaft having a proximal portion and a distal portion; a mesh structure disposed proximate to the distal portion of the elongated shaft and configured to permit fluid flow through the mesh structure when the mesh structure is in an expanded configuration; and at least one energy delivery element coupled to the mesh structure, wherein less than 50% of a total exposed surface area of the energy delivery element is configured to contact a renal artery. - View Dependent Claims (66, 67, 68, 69)
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70. A catheter apparatus for intravascular modulation of renal nerves, the catheter apparatus comprising:
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an elongated shaft extending along an axis, the elongated shaft having a proximal portion and a distal portion; a mesh structure disposed proximate to the distal portion of the elongated shaft, wherein the mesh structure comprises a plurality of interstitial spaces that allow blood to flow through the mesh structure when the catheter apparatus is inserted into a renal artery, and wherein a density of the mesh varies within the mesh structure; and at least one energy delivery element associated with the mesh structure. - View Dependent Claims (71, 72, 73, 74, 75)
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Specification