Spiral Balloon Catheter for Renal Nerve Ablation
First Claim
1. An apparatus, comprising:
- a catheter comprising a flexible shaft having a lumen arrangement, a proximal end, a distal end, and a length sufficient to access at least the renal artery from a percutaneous access location of a patient;
a balloon arrangement provided at the distal end of the shaft and fluidly coupled to the lumen arrangement, the balloon arrangement dimensioned for deployment within the renal artery and comprising;
an elongated balloon body configured to complete at least one revolution of the shaft'"'"'s distal end to form a spiral configuration thereabout; and
a mounting arrangement provided at the distal end of the shaft and configured to maintain the balloon body in the spiral configuration during expansion and contraction of the balloon body;
an electrode arrangement provided on the balloon body and defining one or more electrode contact regions of the balloon body, the electrode arrangement configured to ablate perivascular nerves of the renal artery in a substantially spiral pattern; and
wherein at least the distal end of the shaft has a stiffness sufficient to oppose a force produced by the balloon body when inflated that tends to contort the shaft'"'"'s distal end and to maintain a substantially constant apposition force between the electrode contact regions and an inner wall of the renal artery.
1 Assignment
0 Petitions
Accused Products
Abstract
A catheter comprises a flexible shaft having a length for accessing the renal artery. A balloon arrangement, dimensioned for deployment within the renal artery, is provided at the shaft'"'"'s distal end and fluidly coupled to a lumen arrangement. A balloon body is configured to complete at least one revolution of the shaft'"'"'s distal end to form a spiral configuration thereabout, and is secured to the shaft by one or more movable mounting arrangements. The balloon body supports an electrode arrangement for ablating perivascular renal nerves in a substantially spiral pattern. A cooling arrangement cools at least the electrode contact regions during ablation. The distal end of the shaft has a stiffness sufficient to oppose a force produced by the balloon body when inflated that tends to contort the shaft'"'"'s distal end and to maintain a substantially constant apposition force between the electrodes and an inner wall of the renal artery.
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Citations
24 Claims
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1. An apparatus, comprising:
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a catheter comprising a flexible shaft having a lumen arrangement, a proximal end, a distal end, and a length sufficient to access at least the renal artery from a percutaneous access location of a patient; a balloon arrangement provided at the distal end of the shaft and fluidly coupled to the lumen arrangement, the balloon arrangement dimensioned for deployment within the renal artery and comprising; an elongated balloon body configured to complete at least one revolution of the shaft'"'"'s distal end to form a spiral configuration thereabout; and a mounting arrangement provided at the distal end of the shaft and configured to maintain the balloon body in the spiral configuration during expansion and contraction of the balloon body; an electrode arrangement provided on the balloon body and defining one or more electrode contact regions of the balloon body, the electrode arrangement configured to ablate perivascular nerves of the renal artery in a substantially spiral pattern; and wherein at least the distal end of the shaft has a stiffness sufficient to oppose a force produced by the balloon body when inflated that tends to contort the shaft'"'"'s distal end and to maintain a substantially constant apposition force between the electrode contact regions and an inner wall of the renal artery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An apparatus, comprising:
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a catheter comprising a flexible shaft having a lumen arrangement, a proximal end, a distal end, and a length sufficient to access at least a target vessel within the body from a percutaneous access location of a patient; a balloon arrangement provided at the distal end of the shaft and fluidly coupled to the lumen arrangement, the balloon arrangement dimensioned for deployment within the target vessel and comprising; an elongated balloon body configured to complete at least one revolution of the shaft'"'"'s distal end to form a spiral configuration thereabout; and a mounting arrangement provided at the distal end of the shaft and configured to maintain the balloon body in the spiral configuration during expansion and contraction of the balloon body; an electrode arrangement provided on the balloon body and defining one or more electrode contact regions of the balloon body, the electrode arrangement configured to ablate target tissue of or adjacent the target vessel in a substantially spiral pattern; and wherein at least the distal end of the shaft has a stiffness sufficient to oppose a force produced by the balloon body when inflated that tends to contort the shaft'"'"'s distal end and to maintain a substantially constant apposition force between the electrode contact regions and an inner wall of the target vessel. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A method, comprising:
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supplying a pressurized fluid to an elongated balloon body of a balloon arrangement provided on a catheter shaft and positionable within a renal artery, the balloon body configured to complete at least one revolution of the shaft'"'"'s distal end to form a spiral configuration thereabout; inflating the elongated balloon body to assume an expanded spiral configuration in response to supplying the pressurized fluid so that an electrode arrangement provided on the balloon body engages an inner wall of the renal artery at one or more electrode contact regions; opposing, at least by the distal end of the shaft, a force produced by the balloon body when inflated that tends to contort the shaft'"'"'s distal end to maintain a substantially constant apposition force between the one or more electrode contact regions and the inner wall of the renal artery; and ablating perivascular nerves of the renal artery in a substantially spiral pattern using the electrode arrangement while the balloon body is inflated. - View Dependent Claims (22, 23, 24)
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Specification