Selectable Eccentric Remodeling and/or Ablation of Atherosclerotic Material
First Claim
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1. A system for remodeling of tissue about a blood vessel of a patient, the system comprising:
- an elongate catheter body having a proximal end and a distal end with an axis therebetween for delivery into the blood vessel;
a radially expandable structure near the distal end of the catheter body;
a plurality of electrodes supported by the expandable structure so as to be urged radially outward and engage a luminal wall of the blood vessel when the expandable structure expands therein; and
a power source electrically coupled to the electrodes, the power source configured for energizing the electrodes so as to remodel the tissue.
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Abstract
A catheter and catheter system for eccentric remodeling and/or removal of atherosclerotic material of a blood vessel of a patient include an elongate flexible catheter body with a radially expandable structure. A plurality of electrodes or other electrosurgical energy delivery surfaces can radially engage atherosclerotic material when the structure expands. An atherosclerotic material detector near the distal end of the catheter body may measure circumferential atherosclerotic material distribution, and a power source selectively energizes the electrodes to eccentrically remodel the measured atherosclerotic material.
166 Citations
28 Claims
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1. A system for remodeling of tissue about a blood vessel of a patient, the system comprising:
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an elongate catheter body having a proximal end and a distal end with an axis therebetween for delivery into the blood vessel; a radially expandable structure near the distal end of the catheter body; a plurality of electrodes supported by the expandable structure so as to be urged radially outward and engage a luminal wall of the blood vessel when the expandable structure expands therein; and a power source electrically coupled to the electrodes, the power source configured for energizing the electrodes so as to remodel the tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A system for eccentric remodeling of a tissue material about a body lumen of a patient, the system comprising:
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a catheter having a distal balloon for delivery into a blood vessel; an array of electrodes mounted on a surface of the balloon and distributed circumferentially about the balloon, wherein the electrodes are configured for use in selected pairs; and an RF power source supply coupled with the electrodes and configured to deliver controlled remodeling energy to the tissue material by energizing selected pairs of the electrodes with bipolar remodeling energy so as to remodel the tissue material while limiting collateral tissue damage. - View Dependent Claims (23)
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24. A method for eccentrically remodeling a tissue material about a body lumen, the method comprising:
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positioning a working end of a balloon catheter within the body lumen, the catheter defining an axis; radially expanding the balloon so as to urge a plurality of electrodes mounted on a surface of the balloon radially outward so as to directly engage a luminal wall; and delivering controlled remodeling energy to the tissue material from the engaged electrodes by energizing selected pairs of the electrodes to direct RF energy so as to remodel the tissue material while limiting collateral tissue damage. - View Dependent Claims (25, 26, 27, 28)
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Specification