Methods for renal neuromodulation
First Claim
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1. A method for renal neuromodulation, the method comprising:
- positioning a spiral element of a catheter at an extra-arterial location within a human patient and adjacent to neural fibers innervating a kidney of the patient;
transforming the spiral element from a low-profile delivery configuration to an expanded treatment configuration,wherein, in the treatment configuration, the spiral element is sized and shaped to place a plurality of individual, discrete electrodes arranged thereabout in apposition with target tissue at or near the neural fibers; and
ablating the neural fibers innervating the kidney via radio frequency (RF) energy from the electrodes, wherein ablating the neural fibers innervating the kidney results in a therapeutically beneficial reduction in blood pressure in the patient.
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Abstract
Methods and apparatus are provided for renal neuromodulation using a pulsed electric field to effectuate electroporation or electrofusion. It is expected that renal neuromodulation (e.g., denervation) may, among other things, reduce expansion of an acute myocardial infarction, reduce or prevent the onset of morphological changes that are affiliated with congestive heart failure, and/or be efficacious in the treatment of end stage renal disease. Embodiments of the present invention are configured for extravascular delivery of pulsed electric fields to achieve such neuromodulation.
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Citations
23 Claims
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1. A method for renal neuromodulation, the method comprising:
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positioning a spiral element of a catheter at an extra-arterial location within a human patient and adjacent to neural fibers innervating a kidney of the patient; transforming the spiral element from a low-profile delivery configuration to an expanded treatment configuration, wherein, in the treatment configuration, the spiral element is sized and shaped to place a plurality of individual, discrete electrodes arranged thereabout in apposition with target tissue at or near the neural fibers; and ablating the neural fibers innervating the kidney via radio frequency (RF) energy from the electrodes, wherein ablating the neural fibers innervating the kidney results in a therapeutically beneficial reduction in blood pressure in the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for treatment of a hypertensive human patient, the method comprising:
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extravascularly positioning a pre-shaped distal segment of a treatment device proximate renal nerves of the patient, wherein the pre-shaped distal segment comprises a plurality of energy delivery elements; and delivering an energy field via the energy delivery elements to disrupt neural traffic along the renal nerves wherein disrupting the neural traffic along the renal nerves reduces neural signaling to and from a kidney of the patient, wherein delivering the energy field results in a therapeutically beneficial reduction in blood pressure of the patient. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification