Catheter apparatuses, systems, and methods for renal neuromodulation
First Claim
1. A method of treating a human patient diagnosed with hypertension, the method comprising:
- intravascularly positioning a catheter within a renal artery of the patient and adjacent to target neural fibers innervating a kidney of the patient, the catheter comprising a distal region including a first flexure zone and a second flexure zone extending distally from the first flexure zone, wherein the second flexure zone includes a plurality of electrodes, and wherein the second flexure zone is configured for spiral deflection;
delivering a thermal fluid infusate through one or more of the individual electrodes and into the renal artery; and
at least partially ablating the target neural fibers via radio frequency (RF) energy delivered via the electrodes.
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Abstract
Catheter apparatuses, systems, and methods for achieving renal neuromodulation by intravascular access are disclosed herein. One aspect of the present application, for example, is directed to apparatuses, systems, and methods that incorporate a catheter treatment device comprising an elongated shaft. The elongated shaft is sized and configured to deliver an energy delivery element to a renal artery via an intravascular path. Thermal or electrical renal neuromodulation may be achieved via direct and/or via indirect application of thermal and/or electrical energy to heat or cool, or otherwise electrically modulate, neural fibers that contribute to renal function, or of vascular structures that feed or perfuse the neural fibers.
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Citations
22 Claims
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1. A method of treating a human patient diagnosed with hypertension, the method comprising:
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intravascularly positioning a catheter within a renal artery of the patient and adjacent to target neural fibers innervating a kidney of the patient, the catheter comprising a distal region including a first flexure zone and a second flexure zone extending distally from the first flexure zone, wherein the second flexure zone includes a plurality of electrodes, and wherein the second flexure zone is configured for spiral deflection; delivering a thermal fluid infusate through one or more of the individual electrodes and into the renal artery; and at least partially ablating the target neural fibers via radio frequency (RF) energy delivered via the electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification