Catheter-focused magnetic field induced renal nerve ablation
First Claim
1. A system, comprising:
- an internal apparatus intended to be deployed within a patient, the internal apparatus including;
a flexible elongated member comprising a proximal end, a distal end, and a length sufficient to access a target vessel of the body relative to a percutaneous access location; and
a magnetically permeable element provided at a distal end of the elongated member, the magnetically permeable element having poor electrical conductivity and configured for placement within the target vessel and adjacent a wall of the target vessel; and
an external apparatus intended to be deployed outside of the patient, the external apparatus including;
one or more external coils positionable on one or both of anterior and posterior portions of a patient in proximity to the target vessel; and
a generator coupled to the external coils and configured to energize the external coils to create a high-frequency oscillating magnetic field in body tissue between the external coils including the target vessel and target tissue proximate the target vessel;
wherein the magnetically permeable element serves to concentrate the magnetic field, created by the external apparatus, in a region near the target vessel, the concentrated magnetic field inducing high frequency electric current sufficient to ablate the target tissue proximate the vessel.
1 Assignment
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Accused Products
Abstract
A flexible catheter includes a magnetically permeable element provided at its distal end. The magnetically permeable element is configured for placement within the renal artery. External coils, positionable on anterior and posterior portions of a patient in proximity to the renal artery, are coupled to a generator which energizes the external coils to create a high-frequency oscillating magnetic field in body tissue between the external coils including the renal artery and perivascular renal nerve tissue. The magnetically permeable element serves to concentrate the magnetic field in a region near the renal artery. The concentrated magnetic field induces high frequency electric current sufficient to ablate the perivascular renal nerve tissue proximate the renal artery. A cooling arrangement can be provided at the catheter'"'"'s distal end and configured to provide cooling to the renal artery during ablation of the perivascular renal nerve tissue.
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Citations
23 Claims
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1. A system, comprising:
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an internal apparatus intended to be deployed within a patient, the internal apparatus including; a flexible elongated member comprising a proximal end, a distal end, and a length sufficient to access a target vessel of the body relative to a percutaneous access location; and a magnetically permeable element provided at a distal end of the elongated member, the magnetically permeable element having poor electrical conductivity and configured for placement within the target vessel and adjacent a wall of the target vessel; and an external apparatus intended to be deployed outside of the patient, the external apparatus including; one or more external coils positionable on one or both of anterior and posterior portions of a patient in proximity to the target vessel; and a generator coupled to the external coils and configured to energize the external coils to create a high-frequency oscillating magnetic field in body tissue between the external coils including the target vessel and target tissue proximate the target vessel; wherein the magnetically permeable element serves to concentrate the magnetic field, created by the external apparatus, in a region near the target vessel, the concentrated magnetic field inducing high frequency electric current sufficient to ablate the target tissue proximate the vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system comprising:
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a flexible elongated member comprising a proximal end, a distal end, and a length sufficient to access a renal artery relative to a percutaneous access location; a magnetically permeable element provided at a distal end of the elongated member, the magnetically permeable element having poor electrical conductivity and configured for placement within the renal artery and adjacent a wall of the renal artery, the magnetically permeable element deployable within a patient; one or more external coils positionable on one or both of anterior and posterior portions of the patient, exterior to the patient;
in proximity to the renal artery; anda generator coupled to the external coils and configured to energize the external coils to create a high-frequency oscillating magnetic field in body tissue between the external coils including the renal artery and perivascular renal nerve tissue proximate the renal artery; the magnetically permeable element serving to concentrate the magnetic field in a region near the renal artery, the concentrated magnetic field inducing high frequency electric current sufficient to ablate the perivascular renal nerve tissue proximate the renal artery. - View Dependent Claims (17, 18, 19, 20)
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21. A method, comprising:
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energizing one or more external coils positionable on one or both of anterior and posterior portions of a patient in proximity to a renal artery to create a high-frequency oscillating magnetic field in body tissue between the external coils including renal artery tissue and perivascular renal nerve tissue adjacent the renal artery; concentrating the magnetic field in a region near the renal artery; and ablating the perivascular renal nerve tissue using high frequency electric current induced in the perivascular renal nerve tissue by the concentrated magnetic field. - View Dependent Claims (22, 23)
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Specification