Medical devices for renal nerve ablation
First Claim
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1. A medical device for performing ablation procedures, comprising:
- an elongate shaft having a distal region;
an expandable member in the form of an expandable balloon having a cylindrical central portion coupled to the distal region;
a plurality of electrodes comprising at least four electrodes coupled to the expandable member;
a conductive member connected to each of the electrodes, where each of the connected conductive members is capable of supplying power to the electrode to which the conductive member is connected; and
a controller connected to each of the conductive members;
wherein the controller is configured to activate each of the plurality of electrodes by supplying power to each of the plurality of electrodes; and
wherein the controller is configured such that when the controller activates one of the plurality of electrodes by supplying power to one of the plurality of electrodes, the controller automatically maintains all of the remaining unpowered electrodes as inactive so as to act as ground electrodes.
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Abstract
Medical devices and methods for making and using the same are disclosed. An example medical device may include a medical device for renal nerve ablation. The medical device may include an elongate shaft having a distal region. An expandable member may be coupled to the distal region. A plurality of electrodes may be coupled to the expandable member and a single conductive member may be coupled to each electrode. Where one of the plurality of electrodes is active, the remaining electrodes may be inactive and act as ground or return electrodes. The electrode of the plurality of electrodes that is active may change over time.
1505 Citations
20 Claims
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1. A medical device for performing ablation procedures, comprising:
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an elongate shaft having a distal region; an expandable member in the form of an expandable balloon having a cylindrical central portion coupled to the distal region; a plurality of electrodes comprising at least four electrodes coupled to the expandable member; a conductive member connected to each of the electrodes, where each of the connected conductive members is capable of supplying power to the electrode to which the conductive member is connected; and a controller connected to each of the conductive members; wherein the controller is configured to activate each of the plurality of electrodes by supplying power to each of the plurality of electrodes; and wherein the controller is configured such that when the controller activates one of the plurality of electrodes by supplying power to one of the plurality of electrodes, the controller automatically maintains all of the remaining unpowered electrodes as inactive so as to act as ground electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 16, 17, 18, 19)
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11. A medical device for renal nerve ablation, comprising:
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an elongate shaft having a distal region; an expandable balloon having a cylindrical central portion coupled to the distal region, wherein the balloon is configured to be advanced through a blood vessel to a position within a renal artery and expanded in the renal artery; a plurality of electrodes comprising four electrodes coupled to the balloon; and a plurality of conductive traces coupled to the elongate shaft, where a single conductive trace of the plurality of conductive traces is connected to each of the electrodes such that each of the connected single conductive traces is capable of supplying power to the electrode to which the single conductive trace is connected; and a controller connected to each of the conductive traces, wherein the controller is configured to activate each of the plurality of electrodes by supplying power to each of the plurality of electrodes; wherein the controller is configured such that when the controller activates one of the plurality of electrodes by supplying power to one of the plurality of electrodes, the controller automatically maintains all of the remaining plurality of electrodes as inactive so as to act as a ground electrode. - View Dependent Claims (12, 13, 14, 20)
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Specification