DIRECT VISUALIZATION BIPOLAR ABLATION SYSTEMS
First Claim
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1. A tissue treatment apparatus, comprising:
- a reconfigurable structure extending from a deployment catheter and which is capable of intravascular delivery in a low profile delivery configuration and expansion to a deployed configuration which defines an open area bounded at least in part by the structure;
a fluid lumen in communication with the open area of the structure such that introduction of a conductive fluid through the lumen purges the open area of blood when the structure is further bounded by a tissue surface;
a first electrode positioned within or along the structure and at least one second electrode also within or along the structure in proximity to the first electrode, whereby current is conducted between the first and second electrodes such that tissue between the first and second electrodes is treated.
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Abstract
Direct visualization bipolar ablation systems are described which utilize bipolar electrode arrangements. Such assemblies are configured to facilitate the application of bipolar energy delivery, such as RF ablation, to an underlying target tissue for treatment in a controlled manner while directly visualizing the tissue during the bipolar ablation process.
242 Citations
25 Claims
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1. A tissue treatment apparatus, comprising:
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a reconfigurable structure extending from a deployment catheter and which is capable of intravascular delivery in a low profile delivery configuration and expansion to a deployed configuration which defines an open area bounded at least in part by the structure; a fluid lumen in communication with the open area of the structure such that introduction of a conductive fluid through the lumen purges the open area of blood when the structure is further bounded by a tissue surface; a first electrode positioned within or along the structure and at least one second electrode also within or along the structure in proximity to the first electrode, whereby current is conducted between the first and second electrodes such that tissue between the first and second electrodes is treated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of treating tissue, comprising:
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intravascularly advancing a reconfigurable structure in a low profile delivery configuration extending from a deployment catheter; reconfiguring the structure to a deployed configuration which defines an open area bounded at least in part by the structure; positioning the structure against a tissue surface to be treated such that the open area is further bounded at least in part by the tissue surface; purging the open area of blood with a conductive fluid; and conducting a current via the conductive fluid between a first electrode positioned within or along the structure to at least one second electrode also within or along the structure in proximity to the first electrode such that tissue between the first and second electrodes is treated. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A tissue treatment apparatus, comprising:
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a reconfigurable structure extending from a deployment catheter and which is capable of intravascular delivery in a low profile delivery configuration and expansion to a deployed configuration which defines an open area bounded at least in part by the structure; a fluid lumen in communication with the open area of the structure such that introduction of a conductive fluid through the lumen purges the open area of blood when the structure is further bounded by a tissue surface; a first electrode positioned in proximity to the structure and at least one second electrode positioned in proximity to the first electrode, whereby current is conducted between the first and second electrodes such that tissue between the first and second electrodes is treated. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification