MULTI-ELECTRODE ABLATION SENSING CATHETER AND SYSTEM
First Claim
1. A catheter comprising:
- an elongated catheter shaft having a proximal end, a distal end, and a lumen therethrough; and
,a catheter tip at the distal end of the catheter shaft having two or more closely spaced electrically active elements mounted on the catheter tip, wherein the electrically active elements are coupled to a plurality of electronic circuitries used for electrogram sensing, impedance sensing, and location sensing and orientation.
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Accused Products
Abstract
The invention is directed to a multi-electrode ablation sensing catheter and system suitable for medical procedures such as cardiac ablation. In one embodiment of the invention, a catheter is provided having an elongated catheter shaft and a catheter tip having two or more closely spaced electrodes mounted on the catheter tip, where the electrodes are coupled to a plurality of electronic circuitries and are used for electrogram sensing, impedance sensing, and location sensing and orientation. In another embodiment of the invention, a catheter system is provided having a catheter with an elongated catheter shaft and a catheter tip with two or more closely spaced electrodes mounted on the catheter tip, and an RF generator circuitry, an electrogram sensing circuitry, an impedance sensing circuitry, and a location sensing and orientation circuitry.
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Citations
21 Claims
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1. A catheter comprising:
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an elongated catheter shaft having a proximal end, a distal end, and a lumen therethrough; and
,a catheter tip at the distal end of the catheter shaft having two or more closely spaced electrically active elements mounted on the catheter tip, wherein the electrically active elements are coupled to a plurality of electronic circuitries used for electrogram sensing, impedance sensing, and location sensing and orientation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A catheter system comprising:
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a catheter having an elongated catheter shaft with a proximal end, a distal end, and a lumen therethrough, and having a catheter tip at the distal end of the catheter shaft with a plurality of closely spaced electrically active elements mounted on the catheter tip; RF generator circuitry for applying RF energy across the electrically active elements to a distant return electrically active element; electrogram sensing circuitry for sensing electrogram signals from the electrically active elements; impedance sensing circuitry for applying impedance current across the electrically active elements to the distant return electrically active element; and
,location sensing and orientation circuitry for determining the catheter tip location and orientation. - View Dependent Claims (13, 14, 15, 16, 17)
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18. An ablation sensing catheter system comprising:
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a catheter having an elongated catheter shaft with a proximal end, a distal end, and a lumen therethrough, and having a catheter tip at the distal end of the catheter shaft with a plurality of closely spaced electrodes mounted on the catheter tip; RF generator circuitry for applying RF energy across the electrodes to a distant return electrode; electrogram sensing circuitry for sensing electrogram signals from the electrodes; impedance sensing circuitry for applying impedance current across the electrodes to the distant return electrode; and
,location sensing and orientation circuitry for determining the catheter tip location and orientation. - View Dependent Claims (19, 20, 21)
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Specification