Treating tissue pulsed energy using high-voltage catheters
Inventors
Danitz, David J. • Moss, Kevin L. • JOE, Wesley C. • Foster, Christopher J. • Boseck, Gary L. • SOTO-SIDA, Xitlalic Y. • MASTON, Robert • Lunsford, John P.
Assignees
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Publication Number
US-11931570-B2
Publication Date
2024-03-19
Expiration Date
Abstract
Flexible catheters adapted to be inserted into a body to deliver high-voltage, fast (e.g., microsecond, sub-microsecond, nanosecond, picosecond, etc.) electrical energy to target tissue may include a plurality of conductive layers, that may be coaxial. These catheters and method of using them to treat tissue are configured to reduce or avoid arcing.
Core Innovation
The invention provides a method of treating tissue using a catheter that includes two electrically conductive layers formed in a coaxial relationship. The first conductive layer is formed from a first plurality of braided or woven filaments extending at least partially down a length of the catheter, and the second conductive layer extends coaxial to the first conductive layer. A plurality of electrical pulses having an amplitude greater than 0.1 kV is applied at a proximal end of the catheter and delivered to a body of a subject via distal electrodes.
Electrical delivery is performed using a first electrode at a distal end region that is in electrical communication with the first conductive layer, and a second electrode at a distal end region that is in electrical communication with the second conductive layer. The first and second conductive layers are configured to prevent electromagnetic interference (EMI) arising from the first and second conductive layers at high voltages and rapid pulse rates. In this way, the catheter construction supports the delivery of fast electrical pulses while addressing EMI concerns.
The invention also covers a method of delivering pulsed power to a catheter that includes connecting a high-voltage connector to first and second conductive layers. The first conductive layer is formed from one or more braided or woven filaments extending down at least a portion of a length of an elongate body of the catheter, and the second conductive layer extends coaxial to the first. The conductive layers are insulated by a flexible insulating material, and the first and second conductive layers are configured to prevent EMI arising from the first and second conductive layers at high voltages and rapid pulse rates when applying a plurality of electrical pulses having an amplitude of 1 kV or more through the layers.
Claims Coverage
The provided partial content contains two independent claims, directed to distal bipolar delivery with coaxial braided or woven conductive layers for EMI prevention, and to delivering pulsed power by connecting a high-voltage connector to coaxial insulated conductive layers configured to prevent EMI at high voltages and rapid pulse rates. Across the independent claims, the core inventive structure is the coaxial two-layer catheter conductive system with EMI prevention.
Distal bipolar pulse delivery through coaxial braided/woven conductive layers configured to prevent EMI
A method of treating tissue comprising applying a plurality of electrical pulses having an amplitude of greater than 0.1 kV to a proximal end of a catheter inserted into a body of a subject through a first conductive layer formed from a first plurality of braided or woven filaments and through a second conductive layer extending coaxial to the first conductive layer, and delivering the plurality of electrical pulses to the body from a first electrode at a distal end region in electrical communication with the first conductive layer and a second electrode at the distal end region in electrical communication with the second conductive layer, wherein the first and second conductive layers are configured to prevent electromagnetic interference (EMI) arising from the first and second conductive layers at high voltages and rapid pulse rates.
High-voltage connector delivery through insulated coaxial conductive layers configured to prevent EMI
A method of delivering pulsed power to a catheter comprising connecting a high-voltage connector to a first conductive layer and a second conductive layer of the catheter, the first conductive layer formed from one or more braided or woven filaments extending down at least a portion of a length of an elongate body of the catheter, the second conductive layer extending coaxial to the first conductive layer, and applying a plurality of electrical pulses having an amplitude of 1 kV or more from the high-voltage connector through the first and second conductive layers, wherein the first and second conductive layers are insulated by a flexible insulating material and configured to prevent electromagnetic interference (EMI) arising from the first and second conductive layers at high voltages and rapid pulse rates.
Claim coverage centers on delivering high-voltage, rapid pulse electrical energy using a catheter with two coaxial conductive layers formed from braided or woven filaments, where the conductive layers are insulated by a flexible insulating material and configured to prevent electromagnetic interference (EMI) at high voltages and rapid pulse rates. One independent claim further specifies treating tissue by delivering pulses via first and second distal electrodes in electrical communication with the respective conductive layers.
Stated Advantages
Prevention of electromagnetic interference (EMI) arising from the first and second conductive layers at high voltages and rapid pulse rates.
Documented Applications
No documented applications found
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