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US 9,956,038 B2Granted
RF or microwave ablation catheter with remote dicke switch
AssigneeCoral Sand Beach LLC
InventorRobert Allison
Life of this patent
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Abstract
The invention provides devices and systems, as well as associated methods of using them, that employ a remote Dicke switching element—i.e., distal to a radiometer. The devices, systems, and methods are suitable for both diagnostic and therapeutic applications in a wide variety of tissues.
Claims12
An ablation system comprising:
- a coaxial cable having a first end, a second end, an inner conductor and an outer conductor;
- a microwave antenna coupled to the first end of the coaxial cable;
- a Dicke switch proximate to the antenna, the Dicke switch coupled to the antenna and coaxial cable, the Dicke switch located between the antenna and coaxial cable, the Dicke switch comprising two diode switches, the diode switches located between the inner conductor and outer conductor;
- a multiplexer coupled to the second end of the coaxial cable, the multiplexer being coupled to the coaxial cable;
- an ablation energy generator, a switch bias source, and radiometer, the radiometer being configured to measure temperature from the antenna, the radiometer coupled to a control of the ablation energy generator;
- and
- circuitry for measuring impedance mismatch, the circuitry coupled to a control of the ablation energy generator.
4 more elements
A method of ablating a biological tissue in need thereof, comprising the steps of:
- placing a microwave antenna of an ablation system proximate to, or in contact with, the biological tissue, wherein the system includes:
- a coaxial cable having a first end, a second end, an inner conductor and an outer conductor;
- the microwave antenna coupled to the first end of the coaxial cable;
- a Dicke switch proximate to the antenna, the Dicke switch coupled to the antenna and coaxial cable, the Dicke switch located between the antenna and coaxial cable, the Dicke switch comprising two diode switches, the diode switches located between the inner conductor and outer conductor;
- a multiplexer coupled to the second end of the coaxial cable, the multiplexer being coupled to the coaxial cable;
- an ablation energy generator, a switch bias source, and radiometer, the radiometer being configured to measure temperature from the antenna, the radiometer coupled to a control of the ablation energy generator;
- and
- circuitry for measuring impedance mismatch, the circuitry coupled to a control of the ablation energy generator, wherein activating the ablation energy generator thereby ablates the biological tissue.
5 more elements
Dependencies are inferred from the claim text.