TISSUE ABLATION USING PULSE MODULATED RADIO FREQUENCY ENERGY
First Claim
1. A method of treating tissue within a patient, comprising:
- delivering ablation energy to the tissue;
sensing a physiological parameter indicative of change in moisture concentration of the tissue; and
alternately pulsing the ablation energy on and off to generate an energy pulse train, wherein the ablation energy is pulsed on if the sensed physiological parameter crosses a threshold value indicative of an increase in the moisture concentration, and is pulsed off if the sensed physiological parameter crosses a threshold value indicative of a decrease in the moisture concentration.
1 Assignment
0 Petitions
Accused Products
Abstract
Tissue ablation systems and methods are provided. Ablation energy (e.g., radio frequency energy) is delivered to the tissue and a physiological parameter (e.g., impedance and/or temperature) indicative of a change in moisture concentration of the tissue is sensed. The ablation energy is alternately pulsed on and off to generate an energy pulse train, with the ablation energy being pulsed on if the sensed physiological parameter crosses a threshold value indicative of an increase in the moisture concentration, and being pulsed off if the sensed physiological parameter crosses a threshold value indicative of a decrease in the moisture concentration.
26 Citations
42 Claims
-
1. A method of treating tissue within a patient, comprising:
-
delivering ablation energy to the tissue; sensing a physiological parameter indicative of change in moisture concentration of the tissue; and alternately pulsing the ablation energy on and off to generate an energy pulse train, wherein the ablation energy is pulsed on if the sensed physiological parameter crosses a threshold value indicative of an increase in the moisture concentration, and is pulsed off if the sensed physiological parameter crosses a threshold value indicative of a decrease in the moisture concentration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method of treating tissue within a patient, comprising:
-
delivering ablation energy to the tissue; sensing a change in a physiological parameter of the tissue; and alternately pulsing the ablation energy on and off to generate an energy pulse train, wherein the ablation energy is pulsed on when the sensed physiological parameter drops below a first one or more threshold levels, and is pulsed off when the sensed physiological parameter rises above a second one or more threshold levels. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. An ablation energy generator, comprising:
-
an energy source for outputting ablation energy; and control circuitry configured for receiving a sensed physiological parameter indicative of change in moisture concentration of the tissue, and for alternately pulsing the ablation energy on and off to generate an energy pulse train, wherein the ablation energy is pulsed on if the sensed physiological parameter crosses a threshold value indicative of an increase in the moisture concentration, and is pulsed off if the sensed physiological parameter crosses a threshold value indicative of a decrease in the moisture concentration. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
-
-
32. An ablation energy generator, comprising:
-
an energy source for outputting ablation energy; and control circuitry configured for receiving a sensed physiological parameter, and for alternately pulsing the ablation energy on and off to generate an energy pulse train, wherein the ablation energy is pulsed on when the sensed physiological parameter drops below a first one or more threshold levels, and is pulsed off when the sensed physiological parameter rises above a second one or more threshold levels. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
-
Specification