System and method for ablating a tissue site by electroporation with real-time monitoring of treatment progress
First Claim
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1. A medical system for ablating a tissue site with real-time monitoring during an electroporation treatment procedure, comprising:
- at least two electrodes adapted to be introduced near a target region of a tissue site;
a pulse generator configured to generate and apply between the electrodes a plurality of electroporation pulses for ablation of tissue in the target region, a pre-treatment (PT) test signal having a frequency of at least 1 MHz prior to the treatment procedure and intra-treatment (IT) test signals during the treatment procedure;
a treatment control module adapted to determine impedance values from the PT test signal and IT test signals and to determine a progress of electroporation based on the determined impedance values.
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Abstract
A medical system for ablating a tissue site with real-time monitoring during an electroporation treatment procedure. A pulse generator generates a pre-treatment (PT) test signal having a frequency of at least 1 MHz prior to the treatment procedure and intra-treatment (IT) test signals during the treatment procedure. A treatment control module determines impedance values from the PT test signal and IT test signals and determines a progress of electroporation and an end point of treatment in real-time based on the determined impedance values while the treatment progresses.
805 Citations
24 Claims
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1. A medical system for ablating a tissue site with real-time monitoring during an electroporation treatment procedure, comprising:
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at least two electrodes adapted to be introduced near a target region of a tissue site; a pulse generator configured to generate and apply between the electrodes a plurality of electroporation pulses for ablation of tissue in the target region, a pre-treatment (PT) test signal having a frequency of at least 1 MHz prior to the treatment procedure and intra-treatment (IT) test signals during the treatment procedure; a treatment control module adapted to determine impedance values from the PT test signal and IT test signals and to determine a progress of electroporation based on the determined impedance values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A medical system for ablating a tissue site with real-time monitoring during an electroporation treatment procedure, comprising:
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at least two electrodes adapted to be introduced near a target region of a tissue site of a patient; a pulse generator configured to generate and apply between the electrodes a plurality of electroporation pulses for ablation of tissue in the target region, a pre-treatment alternating current (PT) test signal having a frequency of at least 1 MHz prior to the treatment procedure and a continuous intra-treatment direct current (IT) test signals during the treatment procedure; a treatment control module adapted to determine an impedance value from the PT test signal to establish a baseline impedance value and continuous impedance values from the IT test signals, and to determine an end point of the treatment procedure based on a comparison between the baseline impedance value and the continuous impedance values from the IT test signals. - View Dependent Claims (12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24)
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16. A method of determining a progress of an electroporation treatment procedure for ablating a tissue site comprising:
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applying a pre-treatment (PT) test signal having a frequency of at least 1 MHz to a target region of a tissue site through at least one electrode; determining an impedance value based on the applied PT test signal; applying a plurality of intra-treatment (IT) test signals during the treatment procedure; determining an impedance value for each applied IT test signal; determining a progress of electroporation of the target issue site based on the determined impedance values of the IT test signals and PT test signal.
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Specification