Control system and user interface for an ablation system

1 . An electrosurgical generator comprising:

at least two contacts for coupling to one or more electrosurgical probes;

a high voltage power source comprising at least first and second capacitors configured for outputting therapy pulses;

a delivery circuit comprising a plurality of switches configured to route an output from the power source to selected ones of the at least two contacts, the delivery circuit comprising a stack selector;

a controller having stored instructions that can be selected, configured or adjusted by a user, the stored instructions including at least one instruction set for delivering a therapy regimen, the therapy regimen comprising a plurality of pulses each having a pulse amplitude and a pulse width, the instruction set defining the pulse amplitude and the pulse width; and

a user interface having a user operable change tool that the user can actuate during execution of the therapy regimen to modify the pulse amplitude without stopping or interrupting the therapy regimen;

wherein the stack selector comprises a plurality of switches and has each of a first configuration in which all of the capacitors are used for purposes of outputting therapy pulses, and a second configuration in which less than all of the capacitors are used for purposes of outputting therapy pulses; and

further wherein controller is configured to switch the stack selector between the first configuration and the second configuration in response to actuation of the change tool by a user during execution of the therapy regimen.

2 . An electrosurgical generator as in claim 1 , further comprising a first port having a first one of the at least two contacts, and a second port having a second one of the at least two contacts, wherein:

the first port is adapted to receive a first electrosurgical probe; and

the second port is adapted to receive a second electrosurgical probe.

3 . An electrosurgical generator as in claim 1 , further comprising a port having a first contact and a second contact of the at least two contacts, the port adapted to receive an electrosurgical probe.

4 . An electrosurgical generator as in claim 1 wherein the instruction set for delivering the therapy regimen comprises a series of pulses grouped as a burst, the therapy regimen defining how many pulses are in a burst, wherein the controller further comprises an executable triggering instruction set adapted to receive a therapy trigger, identify a therapy window for delivery of a therapy burst from within the therapy regimen relative to the therapy trigger, and instruct the delivery circuit to route a therapy burst to selected contacts of the at least two contacts.

5 . An electrosurgical generator as in claim 1 wherein the instruction set for delivering the therapy regimen comprises a series of pulses grouped as a burst, the therapy regimen defining how many pulses are in a burst, wherein the controller further comprises an executable triggering instruction set adapted to identify a therapy trigger, identify a therapy window for delivery of a therapy burst from within the therapy regimen relative to the therapy trigger, and instruct the delivery circuit to route a therapy burst to selected contacts of the at least two contacts.

6 . An electrosurgical generator as in claim 1 wherein the instruction set for delivering the therapy regimen comprises a series of pulses grouped as a burst, the therapy regimen defining how many pulses are in a burst, further comprising a trigger circuit adapted to sense a representation of a cardiac signal of a patient, identify a therapy window for delivery of a therapy burst from within the therapy regimen, and instruct the delivery circuit to route a therapy burst to selected contacts of the one or more ports.

7 . An electrosurgical generator as in claim 1 wherein the instruction set for delivering the therapy regimen comprises a series of pulses grouped as a burst, the therapy regimen defining how many pulses are in a burst, further comprising a trigger circuit adapted to receive a representation of a cardiac signal of a patient, identify a therapy window for delivery of a therapy burst from within the therapy regimen, and instruct the delivery circuit to route a therapy burst to selected contacts of the one or more ports.

8 . A system for treating a patient by ablation of a target tissue comprising an electrosurgical generator as in claim 1 , and a probe configured for use with the electrosurgical generator.

9 . A method of operating an electrosurgical generator, the electrosurgical generator having at least two contacts for coupling to one or more electrosurgical probes, a high voltage power source comprising at least first and second capacitors configured for outputting therapy pulses, a delivery circuit comprising a plurality of switches configured to route an output from the power source to selected ones of the at least two contacts, a controller having stored instructions that can be selected, configured or adjusted by a user, the stored instructions including at least one instruction set for delivering a therapy regimen, the therapy regimen comprising a plurality of pulses each having a pulse amplitude and a pulse width, the instruction set defining the pulse amplitude and the pulse width, and a user interface;

the method comprising:

receiving an indication to start the therapy regimen;

displaying, on the user interface, a user operable change tool, the user operable change tool configured to be responsive to user actuation during execution of the therapy regimen to modify the pulse amplitude without stopping or interrupting the therapy regimen, wherein the delivery circuit includes a stack selector, the stack selector having a plurality of switches and each of a first configuration in which all of the capacitors are used for purposes of outputting therapy pulses, and a second configuration in which less than all of the capacitors are used for purposes of outputting therapy pulses, the stack selector responsive to the user operable change tool;

with the user operable change tool accessible on the user interface, initiating the therapy regimen using a first therapy amplitude by setting the stack selector to the first configuration;

receiving, at the user interface, an actuation of the user operable change tool; and

continuing the therapy regimen using a second therapy amplitude, without stopping or interrupting the therapy regimen, by setting the stack selector to the second configuration.

10 . A method as in claim 9 , wherein the controller further comprises an executable triggering instruction set adapted to receive a therapy trigger, identify a therapy window for delivery of a pulse from within the therapy regimen relative to the therapy trigger, and instruct the delivery circuit to route the pulse to selected contacts of the at least two contacts, wherein initiating the therapy regimen includes the controller executing the triggering instruction set.

11 . A method as in claim 9 , wherein the controller further comprises an executable triggering instruction set adapted to identify a therapy trigger, identify a therapy window for delivery of a pulse from within the therapy regimen relative to the therapy trigger, and instruct the delivery circuit to route the pulse to selected contacts of the at least two contacts, wherein initiating the therapy regimen includes the controller executing the triggering instruction set.

12 . A method as in claim 9 , wherein the electrosurgical generator includes a trigger circuit adapted to sense a representation of a cardiac signal of a patient, identify a therapy window for delivery of a pulse from within the therapy regimen, and instruct the delivery circuit to route a pulse to selected contacts of the one or more ports, wherein initiating the therapy regimen includes activating the trigger circuit.

13 . A method as in claim 9 , wherein the electrosurgical generator includes a trigger circuit adapted to receive a representation of a cardiac signal of a patient, identify a therapy window for delivery of a pulse from within the therapy regimen, and instruct the delivery circuit to route the pulse to selected contacts of the one or more ports, wherein initiating the therapy regimen includes activating the trigger circuit.