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US 2012/0239024 A1Published application
Energy-Based Ablation Completion Algorithm
AssigneeVivant Medical, Inc.
InventorsCasey M. Ladtkow, Joseph D. Brannan
Life of this patent
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Abstract
An electrosurgical generator is disclosed. The generator includes sensor circuitry configured to measure voltage and current delivered to tissue and a controller configured to measure time of energy delivery to tissue and to calculate energy delivered to tissue, the controller further configured to estimate a size of an ablation volume as a function of energy delivered to tissue and time and to calculate a growth rate of the ablation volume based on the estimated size.
Claims15
An electrosurgical generator, comprising:
- sensor circuitry configured to measure voltage and current delivered to tissue;
- and
- a controller configured to measure time of energy delivery to tissue and to calculate energy delivered to tissue, the controller further configured to estimate a size of an ablation volume as a function of energy delivered to tissue and time and to calculate a growth rate of the ablation volume based on the estimated size.
A method for ablating tissue, comprising:
- measuring time of energy delivery to tissue;
- calculating energy delivered to tissue based on measured voltage and current;
- estimating a size of an ablation volume as a function of energy delivered to tissue and time;
- and
- calculating a growth rate of the ablation volume based on the estimated size.
2 more elements
A method of ablating tissue, comprising:
- applying at least one electrosurgical waveform to tissue in a pulsitile manner;
- measuring reactive impedance of the tissue;
- measuring time of energy delivery to tissue;
- determining peaks of the reactive impedance corresponding to the pulses of the at least one electrosurgical waveform;
- calculating a growth rate of the ablation volume based on the estimated size.
2 more elements
Dependencies are inferred from the claim text.