The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 17, 2015
Filed:
May. 30, 2012
Jeffrey R. Unger, Longmont, CO (US);
Ryan C. Artale, Boudler, CO (US);
Joshua A. Keller, Lafayette, CO (US);
Gregory P. Milner, Fort Collins, CO (US);
Kenneth C. Brockmann, Boulder, CO (US);
Alexander M. Waskiewicz, Boulder, CO (US);
Rebecca J. Coulson, Lyons, CO (US);
Jessica E. C. Olson, Frederick, CO (US);
Jeffrey R. Unger, Longmont, CO (US);
Ryan C. Artale, Boudler, CO (US);
Joshua A. Keller, Lafayette, CO (US);
Gregory P. Milner, Fort Collins, CO (US);
Kenneth C. Brockmann, Boulder, CO (US);
Alexander M. Waskiewicz, Boulder, CO (US);
Rebecca J. Coulson, Lyons, CO (US);
Jessica E. C. Olson, Frederick, CO (US);
Covidien AG, Neuhausen am Rheinfall, CH;
Abstract
An electrosurgical generator is disclosed. The generator includes an RF output stage configured to supply electrosurgical energy to tissue via at least one active electrode configured to apply electrosurgical energy to tissue; sensing circuitry configured to measure impedance of tissue; and a controller. The controller is configured to determine occurrence of a tissue reaction as a function of a minimum impedance value and a predetermined rise in impedance, wherein tissue reaction corresponds to a boiling point of tissue fluid; generate a target impedance trajectory as a function of measured impedance and desired rate of change based on the tissue reaction determination, wherein the target impedance trajectory includes a plurality of target impedance values; and drive tissue impedance along the target impedance trajectory by adjusting the output of the electrosurgical generator to substantially match tissue impedance to a corresponding target impedance for at least a predetermined minimum time period.