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公开(公告)号：US09636165B2
公开(公告)日：2017-05-02
申请号：US14181114
申请日：2014-02-14
Applicant: COVIDIEN LP
Inventor： Eric J. Larson , Carolyn G. Ford , Alexander M. Waskiewicz
CPC classification number: A61B18/1233 , A61B18/1442 , A61B18/16 , A61B2018/00577 , A61B2018/00607 , A61B2018/00875
Abstract: The electrosurgical systems and methods of the present disclosure include a tissue resistance measurement system that compensates for capacitive parasitics in a cable connecting an electrosurgical generator to and electrosurgical cable to estimate the real resistance of a tissue load. The electrosurgical generator includes an output stage coupled to an electrical energy source and generates electrosurgical energy. The electrosurgical generator includes a plurality of sensors sensing a voltage and current of the electrosurgical energy and a controller controlling the output stage. The controller includes a calculator that calculates a real part of an impedance based on the sensed voltage and current, an estimator that estimates a resistance of the tissue using a solution to a quadratic equation that is a function of the real part of the impedance, and a control signal generator configured to generate a control signal for the output stage based on the resistance of the tissue.
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公开(公告)号：US11246644B2
公开(公告)日：2022-02-15
申请号：US16356230
申请日：2019-03-18
Applicant: COVIDIEN LP
Inventor： Joe D. Sartor , Arlen K. Ward , John A. Hammerland, III , Eric J. Larson , Patrick J. Digmann
Abstract: A surface ablation system includes an electrosurgical generator, and elongated shaft, a plug, and a circuit assembly. The elongated shaft includes a proximal end portion and a distal end portion. The plug is supported on the distal end portion of the elongated shaft. The circuit assembly is supported on the plug and in electrical communication with the electrosurgical generator. The circuit assembly includes spaced-apart traces positioned in arrays about the plug. Each of the traces is configured to emit electrosurgical energy along the arrays to treat tissue positioned adjacent to the traces.
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公开(公告)号：US09655670B2
公开(公告)日：2017-05-23
申请号：US14180965
申请日：2014-02-14
Applicant: COVIDIEN LP
Inventor： Eric J. Larson , Carolyn G. Ford , Alexander M. Waskiewicz
CPC classification number: A61B18/1233 , A61B18/1442 , A61B18/16 , A61B2018/00577 , A61B2018/00607 , A61B2018/00875
Abstract: The electrosurgical systems and methods of the present disclosure include a tissue resistance measurement system that compensates for capacitive parasitics in a cable connecting an electrosurgical generator to and electrosurgical cable to estimate the real resistance of a tissue load. The electrosurgical generator includes an output stage coupled to an electrical energy source and generates electrosurgical energy. The electrosurgical generator includes a plurality of sensors sensing a voltage and current of the electrosurgical energy and a controller controlling the output stage. The controller includes a calculator that calculates a real part of an impedance based on the sensed voltage and current, an estimator that estimates a resistance of the tissue using a solution to a quadratic equation that is a function of the real part of the impedance, and a control signal generator configured to generate a control signal for the output stage based on the resistance of the tissue.
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