Gyrus Acmi, Inc.

Gyrus Medical Limited

Wayne Williams

Kester Julian Batchelor

Lewis Jones

Maureen D Busche

Riyad Moe

Teo Heng Jimmy Yang

Francis Amoah

Marno Nagtegaal

Frank Breitsprecher

Anh Tri La

Robert Edward Taylor

Jack Dunkley

Apparatus and associated methods relate to controlling electrical power of an electrotherapeutic signal that is provided to a biological tissue engaged by an electrosurgical instrument during a medical procedure. Electrical power—a product of a voltage difference across and an electrical current conducted by the engaged biological tissue—is controlled according to a therapeutic schedule. The electrotherapeutic schedule can be reduced or terminated in response to a termination criterion being met. In some examples, the termination criterion is a current characteristic, such as, for example, a decrease in current conducted by the engaged biological tissue. In some examples, the termination criterion is a biological tissue resistance characteristic, such as, for example, an increase in the biological tissue resistance that exceeds a predetermined delta resistance value.

Power-controlled waveform in electrosurgical systems

Staged impedance values to control thermal margins in electrosurgical systems

A bipolar surgical instrument () comprises a body (), first and second opposed jaws () located at the distal end of a shaft (), the first jaw () being movable with respect to the second jaw () between an open position in which the first and second jaws () are spaced apart from one another, and a closed position in which the first and second jaws () are adjacent one another. The first and second elongate jaw members () have respective first and second electrodes. A controller is operable to determine a mode of operation depending upon a measurement of impedance between the first and second jaws.

Bipolar electrosurgical instruments

Terminating drying cycles by monitoring current in electrosurgical systems

Evaluation of consumed energy in electrosurgical systems

A bipolar surgical instrument comprises a body, first and second opposed jaws located at the distal end of a shaft, the first jaw being movable with respect to the second jaw between an open position in which the first and second jaws are spaced apart from one another, and a closed position in which the first and second jaws are adjacent one another. The first and second elongate jaw members have respective first and second electrodes. A controller is operable to determine a starting voltage for application to the jaws.

Terminating drying cycles by monitoring impedance in electrosurgical systems

A bipolar surgical instrument comprises a body, first and second opposed jaws located at the distal end of a shaft, the first jaw being movable with respect to the second jaw between an open position in which the first and second jaws are spaced apart from one another, and a closed position in which the first and second jaws are adjacent one another. The first and second elongate jaw members have respective first and second electrodes. A controller is operable to detect a short circuit between the first and second electrodes when in use.

Incremental adjustment of a control parameter as a function of a monitored variable in electrosurgical systems

Open circuit check in electrosurgical systems

A bipolar surgical instrument comprises a body first and second opposed jaws located at the distal end of a shaft, the first jaw being movable with respect to the second jaw between an open position in which the first and second jaws are spaced apart from one another, and a closed position in which the first and second jaws are adjacent one another. The first and second elongate jaw members have respective first and second electrodes. A controller is operable to determine a boiling point for tissue between the jaws using a measure of impedance therebetween.

Apparatus and associated methods relate to controlling electrical power of an electrotherapeutic signal that is provided to a biological tissue engaged by an electrosurgical instrument during a medical procedure. Electrical power&#x2014;a product of a voltage difference across and an electrical current conducted by the engaged biological tissue&#x2014;is controlled according to a therapeutic schedule. The electrotherapeutic schedule can be reduced or terminated in response to a termination criterion being met. In some examples, the termination criterion is a current characteristic, such as, for example, a decrease in current conducted by the engaged biological tissue. In some examples, the termination criterion is a biological tissue resistance characteristic, such as, for example, an increase in the biological tissue resistance that exceeds a predetermined delta resistance value.

Phase angle measurement techniques in electrosurgical systems

Alternate power correction outputs in electrosurgical systems

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Penarth, United Kingdom

Wayne Williams