Gyrus Medical Limited

Robert J Brewer

Robert C Humble

Michael David Newton

David Morris

Edwin Lyons

Douglas J Rose-Innes

Robert E Gadsden

David W Morris

An electrosurgical system is provided for the treatment of tissue, the system comprising an electrosurgical generator () and an instrument () comprising an instrument shaft () having a longitudinal axis, and an electrode assembly () at one end of the shaft. The electrode assembly () comprises a first tissue treatment electrode (), a second tissue treatment electrode (), and first and second return electrodes () electrically insulated from the first and second tissue treatment electrodes by means of insulation members (). The first and second tissue treatment electrodes () each have an exposed surface for treating tissue, the exposed surface of the first tissue treatment electrode () being such as to treat tissue disposed on the longitudinal axis, and the exposed surface of the second tissue treatment electrode () being such as to treat tissue disposed laterally of the longitudinal axis. The instrument has a first set of connections (A,C) by which the first tissue treatment electrode () can be placed in circuit with the first return electrode () such that, in use, a current path is established between the first tissue treatment electrode () and the first return electrode (). The instrument has a second set of connections (B,D) by which the second tissue treatment electrode () can be placed in circuit with the second return electrode () such that, in use, a current path is established between the second tissue treatment electrode () and the second return electrode ().

Electrosurgical system

An electrosurgical instrument is provided for the treatment of tissue, the instrument comprising an instrument shaft () having a longitudinal axis, and an electrode assembly at one end of the shaft. The electrode assembly comprises a first tissue treatment electrode (), a second tissue treatment electrode (), and a third electrode () which is electrically insulated from the first and second tissue treatment electrodes by means of an insulation member (). The first and second tissue treatment electrodes () each have an exposed surface for treating tissue, the exposed surface of the first tissue treatment electrode () being such as to treat tissue disposed on the longitudinal axis, and the exposed surface of the second tissue treatment electrode () being such as to treat tissue disposed laterally of the longitudinal axis. The instrument has a first set of connections (A,B) by which the first tissue treatment electrode () can be placed in circuit with the second electrode () such that, in use, a current path is established therebetween. The instrument has a second set of connections (B,C) by which the second tissue treatment electrode () can be placed in circuit with the third electrode () such that, in use, a current path is established therebetween.

Electrosurgical instrument with longitudinal and lateral action

An articulated surgical instrument includes a handle, an actuating assembly associated with the handle, and a shaft including a proximal end coupled to the handle, a deflectable portion and an end effector. Distal portions of deflection wires are connected to the shaft. Proximal portions of the wires are connected to the actuating assembly. Movement of the actuating assembly moves the deflection wires to cause a deflection of the deflectable portion. The actuating assembly includes one or more actuators and one or more slider members associated with the actuators and connected to the deflection wires. The slider members are movable linearly between first and second positions, the proximal portions of the deflection wires being connected to the slider members. One of the actuators and slider members has a cam track and the other has a cam follower, such that movement of an actuator by the user of the instrument causes a linear movement of a slider member from its first position to its second position, so as to move the deflection wires causing a corresponding deflection of the deflectable portion.

Surgical instrument

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Newport, United Kingdom

Robert J Brewer