Apparatus and method for electrode thermosurgery

Surgery – Instruments – Electrical application

Reexamination Certificate

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C606S049000

Reexamination Certificate

active

07846158

ABSTRACT:
An electrosurgical instrument for use with a source of electrical energy to ablate tissue in a living subject is provided. The instrument includes an elongated tissue-penetrating electrode including a rigid tubular member having a closed distal end defining an interior cavity extending from the closed distal end to a proximal end of the rigid tubular member. The rigid tubular member defines an electrically conductive surface capable of receiving electrical energy from the source of electrical energy. The instrument further includes at least one electrically conductive segment located on the electrode, the segment being configured to receive locally controlled electrosurgical energy from the rigid tubular member. An insulation layer is disposed upon the elongated tissue-penetrating electrode. The layer defines an exposed portion of the electrode at the distal end. The instrument also includes at least one sensor that detects a temperature during ablation and at least one transistor that connects the rigid tubular member with the at least one electrically conductive segment.

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