Surgery – Instruments – Electrical application
Reexamination Certificate
2010-11-01
2011-10-11
Peffley, Michael (Department: 3739)
Surgery
Instruments
Electrical application
C606S049000
Reexamination Certificate
active
08034052
ABSTRACT:
An instrument for tissue ablation 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 includes one or more electrically conductive segments on the electrode and configured to receive electrosurgical energy from the rigid tubular member. An insulation layer is disposed upon the electrode and 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 a semiconductive material coated on the rigid tubular member that forms one or more resistive layers that connects the rigid tubular member with a corresponding electrically conductive segment.
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