Surgery – Instruments – Electrical application
Reexamination Certificate
2007-09-18
2007-09-18
Peffley, Michael (Department: 3739)
Surgery
Instruments
Electrical application
C606S048000
Reexamination Certificate
active
10068533
ABSTRACT:
Apparatus and methods for ablating, severing, cutting, shrinking, coagulating, or otherwise modifying a target tissue to be treated. In a method for treating a target tissue, an active electrode of an electrosurgical probe is positioned in at least close proximity to the target tissue in the presence of an electrically conductive fluid. A high frequency voltage is then applied between the active electrode and a return electrode, wherein, the high frequency voltage is sufficient to volumetrically remove (ablate), sever, or modify at least a portion of the target tissue. The probe comprises a multi-lumen shaft having a plurality of internal lumens, and a return electrode coil oriented substantially parallel to the shaft distal end. The active electrode may be in the form of a metal disc, a hook, or an active electrode coil. In the latter embodiment, the active electrode coil is typically arranged substantially orthogonal to the return electrode coil. Methods of making an active electrode coil, a return electrode coil, and an electrosurgical probe are also disclosed.
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Dahla Robert H.
Woloszko Jean
ArthoCare Corporation
Batt Richard R.
Peffley Michael
Szymczak Brain E.
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