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1. (WO1998015230) IMPROVED LOOP ELECTRODES FOR ELECTROCAUTERY PROBES FOR USE WITH A RESECTOSCOPE

Pub. No.:    WO/1998/015230    International Application No.:    PCT/US1997/018154
Publication Date: Apr 16, 1998 International Filing Date: Oct 7, 1997
IPC: A61B 18/14
Applicants: SYMBIOSIS CORPORATION
Inventors: HAHNEN, Kevin, F.
BEIDEMEN, Tracie, L.
Title: IMPROVED LOOP ELECTRODES FOR ELECTROCAUTERY PROBES FOR USE WITH A RESECTOSCOPE
Abstract:
An electrocautery probe (112) includes a distal loop electrode (222) mounted between a pair of arms (223, 225) which are joined at their proximal ends to an electrode lead (227), and a mounting sleeve (229) for slide coupling the probe to the guide tube of a resectoscope. The arms are skewed from a longitudinal axis defined by the electrode lead and are covered with an insulation material (231, 233) which extends to the distal end of the arms, and terminates in a straight edge parallel to a plane substantially perpendicular to the arms. The loop electrode is angled approximately 25 proximally to 35 proximally relative to a plane substantially perpendicular to the electrode lead. The loop electrode further defines sharp upper distal and proximal edges (226a, 226b). A cross section of the electrode further defines an upper surface (224a), a leading distal surface (224b), a lower distal surface (224c), and a lower proximal surface (224d).