US 11,911,092 B2
Electrode instrument and resectoscope, protected against short circuit
Christian Brockmann, Hollenstedt (DE); and Christoph Knopf, Lübeck (DE)
Assigned to OLYMPUS WINTER & IBE GMBH, Hamburg (DE)
Filed by OLYMPUS WINTER & IBE GMBH, Hamburg (DE)
Filed on Jul. 31, 2020, as Appl. No. 16/944,947.
Claims priority of application No. 10 2019 121 674.5 (DE), filed on Aug. 12, 2019.
Prior Publication US 2021/0045800 A1, Feb. 18, 2021
Int. Cl. A61B 18/14 (2006.01); A61B 18/12 (2006.01); A61B 18/00 (2006.01)
CPC A61B 18/149 (2013.01) [A61B 18/1206 (2013.01); A61B 2018/00083 (2013.01); A61B 2018/126 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A bipolar electrode instrument for use in a resectoscope, the electrode instrument including:
a first conductor that extends through an elongated shaft section and being configured to form a working electrode at a distal-most end of the electrode instrument, the working electrode configured to receive a high-frequency current;
a second conductor extending through the shaft section and forming a counter electrode at a distal end region of the electrode instrument such that the counter electrode is provided proximally of the working electrode, wherein:
the working electrode and the counter electrode are spatially separated such that a distance between the working electrode and the counter electrode cannot be bridged by a straight conductor having a length of 6 mm or less;
an insulator arranged spatially between the working electrode and the counter electrode, the insulator intersecting all possible straight connecting lines between the working electrode and the counter electrode that are 6 mm or less in length; and
a support arm configured to carry the working electrode, wherein:
a central axis of the working electrode is coincident with a central axis of the support arm and intersects with a central axis of the counter electrode.