Patent ID: 8852182

Claim:
An electrode assembly comprising: a cannula having: a first coupling assembly with a hub; and an elongated tubular body having a proximal end mounted to said hub of said first coupling assembly and projecting outward to a distal end, first and second spaced apart active contacts disposed adjacent to said distal end, and a first conductive terminal seated in said hub and electrically connected to said second active contact; and a supply electrode assembly having: a supply electrode having a proximal end spaced apart from a distal end, said supply electrode defining a longitudinal axis; a second coupling assembly attached to said proximal end of said supply electrode; and a second conductive terminal attached to said second coupling assembly; said supply electrode is dimensioned to be slidably inserted in said elongated tubular body so as to be positioned to electrically contact said first active contact; said first and second coupling assemblies are configured to releasably interlock such that relative rotational movement between said first and second coupling assemblies is constrained to prevent clockwise and counterclockwise rotation of said supply electrode in said elongated tubular body with respect to said longitudinal axis; and said first and second conductive terminals are collectively positioned so that when said first and second coupling assemblies releasably interlock, said first and second conductive terminals contact each other.