Ring Electrode

A metal ring electrode on a bipolar lead, which usually serves as a bipolar pacemaker’s indifferent electrode
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During the cleaning process the wire is pulled through the armature and an arc burns between the wire and the ring electrode.
By using a conic ring electrode it was possible to stabilise the position of the arc by regulate the inert gas speed.
NeuroMetrix obtained regulatory clearance for three UNIVERSAL Electrodes: the UNIVERSAL Stimulator Bar Electrode for peripheral nerve stimulation, and the UNIVERSAL Tab and Ring Electrode Sets for recording of motor and sensory responses from peripheral nerves.
True bipolar designs, like the TVL(R)-ADX lead, use a small ring electrode instead of the shock coil, which may improve sensing performance.
To make the sample ions enter the mass spectrometer scientists used the technology of electrodynamic ion funnel-a series of conductive, progressively smaller electric ring electrodes that efficiently pull in and focus more ions into the mass spectrometer than without the funnel.
Germany's University of Wuppertal has redesigned the electric cells used in MS by replacing ring electrodes with a cylindrical series, thereby reducing the crosstalk current.
The QuickFlex leads, used in CRT (cardiac resynchronization therapy), feature shorter tip and ring electrodes (used to conduct energy), reducing the length of the lead's rigid portions.