neuroConn DC-Stimulator, User Manual

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Chapter 4 - Operating Basics
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The electrodes therefore need to provide the following conditions to keep the current density
low:
- sufficient surface area,
- low impedance, i.e. appropriate material and good skin contact.
Furthermore, the electrode material must be resistant to electrochemical processes that
occur during long term DC currents, especially for metal-to-body reactions at the transition
from skin to electrode. Non-metallic electrodes must be used, e.g. conductive rubber
electrodes inside a sponge soaked with physiological salt solution.
Dampening of the sponges has to be done in an adequate distance of the DC-
STIMULATOR (more than 1 m). The device must not get in contact with liquid
spills, it might get damaged.
If you use sponges you must not insert the rubber electrodes in a dry sponge. If
so the rubber electrode can be damaged. The manufacturer assumes no liability
for damages in this case. Always use a damp sponge when insert the electrode.
Never use tap water to wet the sponges or the skin before or during the
stimulation. This might result in skin burns! Always use 0,9 % NaCl solution!
The manufacturer accepts no responsibility for any injury caused by such use.
Before each stimulation look and functionality of the sponge pads have to be
checked!
Cleaning and storing
Cleaning and storing the rubber electrodes
The rubber electrodes are less susceptible to mechanical stress and chemical substances.
However, they should not be overstressed mechanically or thermally.
When required clean the rubber electrodes using clear water.
In general, disinfection of the electrodes beyond normal cleaning is only necessary if people
from high-risk groups (e.g. drug users) are in contact with it. In this case, the careful use of a
common disinfection product (mind the instructions of use) or 90 % alcohol is