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(5) Select the size of the electrodes according to the area of treatment following
the principle:
A larger electrode area usually makes treatment for the patients more pleasant.
(6) Plug the plate electrodes into the well-moistened electrode covers and attach
them to the patient. To moisten viscose covers use tap water or sodium
chloride solution (1%). Make sure that the whole electrode area is fixed tightly
to the skin with the padded side of the electrode cover.
If you use adhesive electrodes, attach them to the patient. Use only electrodes
that stick well, i.e. with the whole area!
Caution
It is not permissible to exceed an effective current density of 2
mAs/cm²!
Pay particular attention, when using current forms with a high
galvanic component (G, UR, IG 30, T/R with pulse lengths above
50 ms and accompanied by pauses below 200 ms), that the
recommended intensity of 0.1 mA/cm
surface area is not exceeded.
If you use electrodes of various different sizes during a treatment, the
smaller of the two electrodes, the so-called "active electrode", is
always decisive when measuring the intensity.
For additional information on type, size and application of the electrodes, see the
supplied therapy booklet
4.4.1 Modes of Attaching the Electrodes
Bipolar
Here you must use two electrodes of equal size.
This is the most common mode especially for pain therapy and circulatory
stimulation.
Unipolar
Preferably used when treating small areas, e.g. nerve and muscle stimulation points,
especially on the hands or in the face.
This therapy mode includes using two electrodes of different size, with the bigger
(indifferent) one being fixed proximally in most cases. The size of the indifferent
electrode must be big enough not to stimulate any more (size = two to three times).
A punctiform electrode is mostly used as small (different) electrode.
4.5
Therapy using Low-frequency Current Modes
4.5.1 Monophase and Biphase Current Modes
The majority of low-frequency current modes for pain therapy, circulatory
stimulation, detonisation and mobilisation can be applied in their basic monophase
as well as biphase mode. If this option exists, the following selection is displayed in
the menu of the respective current mode:
vocaSTIM
-
Master
®
Area of electrodes as small as necessary but as large as possible
Short Introduction to Electrotherapy
2
of active electrode
.
Therapy
.
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