24
Duodynator
gbo Medizintechnik AG
Version 1.2
Warning!
Do not apply the electrodes on skin injuries. Even minor abrasions
can cause a burning to the patient. Herewith the intensity of current
by the patient can be erroneously judged. If this cannot be avoided,
apply zinc ointment to cover.
The electrodes must
adhere completely to the skin
in order to
avoid
excessive local current density
. Otherwise erythemas, and
sometimes even
burns may occur
.
Current densities exceeding 2 mA/cm² require the special attention
to the operator.
It is recommended not to exceed the current density of 0,2 mA/cm
2
in case of galvanization and 0.1 mA/cm
2
in case of iontophoresis.
If currents with galvanic portions are used special attention have to
be kept. Keep care that the electrode sponges are always moistened
very good.
Do not use one way (self adhesive) electrodes in case of currents
with galvanic portion, there is the danger of acid burns!!
Pieces of jewellery and glasses have to be taken off during the
treatment.
5.2
Single-pole electrodes
Single-pole electrodes are applicable for all therapy currents. For large-area treatment
we recommend to use large plate or conductive rubber electrodes. Both electrode
types have to be connected to the device with a patient cable. The electrode
positioning is realized as described in chapter 5.1.
The electrode size depends on the area that should be passed by the current. Under
small electrodes the current flow will be more concentrated and more localized than
when applying large electrodes. The application area depends on the clinical picture.
Electrode
Surface
Maximum current / Galv /
iontophoresis
Rubber electrodes 8 cm x 12 cm
96 cm2
192 mA
19.2
9.6
Rubber electrodes 11.5 cm x 17.5 cm
201 cm2
400 mA
40
20
Table 1: Maximum currents (rms) for Rubber electrodes