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EN109-1498751-47 IFU
•
Frequency Modulation
, expressed in %, defines a variable frequency range that is subtracted
from the Pulse frequency i.e. when the Pulse frequency is set to 80 Hz and the Frequency
modulation is set to 50%, the final frequency will vary from 40
–
80 Hz.
•
Modulation Program
defines the time and sequence in which the frequency will sweep through
the Frequency modulation range.
•
Alternation Mode
defines whether the polarity of the pulses is automatically alternating or not.
•
Alternation Period
, expressed in seconds, defines the polarity reversal time in the alternating
mode.
•
Surge Program
can be used to adjust repeated sequences of contraction and rest periods. Surge
programs are only available in the non-alternating mode.
Diadynamic currents
Diadynamic currents are monophasic currents that produce electrolysis by-products. These by-
products can result in etching beneath the electrodes. Always use properly moistened sponge /
electrode combinations to absorb these by-products during treatment.
The Diadynamic currents were introduced by Bernard (*) and have won a significant position in the
history of European physiotherapy. Diadynamic currents are mainly used for pain reduction and the
improvement of blood circulation.
Bernard uses the term ‘Diadynamic Current’ to refer to a monophase (MF –
Monophasé Fixe) or
double-phase (DF
–
Diphasé Fixe) rectified alternating current. The frequency was directly derived
from the mains supply, resulting in sinusoidal pulses with a duration of 10ms. This phase time of 10ms
will mainly depolarize thick fibers. Stimulation of thin fibers can only be obtained at higher current
amplitudes.
(*)
Bernard, Pierre D. La thérapie diadynamique, Paris, Editions ‘Physio’, 1962.
The following variations are available:
MF (Monophasé Fixe)
MF is a single phase rectified sinusoidal current with a frequency of 50 Hz. MF is a vibrating waveform
that easily induces contractions.
DF (Diphasé Fixe)
DF is a dual phase rectified sinusoidal current with a frequency of 100 Hz. DF is usually experienced as
a slight vibration. It is a pleasant waveform that is often used as an introduction to CP or LP.
LP (Longues Périodes)
LP is a slow alternation between six seconds of MF current and a six-second DF current. In the DF
phase the intervals between the MF pulses are filled with additional pulses with gradually increasing
and decreasing amplitude. LP is smoother than CP.
CP (Courtes Périodes)
CP is a rapid alternation between one second of MF current and one second of DF current. CP has a
strong resorbing effect.
CPid
CPid is identical to CP, except that the current amplitude during the MF phase is 12.5% lower than
during the DF phase. Normally a lower frequency is experienced to be more aggressive than a higher
frequency. CPid prevents this difference in sensation.
