13
Parameters:
Pulse Frequency
, expressed in Hz or pps (pulses per second), defines the repetition rate of the twin
pulses. See 4.1.4.9 for details.
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. See for the available Modulation programs fig 4.1.4.12.
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. See
paragraph 8.2.5.6 for details. Surge programs are only available in the non alternating mode.
4.1.3.7 Diadynamic Currents
The Diadynamic currents were introduced by Bernard
(2)
and have won a significant position in the history
of European physiotherapy. They are now somewhat unfairly dismissed as outdated when compared with
Interferential currents or TENS. 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.
2 Bernard, Pierre D.
La thérapie diadynamique,
Paris, Editions ‘Physio’, 1962.
CAUTION:
•
Diadynamic currents are monophasic currents that produce electrolysis by-products. These by-
products can result in burns beneath the electrodes. Always use properly moistened sponge /
electrode combinations to absorb these by-products during treatment. See paragraph 7.1.5 for
details.
The following variations are available:
4.1.3.7.1 MF (Monophasé Fixe)
Is a single phase rectified sinusoidal current with a frequency of 50 Hz. See fig 4.1.4.11.1 for details. MF
is a vibrating waveform that easily induces contractions.
4.1.3.7.2 DF (Diphasé Fixe)
Is a dual phase rectified sinusoidal current with a frequency of 100 Hz. See fig 4.1.4.11.2 for details. DF is
usually experienced as a slight vibration. It is a pleasant waveform that is often used as an introduction to
CP or LP.
4.1.3.7.3 LP (Longues Périodes)
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. See fig 4.1.4.11.3 for details. LP is smoother than CP.
4.1.3.7.4 CP (Courtes Périodes)
Is a rapid alternation between one second of MF current and one second of DF current. See fig 4.1.4.11.4
for details. CP has a strong resorbing effect.
Содержание Endomed 482
Страница 1: ...4 Series Operating Instructions ...
Страница 3: ......
Страница 21: ...19 4 1 4 11 3 LP 4 1 4 11 4 CP 4 1 4 11 5 CPid ...