Enraf Nonius 1600905, User Manual

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1600751-4D
CAUTION:
•
The Direct Galvanic Current is a monophasic current that produces 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 10.1.5 for details.
4.3.9.b MF Interrupted Galvanic Current
The medium frequency interrupted galvanic current is a monophasic rectangular waveform with
a pulse frequency of 8000 Hz and a duty cycle of 90%. See fig 13.10.2 for details. As opposed
to direct galvanic current, the pulsed waveform provides increased patient comfort.
CAUTION:
•
The MF interrupted galvanic current is a monophasic current that produces 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 10.1.5 for details.
4.3.10 Faradic Rectangular or Triangular pulsed current
Faradic currents are often used for muscle stimulation applications that are based on prior
diagnostics. See fig 12.8.1 and 12.8.2 for the current waveforms. The diagnostic objective is to
obtain information on the sensitivity of the neuromuscular apparatus to electrical stimulation.
This gives an indication of the degree of denervation of the muscle tissue. With this technique
the relationship between the current amplitude and phase duration of a rectangular and
triangular pulse is plotted in a strength/duration curve. The strength/duration curve is recorded
by observing the current amplitude required at various phase duration values (ranging from 0.01
to 1000ms) that produce a just perceptible (i.e. just visible or palpable) contraction of a muscle
or muscle group. The values observed can be plotted on graph paper with a logarithmic scale.
In the case of reduced or absent sensitivity to electrical stimulation, the strength/duration curve
gives an indication of the current waveform, phase duration and current amplitude of the
electrical stimulus to be used in any therapy that may be applied.
CAUTION:
•
Faradic 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 10.1.5 for details.
Parameters:
Phase Duration , expressed in ms or s, is the elapsed time from the beginning to the
termination of the pulse phase. See fig 12.8.1 and 12.8.2 for details.
Phase Interval , expressed in ms or s, is the elapsed time between succeeding pulse phases.
See fig 12.8.1 and 12.8.2 for details.
Surge Program can be used to adjust repeated sequences of contraction and rest periods. See
paragraph 10.2.9 for details.