Performa
™
Professional Series
- 17 -
BIPHASIC (RAAS)
Rapid Agonist Antagonist Sequencing (RAAS) is proposed to mimic
muscle-firing patterns of healthy individuals. It uses the electrical
stimulation of sensory and motor nerves to achieve a skeletal muscle
contraction using an electromyogram — derived functional pattern.
It is used extensively for neuromuscular reeducation and treatment of
muscle disuse atrophy.
PARAMETERS:
Phase Duration
Expressed in μs, is the time it takes to
complete one phase of a pulse. The length
affects the type of nerve recruited.
Frequency
In a pulsed current, the Frequency refers to
the number of pulses that occur in a one
second period of time and is denoted in (Hz)
or Pulses Per Second (pps).
Burst Duration
The time elapsed from the beginning to the
end of one burst, and is denoted in (ms)
Pattern Frequency
The Pattern Frequency refers to the num-
ber of the sequential pulse train pattern be
repeated in a one second period of time and
is denoted in (Hz).
Stimulator Output Parameters
RAAS Asymmetrical/Symmetrical Biphasic
Output Mode
Electrodes
Mode selection
CC (Constant Current) or CV (Constant voltage)
Intensity
CC: 0 – 200mA, Stepping 0.5mA;
CV: 0 – 200V, Stepping 0.5V
Phase Duration
20μs – 1,000μs, Stepping 5μs
Frequency
1 – 250 Hz, Stepping 1 Hz
Burst Duration
100ms – 5,000ms, Stepping Adaptive
Pattern Frequency
0.7 Hz (Burst Duration 100ms-500ms)
0.3 Hz (Burst Duration 500ms-1,000ms)
0.15 Hz (Burst Duration 1,000ms-2,000ms)
0.07 Hz (Burst Duration 2,000ms-5,000ms)
Treatment Time
1 – 60 Minutes
Waveform Specifications
Burst Duration
Phase Duration
Ch 1
Ch 2
