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EN109-1498751-47 IFU
A specific feature of this type of muscle stimulation is that the alternating current is interrupted 50
times per second. This results in a
pulse train, comparable to the ‘burst’ in TENS. The total duration of
the pulse train is 20 ms, giving a phase duration/phase interval ratio of 1:1. Kots uses a Burst
frequency of 50 Hz, approximately in the middle of the frequency spectrum used to produce tetanic
contraction (40-80 Hz). In addition to the 1:1 ratio, Kots also describes a phase duration/phase interval
ratio of 1:5.
The amplitude should be increased until a powerful contraction is produced (from the motor
stimulation level up to the limit of tolerance). As with all muscle stimulation applications a Surge
program can be used, allowing the muscles to rest between exercise cycles.
Parameters:
•
Carrier Frequency
, expressed in Khz, is the base frequency of the alternating current.
•
Burst Frequency
, expressed in kHz, is the base frequency of the alternating current.
•
Burst / Interval Ratio
, defines the ratio of the burst length to the interval between the bursts. The
sum of the burst and interval duration is the reciprocal of the burst frequency i.e. with a burst
frequency set at 50 Hz and a burst / interval ratio of 1:5, the burst duration will be 20 * 1/6 = 3.3
ms and the interval duration will be 20 * 5/6 = 16.7 ms.
•
Surge Program
can be used to adjust repeated sequences of contraction and rest periods.
Micro current
Micro Current is a monophasic rectangular waveform with manually selectable or alternating polarity.
Many therapists prefer Micro Current therapy because of the low current amplitudes used. Alternating
polarity can be used to average out the DC component, thereby reducing the formation of electrolysis
by-products.
Parameters:
•
Frequency
, expressed in Hz, is the number of cycles per second.
•
Alternation mode
defines whether the polarity of the wave is automatically alternating or not.
•
Alternation Period
, expressed in seconds, defines the polarity reversal timing 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.
High voltage
This current type has a twin peak monophasic waveform with a fixed duration of 64 µs between the
two voltage peaks. The amplitude is adjusted in volts rather than in mA. The short rise time and short
duration of each voltage peak (approximately 7 µs) is well suited to nerve stimulation and efficient
discrimination between sensory, motor and pain responses. The very short pulse duration of high
voltage creates a stimulation which is quite comfortable, and one which most patients can tolerate.
The very short pulse duration followed by a very long interpulse interval eliminates the formation of
any appreciable chemical or thermal effects in the tissue. High voltage is used for stimulating nerves
and muscles, causing muscle contractions. Examples for clinical use are to treat acute or chronic pain,
edema absorption and ulcer healing. Muscle contraction or motor response of isolated muscle groups,
superficial or deep, can be easily and comfortably stimulated. The relative comfort and depth of
penetration may be the key for the usefulness of high voltage stimulation in clinical conditions such as
tendon transplants, joint mobilization and muscle re-education.
Parameters:
•
Pulse Frequency
, expressed in Hz or pps (pulses per second), defines the repetition rate of the
twin pulses.
