1. Product overview
Transcranial electrical stimulator is a non-invasive technology that uses constant, low-intensity current (0-2mA) to modulate nerves. The current is delivered to the designated brain area through electrodes, and the intracranial current will increase or decrease the neuron cell's activation. Excitability (depending on the polarity of the electrodes), increased or decreased excitability can cause changes in brain function that can be used to treat disease or study brain function.
2. Performance Specifications
2.1 Stimulation mode
a) tDCS transcranial direct current stimulation mode.
b) TACS transcranial alternating current stimulation mode.
c) TPCS transcranial pulsed electrical stimulation mode.
d) TRNS transcranial random noise stimulation pattern.
e) CES transcranial microcurrent stimulation mode.
2.2 Carrier waveform
Carrier waveform: direct current stimulation, alternating current (sine wave) stimulation, pulse waveform (square wave) stimulation, transcranial random noise stimulation, transcranial microcurrent stimulation optional
2.3 Output current
Output current intensity range: 0 ~ 2mA, divided into: 0 ~ 0.5mA, 0 ~ 1mA, 0 ~ 1.5mA, 0 ~ 2mA four gears (CES transcranial microcurrent stimulation mode only has 0.5mA gear), and each The current intensity of each gear is continuously adjustable, and the error should not be greater than ±7%.
2.4 Current intensity control
The output intensity of the stimulator can be adjusted. During the stimulation treatment process, the real-time linear adjustment of the output current can be realized by adjusting the buttons. The adjustment range is 0 to 255 levels. The output intensity increases with the increase of the number of levels. Above 10uA, the upper limit of the output current depends on the maximum current gear set before stimulation.
2.5 Output current display
There should be real-time display of the output current, the range: 0 ~ 2mA, the error should not be greater than ± 7%.
2.6 Operating frequency
a) tDCS transcranial direct current stimulation mode, no frequency.
b) TACS transcranial alternating current stimulation mode, frequency range: 0 ~ 200Hz, continuously adjustable, the error should not be greater than ± 2%.
c) TPCS transcranial pulse electrical stimulation mode, frequency range: 0 ~ 200Hz, continuously adjustable, the error should not be greater than ± 2%.
d) TRNS transcranial random noise stimulation mode, frequency range: random.
e) CES transcranial microcurrent stimulation mode, pulse repetition frequency: 0.1Hz, the error should not be greater than ±2%.
2.7 Pulse width
a) TDCS transcranial direct current stimulation mode without pulse width.
b) TACS transcranial alternating current stimulation mode, unidirectional wave pulse width: 0 ms ~ 500 ms, bidirectional wave pulse width: 0 ms ~ 330 ms, the error should not be greater than ± 10%.
c) TPCS transcranial pulse electrical stimulation mode, pulse width: 0 ms ~ 500 ms, the error should not be greater than ± 10%.
d) TRNS transcranial random noise stimulation pattern, pulse width: random.
e) CES transcranial microcurrent stimulation mode, the pulse width should be composed of four pulses of 250ms, 500ms, 750ms and 1000ms, and the error should not be greater than ±10%.
2.8 Output amplitude value
When the test load impedance is 500Ω, the output amplitude value is not more than 1.5V.
2.9 Contact Impedance
There should be real-time display of contact impedance, impedance range: 500Ω ~ 16KΩ, the error should not be greater than ± 20%.
2.10 Contact Quality
The contact quality should be displayed in real time. When the grid is off, it means that the cathode and anode output lines are open; when the first grid flashes, it means that the cathode and anode output lines are short-circuited. When other grids are always on, it means that the contact is normal.
2.11 One-way/two-way wave
One-way/two-way wave: The stimulation waveform has the function of one-way/two-way waveform switching.
2.12 Pre-stimulation
Pre-stimulation current: During the stimulation process, it first rises to the predetermined current and then drops to 0; the excitation DC current is 1mA, the current error should not be greater than ±10%, the excitation time is 60s, and the time error should not be greater than ±2%, with special pre-stimulation Function key, one key to realize pre-stimulation function.
2.13 Pseudo-stimulation
Pseudo-stimulation: During the stimulation process, first rise to the predetermined current and then drop to 0; the excitation current is 0.5mA, the current error should not be greater than ±10%, the excitation time is 60s, the time error should not be greater than ±2%, with a dedicated pseudo-stimulation function Press the button to realize the pseudo-stimulation function with one button.
2.14 Security protection function
Safety protection function: One-key stop treatment, it is required to stop the current output at any time during the stimulation process without turning off the power supply.
2.15 Battery indicator
The stimulator has a real-time indication of battery level.
2.16 Power supply voltage fluctuation
The influence of power supply voltage fluctuation ±10% on the output amplitude and frequency of the stimulator should not be greater than ±5%.
2.17 Timing function
The stimulator should have an output timing function, the timing range is 1 to 100 minutes, and the error should not be greater than ±2%.
2.18 Continuous working time
The stimulator can work continuously for no less than 4 hours.
2.19 Output current stability
The rate of change of output current under different loads should not be greater than 10%.
2.20 Open circuit voltage
The open circuit voltage of the stimulator should not be greater than 40V.
2.21 Output DC component
When the stimulator is at maximum output, the DC component is less than 2V.
2.22 Output blocking
The stimulator has no energy output when the amplitude control is preset to the minimum position; when the power supply is restored after a power interruption, there is no energy output.
2.23 Pulse energy
According to the requirements of YY 0607-2007, the energy of each pulse is ≤300mJ under the load resistance of 500Ω;
2.24 Current density of electrode sheet
The current density of the electrode sheet should not be greater than 2 mA (r.m.s)/cm2; if it is greater than it needs to be explained in the manual, and special attention should be paid to the reminder.
2.25 Electrodes and electrode leads should meet the requirements of YY 0868-2011 "Electrodes for Nerve and Muscle Stimulators".
2.26 Electrode size specification
The length x width x thickness dimensions of the 2-channel electrode are: 60x45x1.4mm, and the error should not exceed the nominal ±10%.
3. Scope of application
This product is suitable for the treatment of motor dysfunction, language cognitive impairment, and swallowing disorders caused by brain injury.