types of currents
Unidirectional flow of current occurring for more than 1 second.
What is DIRECT CURRENT?
Direct Current modulation used in IONTOPHORESIS?
What is REVERSED DIRECT CURRENT?
It is the sudden departure of short duration of voltage (or current )from a steady value.
What is a PULSE (pl. PULSES)?
A low voltage stimulator output that provides current flows unidirectionally for at least 1 sec or longer
What is DIRECT / GALVANIC CURRENT?
The ability of a substance to resist electric current flow
What is RESISTANCE?
A modulated current where current ceases to flow for 1 sec or longer, then flows again for 1 sec or longer
What is INTERRUPTED DIRECT CURRENT?
Waveform indicated for wound healing?
What is MONOPHASIC?
This is the magnitude of the current (or voltage) deviation from the iso-electric zero value at a given instant in time.
What is INSTANTANEOUS AMPLITUDE?
Monophasic pulsed TENS with a very short phase duration (5-20 microsec) ; characterized by twin peaks pulse.
What is HIGH-VOLTAGE PULSED CURRENT?
Ability of an Object to hold/ store rather than transmit an electrical charge
What is CAPACITANCE?
This current modulation is created when the current is permitted to flow for a few milliseconds and then ceases to flow for a few millisec in repeated cycles.
What is BURST Alternating Current?
Unit of measure for your Phase / Pulse Charge?
What is MICROCOULOMB?
This is the time period extending from beginning to the end of one phase of a pulse
What is PHASE DURATION?
Stimulators in which a continuous sine wave output of 2500Hz is modulated to yield 50 bps.
What is a RUSSIAN CURRENT?
Opposition offered by surface elements to the flow of alternating or direct current
What is IMPEDANCE?
Achieved by using two AC sources that differ in frequency
What is an AMPLITUDE MODULATED ALTERNATING CURRENT?
This is inversely proportional to our PULSE DURATION?
What is FREQUENCY?
This is the point where muscle twitch converts to a tetanic contraction.
What is CRITICAL FUSION FREQUENCY?
Characterized by a Beat Frequency or Envelope.
What is an INTERFERENTIAL CURRENT?
Allows modification and control of frequency characteristics (frequency, pulse duration, duty cycle, rise & decay time)
What is OSCILLATOR CIRCUIT?
Burst and Interrupted AC falls under this type of modulation.
What is TIME MODULATED ALTERNATING CURRENT?
Alternating Current frequency is measured in _______?
What is HERTZ or CPM (Cycles per Minute)?
For Bi-Phasic Pulses, this is measured by adding the two phase durations including the intra-pulse interval.
What is a PULSE DURATION?
A Monophasic pulsed current characterized by a Sine wave of carrier frequency of 100 Hz which is either half wave or full wave rectified.
What is a DIADYNAMIC CURRENT?
Direction of Current Flow.
What is ANODE TO CATHODE?