General EStim Info

• regulation of constand current/voltage to patient regardless of changing imedances
• Constant Current
• Constant Voltage

• unidirectional flow of charge particies
• Negative is better
• When the machine is on the curent in constant

• An uninterrupted bidiretional flow of charged particles
• One half cycle above baseline and second phase beloe baseline

• Interrupted unidirectinal or bidirectional
• Most Commonly Used

• Visual representation of current or voltage over time
• Traditionally called by shapes or characteristics
• Shape- rectangular, sinusoidal, spike, square, triangular
• Characteristic- faradic (direct), high-voltage, pulsed, interferential, russian

• Phases
• Phase Duration
• Interphase Interval
• Pulse duration (width)
• Interpulse Interval
• Rise time/ Fall Time

Pulse is equal to phase

• Pulse one direction from baseline then opposite direction before pulse is over
• Made up of 2 phases
• Can be Symmetrical or asymmetrical

Phase charges are electrically equal

• Phase charges eletricall unequal
• Wil have positive or negative charge

Time elasped from beginnig to end of one phase

• Time between two successive phases when no electrical activity occures
• May also be called intrpulse interval

• Width
• Time elapsed from beginning to end of all phases of one pulse
• Length of time one pulse lasts
• Sum of all phases of a pulsed current and intraphase interval
• controls labeled pulse width

Time between two successive pulses

Time it take for an individual stimulus to reach a peak level of magnitude

Time it takes for an indeividual stimulus to return to zero

• Repetition rate of a waveform
• Pulses per second delivered per unit of time
• Low- less than 1000pps
• Medium - 1000-10000pps
• High - greater than 10,000pps
• Controls often labeled rate
• Hz pps

Time from a referene point of a pulse to the identical point of the next pulse

Automatic sequential variation in the amplitude, pulse, and/or cycle duration and frquency of current during a series of pulses or cycles

• Finite series of pulses
• Build into machine

Continuous repetitive sequence of pulses or cycles of pulsed current

• Mixing of alternating current at different fequencies taht are out of phase
• used with interferential current

• Intensity
• Strength of response of sensory or motor fibers
• More= deper fibers reached

• Ease of getting a muscle contraction
• Longer = less intensity and more uncomfortable

• quality of muscle contration
• rate of fiber fatigue
• Increase frequency increase fatigue

• Effectiveness
• Comfort

• High Frequency 200pps/hz
• Short Duration 50 usec
• Low Intensity mA

• Low Frequency 20pps/Hz
• Long duration 200usec
• High Intensity