Electrotherapeutic Basics Flashcards
down to the subcutaneous fat, the electric goes through a blank circuit
series
line that has 0 for ac and dc measurement
isoelectric line
deeper than the subcutaneous fat with all the different blood supplies type of circuit
parallel
requirements for a current
conductor, driving force, source of electrons
amount of potential difference between two points in an electrical field
electromotive force
electromotive force drives charge particles and is measured in blank
volts
commercial current flowing from a wall outlet is about
110 volts or 220 volts
modaliities using less than 150 volts are considered blank generators
low voltage
modalities that produce several hundred (up to 500) volts are considered blank generators
high voltage
measure of electric charge equal to 6.25 x 10^18 electrons
coulomb
measure of current flow
amps
ability of medium to resist flow through direct current
resistance
opposition to electron flow created by electromagnetic eddy currents generated when current goes through wire
inductance
ability to store charge
capacitance
resistance + inductance + capacitance
impedance
materials that offer little resistance allow current to flow easily
conductors
materials that offer high resistance for current to flow
insulators
volt = water blank
pump
ampere = water blank
gallon/min
watts =
volts x amps
power =
V x I
ohms law
V = IR
when same current flows through each resistor, they are said to be in blank
series
when current flowing through a circuit has multiple pathways to follow through or around each resistor
parallel
unidirectional flow of electrical charges for at least one second
continuous
unidirectional flow of electrical charges for at least one second that then changes polarity
reversed DC current
reversed and interrupted dc current allow for less chance of blank
burn
dc also stimulates blank
wound healing
larger pulse duration equals blank frequency
lower
ac current is generally used for blank
muscle strengthening/re-education, pain mod, functional training
two pulsed types of current
monophasic, biphasic
biphasic current means it goes from blank to blank
positive, negative
max current reached in a single phase
peak amplitude
amplitude to get to top of one phase to top of the other phase
peak to peak amplitude
area under the curve amplitude
root mean square amplitude (average)
distance between pulses
interpulse interval
a series of pulses flowing for a finite period of time followe by a period of no current flow
bursting
smaller electrodes have blank current density
higher
to target deeper tissues, electrodes should be placed blank
far apart
