E stim ppt 1 Flashcards
(24 cards)
what does a positive charge mean?
contains less electrons then normal
what does one coloumb of charge equal?
6.25 * 10^18 electrons
what does a single electron equal?
1.6*10^-19C
what does polarity mean?
ability to have 2 oppositely charged conductors
what kind of polarity does an anode have?
(+)
what kind of polarity does a cathode have?
(-)
what is the direction of electron flow?
(-) to (+) area of high electrons to area of low electrons
what is an ion?
an electrically charged atom
what is an anion attracted to?
anode
what is a cation attracted to?
cathode
what is current a measure of?
rate at which charge flows
what is current?
rate at which charge flows
what is voltage?
potential energy difference
what is the average current for DC current?
peak amp
what is the average current for AC current?
65-75% peak amp
which specific electrotherapeutic current has less current flowing then the rest?
PC
what is the maximum current you should use irrespective of the electrode size?
30-40ma
the highest/lowest average current will produce the desired physiologic response.
lowest
“the measure of magnitude of current/voltage with reference to the isoelectric line”
peak amplitude
the higher the peak amplitude…
the deeper the penetration
what is pulse duration dependent on?
time
in monophasic wave forms, phase duration is equal to what?
pulse duration
what is the traditional basic descriptive unit?
pulse
what is pulse duration associated with?
comfort
factor in determining pulse charge
ability to discriminate between clinical levels of stim.
