E-Stim Basics & Pain Managment Flashcards Preview

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Flashcards in E-Stim Basics & Pain Managment Deck (60)
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1

To have current there must be these 3 things

source, conductor, and driving force of electrons

2

Define current

net movement of charged particles along conductor

3

Define electromotive force

amount of electric potential in an electric field that drives charged particles

4

Low voltage is?

<150V

5

High voltage is?

>500V

6

Define inductance

opposition to electric flow created by eddy currents when current passes through a wire

7

Define Capacitance

ability of a material to store electrical charge

8

Define Impedance

resistance+inductance+capacitance

9

Define Conductors

materials that offer little resistance

10

Define Resistors

materials that offer high resistance

11

Semiconductors

materials that offer neither low nor high resistance to current

12

Define Power

WATTS
Volts x Amps

13

Energy created by water flow depends on?

gallons/minute
pressure of the pipes

14

Ohm's Law

V=IR
if we increase resistance we must increase voltage to move current

15

Define Parallel

when current flows through a circuit with multiple pathway to follow

16

Define series

when current flows through every resistor

17

List the 3 type of DC current

Continuous
Reversed DC current
Interrupted DC current

18

Define Continuous DC current

unidirectional flow of electrical charge for at least 1s

19

Define Reversed DC current

unidirectional flow of electrical charge for at least 1s and then changes polarity

20

Define Interrupted DC current

unidirectional flow of electrical charge for at least 1s then stops for 1s then resumes

21

Define AC current

a continuous bidirectional flow of electrical charge where each cycle lasts less than 1s

equal ion flow in each direction=no net charge

1cycle=1wavelength, wavelength inversely proportional to frequency

22

DC current is generally for?

Iontophoresis, Wound healing, Stimulating denervated nerves

23

AC current is generally for?

mm retraining, mm strengthening, pain modulation, functional training ie gait

24

Define pulsed current

Monophasic or Biphasic

25

Define the different types of Biphasic pulsed currents

symmetrical or asymmetrical

asymmetrical is either balanced or unbalanced

26

4 ways to describe WAVEFORMS

Number of phases
symmetry
balance
shape of waveform

27

4 ways to describe Amplitude

peak amp- max current reached for a single phase

peak to peak- max current reached from 1st phase to 2nd phase

RMS amp- for sine wave RMS, 0.707 of peak, 0.354 of peak to peak

average amp- mean volt under sine wave

28

8 ways to describe Time of current

Phase duration- beg of phase to end of phase
Pulse duration- beg of pulse to end of pulse
Rise time- beg of phase to peak of phase
Decay time- peak of phase to end of phase

Interpulse duration- end of pulse to beg of next pulse
Intrapulse duration- end of phase to beg of next phase
Period- time it takes to complete one pulse
Frequency- 1/period

29

4 ways to modify current

amp mods
pulse duration mods
frequency mods
ramp mods

30

Timing mods (Burst)

Burst duration
Interburst interval
Burst frequency