Flashcards in Electrotherapeutic Basics Deck (154)

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31

## What is Ohm's Law

### The amount of electromotive force in a circuit is equal to the current intensity multipled by the resistance

32

## What is the equation of Ohm's Law

### V=I*R

33

## What does increasing the resistance do the the voltage to move current

### Increases the voltage

34

## What is a circuit that is in series

### When the same current flows through each resister

35

## What does total resistance equal in a circuit in series

### Rt=R1+R2+...

36

## What is a circuit that is in parallel

### When current flowing through a circuit has multiple pathways to follow through or around each resister

37

## What does total resistance equal in a circuit in parallel

### 1/Rt=1/R1+1/R2+...

38

## What are the 3 basic electrotherapeutic currents

###
1. Direct (DC)

2. Alternating (AC)

3. Pulsatile or pulsed

39

## What are the 3 types of direct/galvanic/monophasic current

###
1. Continuous

2. Reversed DC current

3. Interrupted DC current

40

## What is continuous direct current

### Unidirectional flow of electrical charges for at least one second

41

## What is reversed DC current

### Unidirectional flow of electrical charges for at least one second that then changes polarity

42

## What is interrupted DC current

### Unidirectional flow of electrical charges for at least on second that then stops for at least on second then resumes

43

## What is direct current generally used for (3)

###
1. Iontophoresis

2. Stimulating denervated muscle directly

3. Stimulate wound healing

44

## What is alternating/faradic/biphasic current

### A continuous bidirectional flow of charged particles where each cycle duration occurs in less than one second with equal ion flow in each direction

45

## What does equal ion flow in each direction cause during AC current

### No net charge to be formed

46

## What does the wavelength equal in AC current

### One cycle

47

##
True or False:

In AC current wavelength and frequency are inversely related

### True

48

## What is AC current generally used for (4)

###
1. Muscle strengthening

2. Muscle re-education

3. Pain modulation

4. Functional training

49

## What is pulsatile/pulsed current

### Unidirectional flow of electrical current that lasts less than one second and stops for a finite period before the next pulse

50

## How long is the finite amount of time that pulsed current stops for

### Usually 5-999 milliseconds

51

## What is a dumbed down way to explain pulsed current

### Electric current delivered discontinuously separated by a finite period of time

52

## What are the 2 types of pulsed currents

###
1. Monophasic pulsed current

2. Biphasic pulsed current

53

## What are the 2 types of biphasic pulsed current

###
1. Symmetric

2. Asymmetric

54

## What are the 2 types of asymmetric biphasic current

###
1. Balanced

2. Unbalanced

55

## What makes the asymmetric biphasic current balanced and unbalanced

###
Balanced: The area under the wave is the same (so same charge) for both waves but different length of time

Unbalanced: The area under the wave is different (so different charge) but the length of time is the same

56

## Does balanced or unbalanced asymmetric biphasic current result in the build up of current on one side

### Unbalanced

57

## What is the waveform

### The shape of the current intensity vs. time graph

58

## What are the possible number of phases (4)

###
1. Monophasic

2. Biphasic

3. Triphasic

4. Polyphasic

59

## what are the possible symmetries of phases (2)

###
1. Symmetry

2. Asymmetry

60