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Flashcards in Intro Electrotherapy Deck (32)
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1

Charge

- No of free electrons that atoms lose or gain

2

Gaining electrons makes an atom more

negative

3

positive ion

cation

4

negative ion

anion

5

cations are attracted to

cathodes

6

cathodes are what charge

negative

7

anions are attracted to

anodes

8

anodes are what charge

positive

9

unit of measurement for charge

Coulumb

10

Current

- Movement of charged particles
- Response to an applied electric field
- Opposite flow of electrons

11

unit of measurement for current

ampere (1 C/s)
mA for stimulators

12

voltage

- Electromotive force or electrical potential difference
- Diff between positive and negative charges
- Driving force that makes particles move

13

Resistance

- Opposition to movement of DC
- Ohm

14

Ohm's law

I = V/R

15

impedance

- Opposition to movement of AC

16

forms of resistance

○ Circuit stimulator (resistive, capacitive, inductive)
○ Skin surface (resistive, capacitive)

17

Conductance

- Ease with which a material allows current to flow

18

unit of measurement for conductance

○ Mho
○ Siemens

19

Capacitance

- Ability to store charge using electrostatic field

20

unit of measurement of capacitance

Farad

21

Capacity =

charge/voltage

22

Inductance

Ability to store electrical energy through electromagnetic field

23

unit for inductance

henry

24

Power source can be

- Batt operated or direct line

25

pros & cons of batt power source

○ Small stimulator
○ Portable
○ Not reliable source
○ Limited options

26

pros & cons of direct line power source

○ Stable power
○ More controls
○ Not portable

27

function of output amplifier

- Setting intensity

28

between constant current and constant voltage which is more common

constant current

29

duration for pain relief

20 mins

30

duration for atrophy

10 mins