Intro Electrotherapy

Question 1

Charge

Answer 1

• No of free electrons that atoms lose or gain

Question 2

Gaining electrons makes an atom more

Answer 2

negative

Question 3

positive ion

Answer 3

cation

Question 4

negative ion

Answer 4

anion

Question 5

cations are attracted to

Answer 5

cathodes

Question 6

cathodes are what charge

Answer 6

negative

Question 7

anions are attracted to

Answer 7

anodes

Question 8

anodes are what charge

Answer 8

positive

Question 9

unit of measurement for charge

Answer 9

Coulumb

Question 10

Current

Answer 10

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

Question 11

unit of measurement for current

Answer 11

ampere (1 C/s)

mA for stimulators

Question 12

voltage

Answer 12

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

Question 13

Resistance

Answer 13

• Opposition to movement of DC

- Ohm

Question 14

Ohm’s law

Answer 14

I = V/R

Question 15

impedance

Answer 15

• Opposition to movement of AC

Question 16

forms of resistance

Answer 16

○ Circuit stimulator (resistive, capacitive, inductive)

○ Skin surface (resistive, capacitive)

Question 17

Conductance

Answer 17

• Ease with which a material allows current to flow

Question 18

unit of measurement for conductance

Answer 18

○ Mho

○ Siemens

Question 19

Capacitance

Answer 19

• Ability to store charge using electrostatic field

Question 20

unit of measurement of capacitance

Answer 20

Farad

Question 21

Capacity =

Answer 21

charge/voltage

Question 22

Inductance

Answer 22

Ability to store electrical energy through electromagnetic field

Question 23

unit for inductance

Answer 23

henry

Question 24

Power source can be

Answer 24

• Batt operated or direct line

Question 25

pros & cons of batt power source

Answer 25

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

Question 26

pros & cons of direct line power source

Answer 26

○ Stable power
○ More controls
○ Not portable

Question 27

function of output amplifier

Answer 27

• Setting intensity

Question 28

between constant current and constant voltage which is more common

Answer 28

constant current

Question 29

duration for pain relief

Answer 29

20 mins

Question 30

duration for atrophy

Answer 30

10 mins

Question 31

duration for re-education

Answer 31

1-15 mins

Question 32

pro of constant voltage

Answer 32

• Lower internal resistance <50 ohm

- Auto reduction of current (safe)