Interferential Current Flashcards
1
Q
What frequency is used for IFC?
A
3000-5000 Hz
2
Q
What is the treatment frequency dependent on?
A
type of pain
==>acute, subacute, chronic
3
Q
What are the types of wave interference?
A
- constructive
- destructive
- heterodyne
4
Q
What is constructive interference?
A
when two sinusoidal waves that are exactly in phase combine
==>supplement each other
5
Q
What is destructive interference?
A
when two sinusoidal waves are exactly out of phase
==>cancel each other out
6
Q
What is heterodyne interference?
A
combination of constructive and destructive interference
==>wave with beat effect
7
Q
What is heterodyne also called?
A
true interferential current
8
Q
What are the four methods of IFC?
A
- true interferential current
- premodulted IF
- vector scan
- stereodynamic
9
Q
True interferential
A
- 2 channels, 4 electrodes
- applied quadripolar
- cloverleaf pattern
- most intense where currents cross
10
Q
Premod Current
A
- interference occurs in machine, not body
- pain relief
- small treatment areas
- use 2 electrodes
- more accurate
11
Q
Vector scan
A
- quadripolar placement
- uses IF current
- amplitude varies
- cloverleaf
- larger area
12
Q
Stereodynamic
A
- 3 channel
- 6 electrodes
- 3D interference pattern
13
Q
Effects of IFC
A
- pain reduction
- muscle strengthening
- increased circulation
- slow bowel transit
14
Q
What are the contraindications?
A
- cancer
- anterior neck
- through chest
- through head
- pacemakers, ICD
- abdomen, lumbar, pelvis in pregnant women
- metal implants
- epilepsy
- areas of hemorrhage
- confused and unreliable patients
- damaged skin
- unknown etiology
15
Q
What is the frequency for acute pain?
A
80-150 Hz
