PT- Low Freq modalities

Question 1

name the 3 types of Low freq modalities

Answer 1

1. LVDC
2. HVDC
3. Faradic wave current

Question 2

physio effect with 1-10Hz at low freq

Answer 2

vasoconstriction - acute

Question 3

Physio effects at each: (HVDC) 
1-10 Hz
20-40 hz
40-80 Hz
80-250 Hz

Answer 3

1-10 Hz: vasoconstriction -acute
20-40 Hz: vasodilation - chronic
40-80 Hz: M stim - chronic
80-250 Hz: analgesia - acute

Question 4

__-__ hz should be used for analgesic effects and vasoconstriction during an acute injury

Answer 4

2-5Hz

Question 5

LVDC: anophoresis vs. cathophoresis

Answer 5

anophoresis: active anode& inactive cathode
cathophoresis: active cathode, and inactive anode

“5 min rule”

Question 6

“twin peak, symmetrical monophonic” , bipolar describes what low freq modality

Answer 6

HVDC

Question 7

“galvanic monophasic” refers to what low freq modality

Answer 7

LVDC

Question 8

the “5 minute rule” is used for what modality

Answer 8

LVDC

Question 9

name the Alternating current:

____: turns on and off –> waves are the same

___: min–> to max instantly

__: causes tetany

__: square + faradic

Answer 9

sine wave : turns on and off –> waves are the same

Square wave : min–> to max instantly

faradic wave : causes tetany

hybrid : square + faradic

Question 10

What is the only AC current that has any effect on atrophied nerves ?

Answer 10

Sine wave (SWR)

Question 11

What two wave types are used with TENS

Answer 11

square and Spike

Question 12

Square vs. Spike TENS

When to use?
Irritation factor?
Lasting effects?

Answer 12

Square:
when to use: Chronic
Irritation: less
Lasting effect: long

Spike:

• Best for pre-adjustment
• Irritation: more
• lasting effect: shorter

Question 13

uses for MENS (4)

Answer 13

1. non-union bone fx
2. shin wound
3. replace tiss current
   4, ATP production to incr metab. and incr cellular respiration

NOT USED FOR ST