Principles Of Electrotherapy

Question 0

what is frequency and how is it measured?

Answer 0

number of pulses (rate) per second

measured by: pps or Hz

Question 1

If the strength of the amp has a high intensity, how long is the duration? If it is low?

Answer 1

high intensity = short width

low intensity = long width

Question 2

Which rise time is best for denervating?

Answer 2

Slow Rate of Rise

Question 3

Fast rate of rise is best for?

Answer 3

pain control

Question 4

What are the three Laws of Dubois Reymond?

Answer 4

1. adequate intensity to reach the threshold.
2. current onset fast enough to reduce accommodation.
3. phase duration long enough to exceed capacitance.

Question 5

What is a typical extrinsic duty cycle set at?

Answer 5

50 sec on 50 sec off.

= 1 contraction per minute

Question 6

Intrinsic duty cycles are stronger because they have “bursts”, give examples and their frequencies.

Answer 6

Russian 250 Hz
IFC 400 to 500 Hz
and biphasic 100Hz

Question 7

What are three types of electrode configurations?

Answer 7

Monopolar - one small one large (feel it more in the active”little” one)
ex: probe
Bipolar - equal-sized (common for tens)

Quadpolar - 4 pads placed diagonal w/ cross currents
ex: IFC