russian current 2011

8/3/2019 Russian Current 2011

1/14


2/14

Russian Currents

1977 Yakov Kots It is basically a medium-frequency alternating current

or It is an intermittent alternating sinusoidal current with

a carrier frequency of 2500 Hz.or

Russian Current is a sinusoidal waveform, deliveredin bursts or series of pulses. Also known as medium frequency, burst alternating

current.


3/14

Russian current consists of a 2500 Hz evenly

alternating medium frequency current appliedas a series of separate bursts, having apulse duration of 0.2 ms, which isinterspersed with 10 ms periods when no

current flows, producing 50 bursts (pulsetrain) per second, which is infact like low

frequency faradic type pulse at 50 Hz.


4/14

Pulse Trains (Bursts)

Trains contain individual pulses

Pulses in the train still have time-dependent characteristics: pulseduration, interpulse interval, etc.

Each train is separated by off times the intertrain (or interburst)interval

4

Pulse train


5/14

Pulse Ramp

Used with a duty cycle

Gradually increases the current

Produces a more natural contraction

More comfortable


6/14

Russian Currents

Pulse duration varies

from 50-250 sec;the phase duration ishalf of the pulseduration or 25-125

sec


7/14

Russian Currents

Pulse duration varies

from 50-250 sec;the phase duration ishalf of the pulseduration or 25-125

sec


8/14

The amplitude should be increased until a

powerful contraction is produced (from themotor stimulation level up to the limit oftolerance).


9/14

RUSSIAN STIMULATION

PHYSIOLOGICAL EFFECTS

Muscle strengthening and re-education

Decrease edema

Increase blood flow

Reduces muscle spasm


10/14


11/14

Method of Application: Muscle Strengthening

Protocol

Amplitude: tetanic muscle

contraction Pulse Rate: 50-70 pps

Pulse duration: 150-200 microsec

Ramp 1-5 seconds based onpatient's tolerance

Duty cycle: 1:5


12/14

What is the difference b/w electrically inducedmuscle contraction and voluntary muscle

contraction

The asynchrony of the firing of motor units undervoluntary control And the synchronous of the firing of

electrically stimulated muscles Each time the electrical stimulus is applied the same

motor unit responds, this may lead to greater fatiguein the electrically stimulated muscles.

Normal firing in voluntary muscle contraction varies

from one movement to the next, because somemotor units are contracting while other are inactive. Voluntary contractions do not lead to muscle fatigue

as early in the exercise as do electrical contractions.

RUSSIAN CURRENT


13/14

RUSSIAN CURRENT

2500 Hz

sine wave (carrier frequency)

interrupted for 10 ms at 10 ms intervals

produce 50 (10 ms bursts/sec)

time-modulated current

medium frequency, burst AC WAVEFORM: biphasic sinusoidal

MODULATION: continuous pulsatile current with burst modulation

For MUSCLE STRENGTHENINGtetanic muscle contraction50 to 70 pps150 to 200 usec

ramp 1 to 5 secondsduty cycle of 1:5isometric exerciseslow isokinetic exercise like 5 to 10 per secondshort arc joint movement when there is ROM restriction

FOR MUSCLE SPASM

muscle fatiguecontinuous isometric contractionseveral minutes to toleranceduty cycle of 1:1 for muscle pumping2: 5 for ROM


14/14

Summary

russian current 2011

Documents