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Electrical Stimulation II
Biofeedback, EMS2, DC-Continuous, HVPC, Russian Stim
169
Medical
Graduate
07/17/2015

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Term
monopolar russian stim uses what type of pads
Definition
active and dispersive
Term
monopolar russian stim: how much smaller must the active pad be to the dispersive
Definition
4x
Term
bipolar and quadripolar russian stim uses what size pads
Definition
equally sized
Term
russian stim: burst rate
Definition
50-70 pps
Term
russian stim: carrier frequency
Definition
2,000-10,000 Hz
Term
russian stim: on/off ration
Definition
depends, on time usually 10 seconds, off time from 10-50
Term
russian stim: current amplitude
Definition
patient's maximum tolerance
Term
russian stim: treatment time
Definition
recommended 10 contractions
Term
HVPC: how far must the other electrode be positioned from the electrode on the wound
Definition
5 cm
Term
HVPC: for soft tissue edema, where shoudl teh dispersive pad be plaed
Definition
proximal to the active pad (between the swelling and the heart)
Term
HVPC: what should teh polarity of the active pad be for soft tissue edema
Definition
(-)
Term
HVPC: soft tissue edema: pulse frequency
Definition
1-10 pps
Term
HVPC: soft tissue edema: amplitude
Definition
enough to cause teh desired muscle contraction
Term
HVPC: pain management: pulse frequency
Definition
~100 pps
Term
HVPC: pain management: amplitude
Definition
100 v
Term
HVPC pain management treatment duration
Definition
30-120 minutes
Term
What is continuous DC stimulation used for
Definition
denervated muscle
Term
Continuous DC Stimulation: waveform
Definition
DC, may use AC to start
Term
Continuous DC Stimulation: pulse rate
Definition
will be determined by the frequency of skin contact by the tap key
Term
Continuous DC Stimulation: pulse width
Definition
use chronaxie if known, otherwise at least 100 msec.
Term
Continuous DC Stimulation: current amplitude
Definition
should be strong enough to elicit muscle twitching
Term
Continuous DC Stimulation: treatment time
Definition
either muscle fatigue or lack of good twitches, or 3 sets of 10-20 reps
Term
EMS2: pulse rate
Definition
>33 pps for optimal tetanic contraction, but as high as tolerable if trying to fatigue the muscle
Term
EMS2: pulse width
Definition
for muscle strengthening any setting is acceptable but for fatiguing turn the width up as high as possible
Term
EMS2: on/off ratio
Definition
on typically 10, off typically 10-60 usually 60 though
Term
EMS2: ramp times
Definition
2-3 seconds
Term
EMS2: current amplitude
Definition
stregthening muscle: enough to evoke a tetanic contraction. fatiguing muscle: intensity up as high as tolerated
Term
EMS2: treatment time
Definition
dependson the # of evoked contractiosn desire. Stim should be continuous to evoke fatigue. Typical treatment time 15-30 minutes
Term
Biofeedback: how many electrodes must be used in bipolar technique
Definition
3. active: +, -, and a reference(ground)
Term
Biofeedback: Bipolar technique: How far apart should the active electrodes be placed from each other
Definition
at least 15 cm apart if allowable
Term
Biofeedback: bipolar technique: where should the reference electrode be placed
Definition
either between teh active electrodes or near the actives
Term
Biofeedback: bipolar technique: what happens when the active electrodes are placed closer to each other
Definition
minimize cross talk, yields small signals, gives a more precise signal
Term
Biofeedback: bipolar technique: what happens when active electrodes are placed further apart
Definition
allows for more cross talk, yields large signals, and gives a less precise signal (picks up electrical activity from other non targeted tissue)
Term
raw emg signals has what types of phases
Definition
positive and negative
Term
difference between raw and rectified emg signal
Definition
recitified emg signal has positve and negative aspects of teh summated potentials and made unidirectional
Term
How should biofeedback be applied with weak muscles
Definition
widely spaced electrodes, biofeedback instrument sensitivity set to high to increase detection
Term
how should biofeedback be used to decrease muscle activty (relax muscle)
Definition
electrodes closely spaced and biofeedback sensitivty to low to minimize cross talk
Term
Criteria for patient selection for biofeedback training (4)
Definition
good vision, hearing, and communicaiton abilities, good comprehension of simple comands, concentration, good motor planning skills, no profound sensory or proprioceptive loss
Term
Biofeedback: indications for muscle relaxation
Definition
stress related hyperarousal, pain, spasticity, torticollis
Term
Biofeedback: indications for muscle recruitment (3)
Definition
peripheral nerve injury (muscle must be reiinervated), muscle weakness s/p immobilization, joint surgery, disuse atrophy, pain, antagnoists to spastic muscles
Term
high volt galvanic stimulation aka
Definition
high volt pulsed current (HVPC)
Term
HVPC is used for what clinically (3)
Definition
edema reduction, dermal wound healing, reduction of pain
Term
How does HVPC manage soft tissue edema
Definition
local muscle pumping through repeated evoked muscle contractions, and fluid repulsion through microvascular changes
Term
how does HVPC manage pain?
Definition
same as TENS via the gate theory
Term
how does HVPC aid in dermal wound healing
Definition
mimics and strengthens the natural weakened, skin battery to enhance and maintain the healing process.
Term
what is the skin battery?
Definition
natural direct current bioelectric system that flows between the dermis and epidermis. Maintains tissue health
Term
Biophysical parameters of HVPC (peaks, phase, type of currents, duration, voltage)
Definition
twin-peak, monophasic, pulsed currents, fixed durations, high voltage
Term
HVPC: each pulse consists of a pair of twin spiked waveforms having an almost instanteous rise with an exponential decline
Definition
twin-peak monophasic pulse
Term
How is HVPC pulse duraiton determined
Definition
teh sum of the duration of both spikes plus the interspike interval
Term
How long are typical HVPC pulses
Definition
100-200 microseconds
Term
Typical HVPC frequency
Definition
1-200 pps (Hertz)
Term
Tissue impedance when using HVPC
Definition
very low tissue impedance making it comfortable for the patient and effective
Term
HVPC: what types of electrode pads should be used when treating edema
Definition
cathode (-)
Term
HVPC: why are cathode pads used in treating edema
Definition
edema is (-) charged, need opposite charge to push fluid closer to heart
Term
HVPC: where is the anode dispersive pad placed for edema treatment
Definition
between the treatment area and the heart
Term
HVPC: parameters for edema (frequency, amplitude, pulse duration, mode, treatment time)
Definition
PF: as high as possible, amplitude: sensory threshold, PD: usually not manipulated in microseconds, continuous mode, tx time 30-60 mins)
Term
HVPC: parameters to control edema via muscle pumping/contractions (PF, amplitude, on/off time, tx time)
Definition
PF 1-10 pps, amplitude: motor response, on/off typically 15/45 sec, time =30-60 minutes)
Term
HVPC: type of active electrode used for INFECTED wounds
Definition
cathode (-)
Term
HVPC: why is the cathode used for INFECTED wounds
Definition
bactericidal effects
Term
HVPC: active electrode for NONINFECTED wounds
Definition
anode (+)
Term
HVPC: parameters for wound healing (pf, intensity, tx time)
Definition
PF=30-200 as high as possible, Intensity = patient comfort without motor response, tx time=30-60 mins)
Term
HVPC: indications
Definition
dermal wounds, edema, pain relief
Term
HVPC: Wound Healing Sussman: proliferative phase parameters (polarity, PF, intensity, duration)
Definition
(-), PF between 100-128 pps, Intensity: submotor, duraiton 30-60 minutes
Term
HVPC: Wound Healing Sussman: epithelialization phase paramters (polarity, PF, intensity, duration)
Definition
(+), PF decreased to 64 pps, Intensity: Submotor, Duration 30-60 minutes)
Term
What is continuous DC stimulation used for
Definition
denervated muscle
Term
Why is continuous DC stimulation used for denervated muscle?
Definition
minimize the extent of atrophy that occurs while the peripheral nerve is regenerating
Term
Physiologic effects of stimulating denervated muscle: (2)
Definition
decreased atrophy/increased muscle strength, decreased edema
Term
Continuous DC stimulation parameters: waveform, amplitude, frequency, pulse width
Definition
continuous DC, amplitude enough to cause a visible muscle contraction, frequency: set by frequency of contact with tap key, pulse width chronaxie if known otherwise at least 100 microseconds
Term
the intensity of the current needed to produce a minimal muscle contraction
Definition
rheboase
Term
the duration of the stimulus at twice the rheobase intensity
Definition
chronaxie
Term
What is the chrnoaxie of denervated muscle
Definition
>1 ms
Term
Some clinicians advocate the use of what pulse width intially for patient comfort
Definition
<1 msec pulse duration
Term
Continuous DC stimulation: ramp time
Definition
doesn't matter, denervated muscle does not accomodate
Term
Continuous DC stimulation: location of dispersive pad
Definition
distant from the treatment site
Term
Continuous DC stimulation: duration of the treatment
Definition
3 sets of 10-20 reps daily or until motor point is fatigued
Term
Continuous DC stimulation: contraindication specific to this modality
Definition
galvanic DC can cause skin irritation
Term
neuromuscular device characterized by a low volt stimulation to depolarize motor nerve fibers to cause a muscle contraciton
Definition
EMS+2
Term
EMS+2: is used clinically primarily for what...
Definition
prevent, or reduce muscle atrophy
Term
Continuous DC stimulation: secondary functions
Definition
improve circulation, increase ROM, improve muscle endurance
Term
Continuous DC stimulation: end point of muscle strengthening and re-education mode, ie what is the goal
Definition
elicit a good tetanic contraction
Term
EMS2: muscle strengthening and reeducation: frequency needed to elicit a tetanic contraction
Definition
>33 Hz
Term
EMS2: frequency needed for edema reduction
Definition
>33 Hz, to elicit a tetanic contraction
Term
EMS2: what set up would be used to decraese spasm
Definition
monopolar set up
Term
EMS2: where would the smaller electrode be placed for decreasing spasm
Definition
motor point of painful muscle
Term
EMS2: What size should the dispersive pad be for decreasing spasm
Definition
4x greater than the active pad
Term
EMS2: a bipolar set up for decreasing spasm would cause what?
Definition
repetitive contract/relax which also induces muscular relaxation
Term
EMS2: waveforms
Definition
AC, DC
Term
EMS2: Waveform: AC
Definition
symmetrical rectangular with net 0 charge
Term
EMS2: Waveforms: DC
Definition
monophasic rectangular
Term
EMS2: ramp up/down time
Definition
adjustable between 1 and 6 seconds
Term
EMS2: pulse rate
Definition
adjustable between 4-80 Hz
Term
EMS2: Pulse width
Definition
50-300 microseconds
Term
EMS2: amplitude
Definition
tetanic contraction desired
Term
EMS2: duty cycle
Definition
typically 1:6 (10 on, 60 off)
Term
EMS2: duration
Definition
adjustable. continuous, 15,30, 60 minutes.
Term
EMS2: Muscle Strengthening and contract/relax mode: waveform
Definition
either AC or DC is acceptable
Term
EMS2: Muscle Strengthening and contract/relax mode: ramp up/down time
Definition
between 2-3 seconds for patient comfort
Term
EMS2: Muscle Strengthening and contract/relax mode: pulse rate (frequency)
Definition
>33 Hz
Term
EMS2: Muscle Strengthening and contract/relax mode: pulse width
Definition
50-300 microseconds (as high as tolerable)
Term
EMS2: Muscle Strengthening and contract/relax mode: amplitude
Definition
tetanic contraction desired
Term
EMS2: Muscle Strengthening and contract/relax mode: duty cycle
Definition
10 on, 60 off. off may be decreased as patient becomes more accustomed to device
Term
EMS2: Muscle Strengthening and contract/relax mode: duration
Definition
15-30 minutes
Term
EMS2: Fatigue mode: waveform
Definition
either AC or DC is accetable
Term
EMS2: Fatigue mode: ramp up/down time
Definition
minimize ramp time to lowest possible setting
Term
EMS2: Fatigue mode: pulse rate (frequency)
Definition
>33 Hz (as high as tolerable)
Term
EMS2: Fatigue mode: amplitude
Definition
tetanic contraction desired
Term
EMS2: Fatigue mode: duty cycle
Definition
maximum allowable time on, least allowable time off
Term
EMS2: Fatigue mode: duration
Definition
15-30 minutes
Term
EMS2: Foot Drop: waveform
Definition
either AC or DC
Term
EMS2: Foot Drop: ramp up/down time
Definition
none
Term
EMS2: Foot Drop: pulse rate (frequency)
Definition
>33 Hz
Term
EMS2: Foot Drop: Pulse Width
Definition
50-300 microseconds (as high as tolerable)
Term
EMS2: Foot Drop: amplitude
Definition
tetanic contraction desired
Term
EMS2: Foot Drop: duty cycle
Definition
no duty cycle, stim is triggered with foot switch
Term
EMS2: Foot Drop: duration
Definition
depends on patient's endurance
Term
specialized form of NMES used to treat dysphagia
Definition
Vital Stim
Term
What does vital stim do
Definition
re-educates the throat muscles associated with swallowing
Term
Vital stim frequency
Definition
80 Hz
Term
EMS2: does the electrode waveform matter
Definition
nope
Term
EMS2: how do you choose the size of the electrode
Definition
most corresponds with the size of the muscle and the area that you are treating
Term
EMS2: danger in choosing electrodes that are too small for an area
Definition
thermal skin burn
Term
EMS2: current density and depth of muscle stimulation with a greater interelectrode distance
Definition
greater current density, deeper muscle stimulation
Term
EMS2: ideal placement of electrodes
Definition
produce the desired muscle contraction with no or minimal discomfort
Term
EMS2: monopolar set up utilizes what type of electrodes
Definition
small active, 4x larger dispersive
Term
EMS2: monopolar set up is used to do what
Definition
fatigue muscle
Term
EMS2: in the monopolar set up where should the larger pad be placed
Definition
non excitable tissue
Term
EMS2: footswitch set up stimultates what mm group or nereve
Definition
dorsiflexors or Common Peroneal (common fibular) nerve
Term
EMS2: electrode orientation
Definition
parallel or in the line of pull of the muscle
Term
what is a motor point CLINICALLY
Definition
area within the targeted muscle mass that is best stimulated with the smallest amount of amplitude and the shortest pulse duratoin
Term
what is a motor point ANATOMICALLY
Definition
motor point is the surface entry point of a bundle of motor nerve fibers into a bundle of muscle fibers
Term
EMS2: indications
Definition
strengthen muscle, promote fatigue in hypertonic muscles
Term
EMS2: contraindications
Definition
same as any EStim. If exercise accompanies EMS2 make sure resisted exercise is indicated for ptnt
Term
Russian Stimulation: clinically uses (3)
Definition
improve motor recruitment, facilitate muscle hypertrophy, improve strength
Term
Russian Stimulation: Physiologic effects: Evokes what type of contraction
Definition
tetanic
Term
Russian Stimulation: why should the tetanic contraction be painelss
Definition
sensory nerve blockade due to depoarlization of sensory nerve fibers
Term
Russian Stimulation: is the contraction caused by russian stim stronger or weaker than one created by voluntary control
Definition
stronger
Term
Russian Stimulation: since Russian stim is relatively painless it can be applied where
Definition
deeper motor nerve fibers assoicated with high force fast twitch motor units
Term
Russian Stimulation: in electrically evoked muscle stimulation how do motor units fire
Definition
synchronously
Term
Russian Stimulation: in normal muscle recruitment, how do motor units fire
Definition
asynchronously fired
Term
Russian Stimulation: how are muscle fiber types recruited in electrically-evoked muscle stim
Definition
fast to slow twitch
Term
Russian Stimulation: how are muscle fiber types recruited under normal contraction
Definition
slow to fast
Term
Russian Stimulation: amplitude
Definition
tetanic muscle contraction
Term
Russian Stimulation: pulse rate
Definition
50-70 Hz
Term
Russian Stimulation: carrier frequency (Hz)
Definition
2000-10,000 Hz
Term
Russian Stimulation: pulse duration
Definition
150-200 microseconds, may be higher if trying to decrease spasm/spasticty by fatiguing muscles
Term
Russian Stimulation: current can be applied to provide stimulation for strengthening during the following volitoional activities
Definition
isometric exercises at various points through the range, slow isokinetic exercise 5-10 degrees/sec, short arc joint movement where movement is restricted
Term
Russian Stimulation: ramp time
Definition
1-5 second for patient comfort
Term
Russian Stimulation: duty cycle
Definition
10 sec on, 10 sec off
Term
Russian Stimulation: to decrease spasm/spasticity: ramp time
Definition
1-5 seconds
Term
Russian Stimulation: duty cycle to decrease spasm/spasticty
Definition
10 on, 50-60 off, continuous mode to induce fatigue, or 50 on 10 off
Term
Russian Stimulation: treatment duration
Definition
10-20 minutes
Term
Russian Stimulation: treatment duration for muscle strength
Definition
10 contractions = 10 minutes
Term
Russian Stimulation: duration to decrease spasm
Definition
15-20 minutes
Term
Russian Stimulation: when should russian stim be used to decrease spasm
Definition
prior to functional activity
Term
Russian Stimulation: why should you not pick an electrode that is too small for the area being treated
Definition
may cause pain or a thermal skin burn
Term
Russian Stimulation: positioning of electrodes
Definition
Same as EMS2
Term
Russian Stimulation: the quadripolaer methods involves placing the electrodes in a way that...
Definition
the imaginary lines of currents in each pain could interact (run in parallel or crisscross) with each other within the targeted tissue
Term
Russian Stimulation: indications
Definition
strengthen muscles of healthy individuals
Term
the use of instrumentation to bring specific events to conscious awareness
Definition
biofeedback
Term
Biofeedback: examples of instruments which provide biofeedback
Definition
EMG's, stability/bp cuffs, mirrors
Term
Biofeedback: what does an EMG do for biofeedback
Definition
does ont provide stimulation but reads the electrical activity of the muscles
Term
Biofeedback: EMG is commonly used for what
Definition
muscle relaxation, muscle re-education
Term
Biofeedback: Muscle Relaxation: sensitivity
Definition
high
Term
Biofeedback: muscle relaxation: sensitivity as patient progresses
Definition
lower the sensitivity
Term
Biofeedback: muscle re-education: what is the sensitivity elvel
Definition
set at 2/3 max contraction
Term
Biofeedback: muscle re-education: sensitivity as patient progresses
Definition
raise sensitivity
Term
Biofeedback: thereapeutic effects (6)
Definition
decreased accessory muscle use, decreased muscle spasm, decreased pain, improved muscle strength/recruitment, muscle relaxation, neuromuscular control
Term
Biofeedback: indications (7)
Definition
incontinence, hemiplegia, impaired motor control, muscle spasm, muscle weakness, pain, SCI
Term
Biofeedback: contraindications
Definition
none
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