Estim Flashcards
Muscle strengthening
Targets alpha motor neurons Alternating current , Pulsed 35-80 Hz (40-60 pps) 1:5 on:off time 300-400 micoseconds for big muscle 150 for small muscle Want max isometric contraction until fatigue
Muscle re-ed/Functional estim
Targets alpha motor neurons Alternating current, Pulsed 35-80 Hz (40-60 pps) 1:3 on:off time 300-400 microseconds for big muscle 150 for small Want tetany (don't need max contraction)
frequency and comfort
Higher frequency is more comfortable
With increasing frequency -
Recruits more motor units
Dec impedance
Improve comfort
Mm will fatigue faster
Pulse duration is what
Length of time motor units contract for given pulse
Long duration with lower intensity is best!
Smaller on:off times means
mm fatigues faster
Frequency
Increased frequency creates increased depth of penetration
40-60 pps is best
Inc freq = Inc depth
Amplitude and phase duration
Increased amp and short phase duration is comfortable and effective
Sensory level/Conventional TENS
Targets sensory nerve fibers (gate control theory)
Alternating current, pulsed
Continuous
Amp - tingling
80-150 Hz
20-50 microseconds (pulse duration)
At least 20 min of tx, no residual effect
NMES Muscle Spasm
Alternating current, Pulsed Targets alpha motor neurons Amp = large enough for mm contraction (MAX) 1:1 ratio to fatigue muscle 35-80 Hz (80-120 pps) 300-400 big, 150 small Tx time for 10-15 minutes
Motor level TENS
Hopefully activates C and A delta fibers to release B endorphin (target endogenous opiates)
Used for relief with chronic pain
Alternating current, targets alpha motor neurons
2-10 Hz (1-4 pps)
300-400 big, 150 small
Tx time = 30-45 min
Intensity - until get twitch contraction
Noxious TENS
Direct current, Monophasic pulsed (HVPC), Continuous
Targets C fibers to prevent release of sub P
1-5 pps
Pulse duration - 1 ms to 1 sec
Pt will feel tingling, mm twitch, sharp pain, then dull pain
HVPC
Pulsed monophasic
80-150 Hz (120 pps)
30-100 msec
Usually preset
IFC
Targets A beta fibers
80-150 Hz
Continuous
Iontophoresis - dexamethasone
negative
Used for inflammation
