What is EMS (Muscle Stimulator) Neuromuscular Stimulation?

Neuromuscular Stimulation is achieved by sending small electrical impulses through the skin to the underlying motor units (nerves and muscles) to create an involuntary muscle contraction. Neuromuscular stimulation has many uses beyond its traditional application to prevent disuse atrophy, including:

Range of motion as a substitute for passive stretching exercise performed by the patient or therapist.

Muscle re-education.

How does Neuromuscular Stimulator work? Because the stimulation of nerves and muscles may be accomplished by electrical pulses this Modality can help prevent disuse atrophy. Accordingly, incapacitated patients can receive therapeutic treatment to create involuntary muscle contractions thereby improving and maintaining muscle tone without actual physical activity.

The EMS Muscle Stimulator is an easy to use system. A marvel of miniaturized electronics the lightweight power unit transmits electrical pulses through the skin surface and stimulates motor units (nerve and muscles). The electrical impulses are "ramped" so that they closely emulate natural muscle contractions.

EMS is helpful in conditions where the reduction of physiological range of motion is due to or the result of fractures with consequent immobilization, operative intervention, or arthroscopy, in shoulders, knees, and backs.

EMS units are used to treat a number of medical conditions that require muscle stimulation. The most common are: long-term disuse after fracture or prolonged bed rest, progressive strengthening for join and muscle injury, immoblized limbs, atrophy prevention , stress incontinence, muscle weakness, improving muscle tone, after weight loss or childbirth, muscle spasticity following a stroke.

How does Interferential Work?

Transcutaneous Electrical Nerve Stimulation (TENS) (the most commonly used) Interferential Current (IFC) Galvanic Stimulation (GS)

Transcutaneous electrical nerve stimulators (TENS) A person may use a TENS unit at home for pain relief on a long-term basis. TENS units allow the user to adjust the intensity of the stimulation; some units also allow the user to select high-frequency stimulation (60 - 200 Hz) or low-frequency stimulation (<10 Hz).

High frequency stimulation, sometimes called "conventional", is tolerable for hours, but the resultant pain relief lasts for a shorter period of time. Low-frequency stimulation, sometimes called "acupuncture-like", is more uncomfortable and tolerable for only 20-30 minutes, but the resultant pain relief lasts longer.[citation needed]

Interferential current (IFC) Interferential current is essentially a deeper form of TENS. In essence, IFC modulates a high frequency (4000 Hz) carrier waveform with the same signal produced by a TENS unit. The high frequency carrier waveform penetrates the skin more deeply than a regular TENS unit, with less user discomfort for a given level of stimulation. Deep in the tissues, the carrier waveform is cancelled out,{{Fact}] resulting in a TENS-like signal deep under the skin.[citation needed]

Anecdotal evidence suggests that the IFC units may be useful for patients who have not had relief from TENS. However, IFC devices tend to be more expensive than TENS units.

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Interferential Specifications:

Pulse intensity: Adjustable 0-70mA peak into 500 ohm load each channel, constant current

Carrier Frequency: 4000Hz Fixed (CH1 and CH3)

Modulating Frequency: 4004-4160Hz Adjustable (CH2 and CH4)

Modes: Constant Mode: 4-160bps, Adjustable; Auto Sweep: 80-145 bps, 4-45 bps, 4-Set bps; Frequency Shift: 1/1 abruptly shift, 6/6 abruptly shift, 6/6 ramped, 10/10 abruptly shift, 10/10 ramped

Sweep Time: 15 seconds

Frequency Shift Percentage: Frequency shifts from 30% below set frequency to 60% above and return to 30% below set.

Interference Pulse Freq: 4-160 bps, Adjustable 4/bps/step

Pulse Duration 125us maximum

Wave Form: Symmetrical balanced Sine wave

EMS Muscle Stimulator Specifications:

3 Modes: Synchronous, Constant, Alternation

Pulse Amplitude: Adjustable 0-100mA peak into 500 ohm load each channel, constant current

Pulse Rate: 1Hz-160Hz (adjustable) 1Hz/step

Pulse Width: 300us fixed

Wave Form: Asymmetrical Bi-Phasic Square Pulse

Timer: 15,30,45,60 minute or selectable

On Ramp: Adjustable 1-8 seconds, 1sec/step

Cycle On Time: Adjustable 1-30 seconds, 1sec/step

Cycle Off Time: Adjustable 1-30 seconds, 1sec/step

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