Zynex Medical E-wave User manual

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Muscle Stimulation

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Caution:
Federal Law restricts this device to sale by or on the order of a practitio-
ner licensed by the law of the State in which he/she practices to use or
order the use of the device.
Table of Contents:
Get Started with the E-Wave Pg 4
Controls and Features Pg 4
Factory Settings Pg 6
Electrodes and Skin Care Pg 7
Batteries Pg 7
Indications Pg 8
Contraindications Pg 8
Safety Pg 8
Warnings Pg 9
Precautions Pg 10
Technical Specifications Pg 11
Customer Service / Supplies / Support Pg 3

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Zynex Medical
Contact Information
CUSTOMER SERVICE [phone]
Supplies: To order more electrodes or other accessories
Technical Support: Questions or problems with using your device
Device Return: Order a postage paid return envelope to return your
device at no charge
MAIN OFFICE [phone]
Billing Questions: Questions regarding insurance benefits and
covered benefits for durable medical equipment or
questions about an Explanation of Benefits form
you received in the mail
FAX NUMBER [phone]
MAILING ADDRESS
Zynex Medical
9990 Park Meadows Drive
Lone Tree, CO 80124
EMAIL [e-mail]
WEBSITE zynexmed.com

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Get Started with the E-Wave
Make sure the electrodes are placed properly on the skin (see “Electrodes and
Skin Care” for details) and that the lead wires are properly connected.
Turn on the unit by pressing ON for more than 1 second. A green light
indicates that the unit functions properly.
Keep pressing ↑on either channel until a comfortable level is reached, as
indicated by your physician or therapist.
To stop treatment, keep pressing ↓on the channel used until display and light
goes out after 1 additional second (mA will go to zero first). Thereafter
remove the electrodes and place them on the plastic pad.
Stimulation will run continuously until the treatment timer is changed or
the unit is turned off.
During treatment the display will show Remaining Time left on upper line
and Stimulation Level on lower line.
Controls and features.
Turn unit ON and OFF: Press ON for 1 second to turn the unit on. The
display will light up and the right LED will be constant green. Keep pressing
OFF to turn the unit off. It takes one additional second after reaching 0 mA to
turn it off. If no controls have been touched for 60 seconds with level at 0 mA
or 60 seconds after timeout, the E-Wave will automatically turn off.

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Setting Stimulation Level: Use the ↑and ↓controls to increase or decrease
the intensity. Do not use the PRG button. After 20 seconds the stimulation
level is electronically locked as a safety feature to prevent the patient from
unintentional increase in stimulation. To increase, just press ↓to reduce it by
at least 1 mA, which will unlock the safety feature. Thereafter you have 20
seconds to increase to desired level, before the lock is activated again. Any
change in level or mode will unlock this safety feature.
Setting Frequency: Press PRG once and use ↑or ↓to increase or decrease
the frequency.
Setting the Treatment Time: Press PRG three times and use ↑or ↓to select
the desired Treatment Time. Keep pressing ↓to set a Continuous Treatment
Time.
Setting the ON-Time: Press PRG four and use ↑or ↓to increase or decrease
the ON-Time.
Setting the OFF-Time: Press PRG five and use ↑or ↓to increase or decrease
the OFF-Time.
Setting the Ramp-Up: Press PRG six and use ↑or ↓to increase or decrease
the Ramp-Up.
Setting the Ramp-Down: Press PRG seven and use ↑or ↓to increase or
decrease the Ramp Down.
Setting Mode: Press PRG eight times and use ↑or ↓to toggle between
Simultaneous stimulation or Alternating stimulation between the two
channels.
Setting Waveform: Press PRG nine times and use ↑or ↓ to toggle between
Biphasic or monophasic waveforms (AC or DC).
SettingPulse Width: Press PRG twice and use ↑or ↓to increase or decrease
the pulse width.
Compliance data: Press PRG ten times and use ↓to display the usage time in
minutes and number of times used, when prompted by text in display. Only
stimulation levels above 5 mA are recorded as usage time. The compliance
meter can be reset by pressing ↑to show prompt in display and thereafter
press ↓twice to reset both parameters to zero.

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Return to factory settings: Press PRG eleven times and the display
will prompt the choice to reset all parameters to factory settings. This
is particularly useful if the user is unsure if the settings are correct and
is a good starting point for variations.
Factory settings are:
Frequency: 30Hz
Pulse width: 200 µsec.
On-Time: 6 seconds
Off-Time: 6 second
Ramp Up: 1 second
Ramp Down: 1 second
Timer: Continuous
Using the External Trigger Input: A standard external trigger, such
as a heel-switch, can be connected through the connector on the left
side of the unit. The Off-time is now disabled and a stimulation cycle
will only begin, when the switch is activated. The set parameters for
On-time, Ramp Up and Down will be in effect for a stimulation cycle.
This functionality is enabled as soon as the connector is inserted into
the E-Wave.

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Electrodes and Skin Care
Proper skin care will help make the use of this device more comfortable and
trouble-free. Prior to treatment, wash the areas where the electrodes will be
placed with mild soap and water, rinse and dry the skin thoroughly. If
necessary, remove excess body hair.
The E-Wave is intended to be used with re-usable, self-adhesive electrodes.
Extended number of uses can be obtained by adding water to the adhesive
surface immediately after each use and placing them on the plastic pad. They
will regain their conductivity and adhesiveness as compared to leaving them
dry.
Sterile electrodes may be required for some post-op applications.
Batteries
One 9 volt Alkaline battery is used. The battery compartment on the back of
the device opens by sliding the cover downwards. Please ensure to dispose
the used batteries properly.
Rechargeable batteries are not recommended as they only have a short usage
time and are not charged while in the device.

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Indications, contraindications, precautions, safety and warnings.
Safety References
Zynex Medical (Zynex) is only responsible for the safety, reliability and
function of the device when repairs, adjustments and changes have been
carried out by persons authorized by Zynex for such work and the device is
used according to the user manual. Repairs and technical safety tests shall
only be carried out by trained personnel.
Indications
This Zynex device has been designed for muscle re-education, prevention of
retardation of disuse atrophy, increase local blood circulation, maintain or
increase range of motion, relaxation of muscle spasms, and edema reduction.
Relaxation of muscle spasms.
Prevention or retardation of disuse atrophy.
Increasing local blood circulation.
Muscle re-education.
Immediate post-surgical stimulation of calf muscles to prevent venous
thrombosis.
Maintaining or increasing range of motion
This stimulator should only be used under supervision for adjunctive therapy
for the treatment of medical diseases and conditions.
Contraindications
• The device must not be used on patients with cardiac pacemaker.
• The device must not be used with stimulation over carotid sinus nerves.
• The stimulation must not be applied transcerebrally.
• The device must not be applied with undiagnosed pain syndromes until
etiology is established.
• This stimulator should not be used on patients with cardiac demand
pacemakers.
Electrodes should not be placed so that current will be applied to the carotid
sinus (neck) region or transcerebrally (through the head).

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Warnings
• The long-term effects of chronic electrical stimulation are
unknown.
• Stimulation should not be applied over the carotid sinus nerves,
particularly in patients with known sensitivity to the carotid sinus
reflex.
• Stimulation should not be applied over the neck or mouth. Severe
spasm of the laryngeal and pharyngeal muscles may occur and the
contractions may be strong enough to close the airway or cause
difficulty in breathing.
• Stimulation should not be applied transthoracically in that the
introduction of electrical current into the heart may cause cardiac
arrhythmias.
• Stimulation should not be applied transcerebrally.
• Stimulation should not be applied over swollen, infected, or
inflamed areas or skin eruptions, e.g., phlebitis, thrombophlebitis,
varicose veins, etc.
Stimulation should not be applied over, or in proximity to, cancerous
lesions.

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Precautions
• Safety of powered muscle stimulators for use during pregnancy
has not been established.
• Caution should be used for patients with suspected or diagnosed
heart problems.
• Caution should be used for patients with suspected or diagnosed
epilepsy.
• Caution should be used in the presence of the following:
1. When there is a tendency to hemorrhage following acute
trauma or fracture;
2. Following recent surgical procedures when muscle
contraction may disrupt the healing process:
3. Over the menstruating or pregnant uterus; and
4. Over the areas of the skin which lack normal sensation.
• Some patients may experience skin irritation or hypersensitivity
due to the electrical stimulation or electrical conductive medium.
The irritation can usually be reduced by using an alternate con-
ductive medium, or alternate electrode placement.
• Electrode placement and stimulation settings should be based on
the guidance of the prescribing practitioner.
• This device should be kept out of reach of children.
• This device should be used only with the leads and electrodes
recommended for use by the manufacturer.
• This device should not be used while driving, operating machin-
ery, or during any activity in which voluntary muscle contrac-
tions may put the user at undue risk of injury.
Adverse Reactions:
Skin irritation and burns beneath the electrodes are potential adverse
reactions.

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Technical Specifications
Amplitude: 0-100 mA
Frequency: 4-100 Hz
Factory setting is 30 Hz.
Pulse width: 50-300 µsec.
Factory setting is 200 µsec.
On-Time: 0.5 to 30 seconds
Factory setting is 6 seconds.
Off-Time: 0.1 to 60 seconds
Factory setting is 6 seconds.
Ramp Up: 0.1 to 6 seconds
Factory setting is 1 second.
Ramp Down: 0.1 to 6 seconds
Factory setting is 1 second.
Waveforms: Symmetrical biphasic or monophasic
selectable.
Treatment timer: Continuous, 10-100 minutes, in 10
minutes steps.
Factory setting is continuous.
Compliance meter: Records total usage time in minutes and
number of times used.
Can be reset.
Dimensions: 2.5 x 5.5 x 1.0 in.
Weight: 8 oz. incl. Battery.
Warranty: 3 Years manufacturers warranty on
materials and workmanship.
Accessories excluded.

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9990 Park Meadows Drive, Lone Tree, Colorado 80124
1-800-495-6670
www.zynexmed.com
P/N 300240 Rev 02