zewa 21021 User manual

1 FOREWORD
1.1 Introduction
The device 21021 is a single output channel Mini TENS&EMS device. Before
using, please read all the instructions in this user manual carefully and keep it safe
for future.
Mini TENS&EMS device belongs to the group of electrical stimulation systems. It
has two basic function – TENS (Transcutaneous Electrical Nerve Stimulation) and
EMS (Electronic Muscle Stimulation).
Function of the Mini TENS&EMS device: The device has 5 application programs
(3 TENS programs and 2 EMS programs) and applies electric currents in the low-
frequency range for therapy. The respective application program controls the
generated electric impulses, their intensity, frequency and frequency range. The
values for the respective program are listed on part 7.
The operation principle of electrical stimulation equipment is based on simulating
the body’s own pulses which are transcutaneously transmitted to nerve or muscle
fibers by means of electrode. The intensity of the single channel can be adjusted
separately and can be applied individually to one body region. The device has
single channel and one butterfly-shaped electrode, which allows you to stimulate
one muscle groups simultaneously with a large selection of standard programs.
The electrical pulse is transmitted to the tissue, then affect the transmission of
stimulation in nerve conduction as well as the Neuron and muscle tissue in the
field of application part.
1.2 Medical background
1.2.1 EXPLANATION OF PAIN
Pain is a warning system and the body’s method of reminding us that something
is wrong. Pain is important signal; without it abnormal conditions may go
undetected, causing damage or injury to vital parts of our bodies. Even though
pain is a necessary warning signal of trauma or malfunction in the body, nature
may have gone too far in its design.
This manual is valid for the 21021 Stimulator
Be sure to read this instruction manual before operation and keep properly.
This user manual is published by Zewa Inc
Zewa Inc does not guarantee its contents and reserves the right to
improve and amend it at any time without prior notice. Amendments will however be
published in a new edition of this manual.
All Rights Reserved.
21021 Rev. V1.0© 2014-Zewa, printed in June, 26,2014
Mini TEN&EMS Device
USER MANUAL
(For OTC PURPOSE)
Aside from its value in diagnosis, long-lasting persistent pain serves useless
purpose. Pain does not begin until coded message travels to the brain where
it is decoded, analyzed, and then reacted to. The pain message travels from the
injured area along the small nerves leading to the spinal cord. Here the message
is switched to different nerves that travel up the spinal cord to the brain. The pain
message is then interpreted, referred back and the pain is felt.
1.2.2 EXPLANATION OF TENS?
TENS (Transcutaneous Electrical Nerve Stimulation) gives good results in relief of
pain. It is clinically proven and used daily by physiotherapists, other caregivers and
top athletes around the world. High-frequency TENS activates the pain-inhibiting
mechanisms of the nervous system. Electrical impulses from electrodes, placed
on the skin over or near the painful area, stimulate the nerves to block the pain
signals to the brain, and the pain is not perceived. Low-frequency TENS stimulates
the release of endorphins, the body’s natural painkillers.
1.2.3 EXPLANATION OF EMS
Electrical Muscle Stimulation is an internationally accepted and proven way of
treating muscular injuries. It works by sending electronic pulses to the muscle
needing treatment; that causes the muscle to exercise passively. It is a product
derived from the square waveform, originally invented by John Faraday in 1831.
Through the square wave pattern it is able to work directly on muscle motor
neurons. The Ultra EMS System has low frequency and this in conjunction with the
square wave pattern allows direct work on muscle groupings.
2 SAFETY INFORMATION
2.1 Intended use
For program N1, B and H of TENS mode
To be used for temporary relief of pain associated with sore and aching muscles
due to strain from exercise or normal household work activities.
For program E1 and E2 of EMS mode
To be used to stimulate healthy muscles in order to improve and facilitate muscle
performance.
2.2 Contraindications
1) Do not use this device if you have a cardiac pacemaker, implanted defibrillator,
or other implanted metallic or electronic device. Such use could cause electric
shock, burns, electrical interference, or death.
2) The device should not be used when cancerous lesions or other lesions are
present in the treatment area.
3) Stimulation should not be applied over swollen, infected, inflamed areas or
skin eruptions (e.g. phlebitis, thrombophlebitis, varicose veins, etc.).
4) Electrode placements must be avoided that apply current to the carotid sinus
region (anterior neck) or transcerebrally (through the head).
5) This device should not be used over poorly enervated areas.
6) Inguinal hernia
7) Do not use on scarred areas following surgery for at least 10 months after the
operation
8) Do not use with serious arterial circulatory problems in the lower limbs
2.3 Warning
1) If you have had medical or physical treatment for your pain, consult with your
physician before using this device.
2) If your pain does not improve, becomes more than mild, or continues for more
than five days, stop using the device and consult with your physician.
3) Do not apply stimulation over your neck or mouth because this could
cause severe muscle spasms resulting in closure of your airway, difficulty in
breathing, or adverse effects on heart rhythm or blood pressure.
4) Do not apply stimulation across your chest because the introduction of
electrical current into the chest may cause rhythm disturbances to your
heart, which could be lethal.
5) Do not apply stimulation over, or in proximity to, cancerous lesions.
6) Do not apply stimulation in the presence of electronic monitoring equipment
(e.g., cardiac monitors, ECG alarms), which may not operate properly when
electrical stimulation device is in use.
7) Do not apply stimulation when in the bath or shower.
8) Do not apply stimulation while sleeping.
9) Do not apply stimulation while driving, operating machinery, or during any
activity in which electrical stimulation can put your at risk of injury; and
10) Apply stimulation only to normal, intact, clean, healthy skin.
11) The long-term effects electrical stimulation are unknown. Electrical stimulation
device do not have any curative value.
12) Stimulation should not be applied transthoracically in that the introduction of
electrical current into the heart may cause cardiac arrhythmias.
13) Stimulation should not take place while the user is connected to high-
frequency surgical equipment, that may cause burn injuries on the skin
under the electrodes, as well as problems with the stimulator.
14) Do not use the stimulator in the vicinity of shortwave or microwave therapy
equipment, since this may affect the output power of the stimulator.
15) Never use near the heat. Stimulation electrodes should never be placed
anywhere on the front of the thorax (marked by ribs and breastbone), but
above all not on the two large pectoral muscles. Here it can increase the risk
of ventricular fibrillation and lead to cardiac arrest.
16) Never use on the eye area.
17) Never use near the genitals.
18) Never use on the areas of the skin which lack normal sensation
19) Keep electrodes separate during treatment, electrode in contact with other
could result in improper stimulation or skin burns.
20) Keep the stimulator out of reach of children.
21) Consult your doctor if you are in any doubt whatsoever.
22) Discontinue and do not increase the intensity level if you feel discomfort
during use.
2.4 Precautions
1) TENS is not effective for pain of central origin including headache.
2) TENS is not a substitute for pain medications and other pain management
therapies.
3) TENS devices have no curative value.
4) TENS is a symptomatic treatment and, as such, suppresses the sensation of
pain that would otherwise serve as a protective mechanism.
5) Effectiveness is highly dependent upon patient selection by a practitioner
qualified in the management of pain patients.
6) The long-term effects of electrical stimulation are unknown.
7) Since the effects of stimulation of the brain are unknown, stimulation should
not be applied across your head, and electrodes should not be placed on
opposite sides of your head.
8) The safety of electrical stimulation during pregnancy has not been
established.
9) You may experience skin irritation or hypersensitivity due to the electrical
stimulation or electrical conductive medium (silica gel).
10) If you have suspected or diagnosed heart disease, you should follow
precautions recommended by your physician,
11) If you have suspected or diagnosed epilepsy, you should follow precautions
recommended by your physician.
12) Use caution if you have a tendency to bleed internally, such as following an
injury of fracture.
13) Consult with your physician prior to using the device after a recent surgical
procedure, because stimulation may disrupt the healing process.
14) Use caution if stimulation is applied over the menstruation or pregnant
uterus; and
15) Use caution if stimulation is applied over areas of skin that lack normal
sensation.
16) For single patient use only.
17) Keep yourself informed of the contraindications.
18) This stimulator is never use by patients who have noncompliant, emotionally
disturbed, dementia, or low IQ.
19) The instruction of use was listed, any improper use may be dangerous.
20) Caution should be used for patients with suspected or diagnosed heart
problems.
21) Isolated cases of skin irritation may occur at the site of the electrode
placement following long-term application.
22) Do not use this device at the same time as other equipment which sends
electrical pulses to your body.
23) Do not use sharp objects such as pencil point or ballpoint pen to operate the
buttons on the control panel.
24) To check the electrode connections before each use.
25) This device should be used only with the electrodes recommended for use
by the manufacturer.
2.5 Adverse Reactions
1) Possible skin irritation or electrode burn under the electrodes may occur.
2) On very rare occasions, first-time users of EMS have reported feeling light-
headed or faint. We recommend that you use the product while seated until
you become accustomed to the sensation.
3) If the stimulation levels are uncomfortable or become uncomfortable, reduce
the stimulation Intensity to a comfortable level and contact your physician if
problems persist.
3 GETTING TO KNOW YOUR DEVICE
3.1 Front Rear Panel
1) [ON /SET+] button
2) Program name
3) [OFF /SET-] button
4) Electrode buttons
5) Battery compartment
6) Tape for removing battery
7) Batter cover
3.2 Key Functions
[ON/SET+] Button
In standby state: turn on the device; in treatment state: to increase the output
intensity.
[OFF/SET-] Button
In power on state: press the button to select the treatment program; keep press
the button to 2 seconds to turn off the device; in treatment state: to decrease the
output intensity.
3.3 Accessories
No. Description Part No. QTY
1Pain Relief Plaster ED405 1 pc
2Self-adhesive Electrodes (28x 53
mm, Butterfly-shaped) AC-EP2853U 1 pc
3Ordinary batteries (1.5V, AAA) AC-1UAAAC 2 pcs
4User manual /1 pc
4 SPECIFICATION
4.1Technical information
Device name Multi-function TENS&EMS Device
Model/type
Power supply 3V d.c., 2x AAA batteries
Output Channel Single channel
Wave sharp Bi-phase square-wave pulse
Output voltage Max. 35Vpp (at 500ohm load)
Output current Max. 70mA (at 500ohm load)
Treatment time 30min
Output intensity 0 to 10 levels, adjustable
Number of program 5 programs: N, B, H, E1 and E2
Treatment mode: TENS and EMS mode
Operating conditions
5°C to 40°C with a relative humidity of 30%-
85%, atmospheric pressure from 700 hPa to
1060 hPa
Storage conditions -10°C to 50°C with a relative humidity of
10%-90%, atmospheric pressure
from 700 hPa to 1060 hPa Less than 10uA (At power o mode)
Dormancy current Less than 10uA (At power o mode)
Working current Less than 50mA (At the N1 program)
Dimensions 57x45x16.5 mm
Weight 20g (without batteries) 42g (with batteries)
Automatic shuto 3 minutes
Classication BF type applied part, internal power
equipment
Electrode detection function
The amplitude level will be reset to 0 V,
when the amplitude level is 1 or greater
and an open circuit at either channel is
detected.
Size of electrodes pad 3" X 4", Buttery-shaped
Output precision All the output parameters allow ±20% error
for the specification.
Technical specication
P.W. (pulse width) 200, 250us
P.R. (Frequency) 2, 80Hz (Hz=vibration per second)
Burst frequency 2Hz
Output characteristics Constant Voltage (CV )
Normal The pulse rate and pulse width output will
be constant based on the design value.
Han 2Hz/250us first output 3 sec. and then
output 3 sec. 80Hz/200us.
5 OPERATING INSTRUCTION
5.1 Battery
5.1.1 Check/ replace batteries
Open the battery cover, insert two batteries
(type AAA) into the battery compartment. Make
sure you are installing the battery properly. Be
sure to match the positive and negative ends
of the battery to the markings in the battery
compartment of device.
BE SURE TO MATCH THE POSITIVE AND NEGATIVE ENDS OF THE
BATTERY WITH THE MARKINGS IN THE BATTERY COMPARTMENT
OF UNIT.
5.1.2 Disposal of battery
Spent batteries are not belong to the household waste. Dispose of
the battery according to the current regulations. As a consumer, you
have legal obligation to return spent battery to the Recycle Bin.
Caution:
1. If a battery was swallowed please seek medical attention immediately!
2. In case of battery leakage, please avoid contacting the battery with skin, eyes
and mucus membranes, once contacting leakage, please wash the contact
part with plenty of clean water and contact your doctor immediately.
3. Battery can not be dismantled, thrown into fire or short-circuited.
4. Protect battery from excess heat; Take the battery out of the product if they
are spent or if you don’t use it for a long time. This can prevent device damage
because of the battery leakage.
5. Replace all of the batteries simultaneously!
6. Always replace the device with same type battery.
5.2 Connect electrode to device
Before proceeding to this step, be sure the device is completely turned OFF.
Connect the electrode to the electrode button of stimulator correctly. Please see
following photos for the correction connecting method.
Caution:
Always use the electrode which is comply with the requirements of the IEC/
EN60601-1, ISO10993-1/-5/-10, such as the electrode with CE mark, or which are
legally marketed in the US under 510(K) procedure.
5.3 Place electrodes on skin
Place the electrode on the part you need treatment, and base on the instructions
of this user manual. Before use, please
make the skin that need treatment and the
silica gel of electrode clean and humid, to
prevent the discomfort that cause by dry
skin. Please ensure the skin and electrode
connection well.
Caution:
1. Please turn off to prevent electric shock when pre-moving the treatment
position of the electrode.
2. Before applying the electrode, it is recommended to wash and degrease the
skin, and then dry it.
3. Never remove the electrode from the skin while the stimulator is still treating.
4. Only use the electrodes that provided by the manufacturer, use other
accessories could result in injury to the patient.
5.3.4 Electrode placement
FDES106 is a kind of OTC stimulator, suitable for home
use, you only need to use according to the user manual,
place the electrode on the position where you feel pain
and need to exercise, treating and adjusting base on
your own feeling.
The dierent programs with corresponding applicable
symptoms as below:
Program No. Applicable disease symptoms Applicable Location Diagram
NShoulder pain
Arm pain
Elbow pain
4. Low back pain
BShoulder pain
Arm pain
Elbow pain
4. low back pain
Same as N, but the stimulation
is blander.
HShoulder pain
Arm pain
Elbow pain
4. Low back pain
Same as N, but the stimulation
strength is between N and B.
E1 Applicable for buttocks, thigh
and leg:
improve and facilitate muscle
performance.
E2 Applicable for hand, arm and
abdomen:
improve and facilitate muscle
performance.
6 INSTRUCTIONS FOR USE
6.1 Turn on
When use for the first time, open the battery cover and load two new batteries
(Please kindly review item 5.1.1 for the operating steps and schematic diagram)
Then press the [on/set+] button to turn the device on, and the default “N”
program indicator LED will be lighting.
6.2 Select the application program
In the state of power on, press【o/ set -】to switch the current application pro-
gram. The LED indicator of corresponding program will lighten when switching
Declaration of conformity:
Zewa Inc declares that the 21021
complies with following normative documents:
IEC 60601-1, IEC 60601-1-2, IEC 62304, IEC 62366, IEC 60601-1-11,
IEC 60601-2-10, ISO 10993-5, ISO 10993-10
21021
21021
Zewa Inc