MedDex Solutions DeXtra User manual

Instruction Manual

Table of Contents
1. Introduction
2. Package Contents
3. Warnings and Precautions
4. Operating Instructions
a. General Description
b. Key Pad
c. Program Matrix
d. LCD Display
e. Load Detector
f. Low Battery Indicator
g. Memory
h. Automatic Power Off
5. Instructions for Use
a. Battery Placement
b. Electrode Connection and Placement
c. Beginning Treatment
6. Maintenance and Care
a. Guidelines for Optimal Performance
b. Checking System Performance
c. Battery Safety
d. Device Failure
7. Technical Data
8. Important Symbols
9. Limited Warranty and Disclaimer
a. Warning
b. Warranty
c. Limitation of Liabilities and Disclaimer of Warranties

1. Introduction
TENS stands for “Transcutaneous Electrical Nerve Stimulation.”
TENS is a battery powered device which sends small electrical
impulses through electrodes that are placed on the skin
to stimulate the sensory and motor nerves which provides
a sensory stimulus that blocks/reduces the perception of
pain. TENS is a non-invasive, non-addictive, drug-free pain
management system. TENS systems are designed for the
treatment of chronic, acute, and post-operative pain. The
relief you experience depends on how effectively you use the
system. When properly using TENS the results are immediate
and can be used for extended periods of time without negative
depends on the stimulator used and its proper application.
The instructions in this manual are designed to cover most
operational issues. However, if you have questions about your
particular situation, or if a problem arises, please contact your
physician or therapist.

2. Package Contents
1x DeXtra TENS Unit
1x Removable Belt Clip
2x Leadwires
1x Package of 4 Self-Adhesive Electrodes
2x AA 1.5v (Type LR6) Batteries
1x Instruction Manual
1x Storage Pouch

3. Warnings and Precautions
CAUTION
FEDERAL LAW (USA) RESTRICTS THIS DEVICE TO
SALE BY OR ON THE ORDER OF A PHYSICIAN SO
LICENSED BY THE STATE.
Never use the device if you suffer from any of the following:
- Epilepsy
- Pregnancy
- Malignant tumors
- Feverish conditions
- Contagious diseases
- Skin sensory disorders
- Blood pressure disorders
- Heart diseases or disorders
- Undiagnosed pain syndromes
- Varicosities, Phlebitis, or Thrombosis
Undiagnosed pain syndromes:
Avoid the use of TENS if your pain syndromes are
undiagnosed, until etiology (the cause or origin of a disease)
People wearing pacemakers:
The TENS stimulator could affect the ability of certain types
of cardiac pacemakers to work properly. TENS is not
reccomended if you wear a cardiac pacemaker.
Pregnancy:
The safety of the use of TENS devices during pregnancy has
not been established.
is established.

Heart patients:
Take adequate precautions before using the stimulator if you
suffer from heart diseases, as clinical data is not sufficient to
prove the safety of the use of TENS for these patients.
Monitoring equipment:
Avoid the use of TENS in post-operative recovery rooms if
you are on a heart monitor. Other electronic monitoring
equipment such as EKG monitors and EKG alarms may not
operate properly when TENS is in use.
:
Keep the unit away from sources of high magnetic fields such
as fields
may affect the functions of your TENS device and the TENS
Skin conditions:
Continued use of electrical stimulation in the presence
of skin irritation may be harmful. If skin rash or other
unusual symptoms develop while using the system, turn the
device off, remove the electrodes from your skin and seek
professional advice. Discontinue stimulation until the source
of skin irritation is determined. Consider moving the electrodes
to an adjacent position if you wish to continue stimulation.
Repotsitiming may be done routinely if the device is being used
to treat chronic pain.
Never use the device when engaging in any of the following
- Operating machinery
- Operating a vehicle
- Riding a horse or other animals
- If you are close to any
- Sporting or engaging in heavy activities
- Bathing/showering or swimming
LCD display.
activities:

Pain of central origin:
TENS is ineffective for pain of central origin including
headache.
Symptomatic treatment:
TENS is a symptomatic treatment and, as such, suppresses the
sensation of pain which would otherwise serve as a protective
mechanism.
Children:
Keep the system out of the reach of children.
Children under the age of 18 should not utilize TENS without
direct supervision of a prescribing physician.

ON/OFF Key
CH2 Intensity
UP/DOWN
Keys
CH1 Intensity
UP/DOWN
Keys
Pulse Freq.
UP/DOWN
Keys
Program Key
Timer
Key
4. Operating Instructions
a. General Description
DeXtra TENS is your personal Transcutaneous Electrical
Nerve Stimulator (TENS). The Dextra TENS provides the best
results when used with DexTrode brand electrodes. One (1) pair
of electrodes can be connected to each output channel using the
leadwires supplied. The stimulation pulses are transferred from
the device through the lead wires to the electrodes. The intensity,
pulse rate, mode of stimulation, and timer are all adjustable on
this device.
b. Key Pad
On/Off Key
Turns the device on or off. The output intensity in either
channel is set to zero when the device is initiated.
Time Key
Press TIMER KEY to change the timer setting. There are four
(4) selectable timer preset values (15min, 30min, 45min and
60min). Timer adjustment is not allowed when intensity is
greater than zero. The timer will start counting when intensity
is greater than zero. When the timer counts down to zero, the
device will turn off automatically.

Program Key
Press PROGRAM KEY to change to a different program. During
any program change, the intensity will return back to zero.
Intensity UP/DOWN Keys:
Adjust the output level of the device; two (2) sets of UP/DOWN
keys for the corresponding channel 1 and channel 2 intensity
adjustments.
Pulse Frequency UP/DOWN Key:
To activate pulse frequency adjust function, press either
FREQUENCY UP or DOWN KEY. The display will show
current pulse frequency and pulse width. Then, press the
PULSE FREQUENCY UP KEY to increase the pulse
frequency or press the PULSE FREQUENCY DOWN KEY
to decrease the pulse frequency. If no key is pressed for at
least five (5) seconds, the device will exit the pulse frequency
mode automatically.
The pulse frequency in programs 1, 2, 3, 4, 5, 7 and 8
has selectable pulse frequency adjustments from
1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,22,24,26,
28,30,35,40,45,50,55,60,65,70,75,80,85,90,95,100,105,110,
115,120,125,130,135,140,145,150 in 42 steps.

Burst
(Two Burst per second and each burst consists
of 7 pulses)
Burst
(One burst per two seconds and each burst
consists of 80 pulses)
Burst
(One burst per two seconds and each burst
consists of 130 pulses)
Burst
(Two burst per two seconds and each burst
consists of 25 pulses)
Burst
(One burst per two seconds and each burst
consists of 5 pulses for channel 1 and 110
pulses for channel 2)
Frequency Modulation
(From 15Hz to 150Hz in a 5 seconds period,
then from 150Hz to 15Hz in the next 5 seconds
and the same procedure continues)
LCD Display
c. Program Matrix
Program 1
Program 2
Program 3
Program 4
Program 5
Program 6
Program 7
Program 8
Program 9
Program 10
Program 11
Program 12
Program 13
Program 14
Remark: 42 selectable pulse frequencies:
1, 2, 3, 4, 5, 9, 10, 11, 12, 13,14, 15, 16, 17, 18, 19, 20, 22, 24, 26, 28, 30, 35, 40, 45, 50, 55,
60, 65, 70, 75, 80, 85, 90, 100, 105, 110, 120, 130, 140, 150Hz
Pulse
Frequency
(Hz)
120* 50 Constant
110* 100 Constant
130* 200 Constant
10* 225 Constant
5* 250 Constant
100-20-100 150
120* 50-250-50
80* 225
15-150-15 200
28 150
80 150
130 200
100 150
5Hz (Ch 1)
110Hz (Ch2) 200
Pulse
Width
(µz)
Description
Frequency Modulation
(From 100Hz to 20Hz in a 6 seconds period,
then from 20Hz to 100Hz in the next 6 seconds
and the same procedure continues)
Pulse Width Modulation
(From 50us to 250us in a 6 seconds period,
then from 250 to 50 in the next 6 seconds and
the same procedure continues)
Intensity Modulation
(From set intensity down 50% and back in a
10 seconds period)

d. LCD Display
The large Liquid Crystal Display (LCD) allows you to see all
the different settings that you are using.
e. Load Detector
To protect you from electrical shock, when there is no contact
between the device and human skin, the intensity will drop
to zero if the output level is greater than level 2. You will be
unable to increase the intensity greater than level 2 until a
proper connection is established once again.

f. Low Battery Indicator
A low battery indicator will be displayed on the LCD when your
batteries are too low to allow for the proper functioning of the
device. Please change the batteries when a low battery indicator
the device with a stable output.
g. Memory
The memory function records the last mode used and manual
settings selected on startup. When you restart the device, all
previous parameters remain, except for intenisty and timer.
appears in order to continue using
h. Automatic Power Off
When the device intensity level of both channels is at zero, and
the device has not been in use for approximately five (5)
minutes, the device will shut off automatically.

5. Instructions for Use
a. Battery Placement
WARNING: There is a risk of explosion if the batteries are
mix old and new batteries. Do not dispose of the batteries in a
Slide battery cover off by gently pressing on the triangular
ribbed area with your thumb and move down-wards. Insert
batteries, ensuring the positive and negative terminals are
correct as marked inside the battery compartment. Ensure that
the ribbon is left underneath the batteries as this will assist you
when the batteries need to be removed. Replace battery cover.
b. Electrode Connection and Placement
Please make sure that the unit is off before attaching the lead
wire cable and electrodes.
Insert the plug(s) situated at one end of the lead wire cable
into the socket provided at the front end of the unit. Attach
the pigtail wires on the self-adhesive electrodes to the red and
black pin ends of the lead wire cable. Place the electrodes onto
your skin before turning on the device.

How to place electrodes
A key to successful use of the device
placement for the electrodes. You may need to try several
your pain.
Before placing the electrodes on your skin, gently wash the
area with mild soap and water. Thoroughly rinse and dry the
area before placing the electrodes.
Precautions during electrode placement
Do not place electrodes over the mouth, near the heart
(transthoracic), or on broken skin.
Do not place electrodes over carotid sinus nerves, also located
in the neck region. Severe muscle spasms may occur which can
block airways.
head (transcerebral).
Never place or remove the electrodes while the system is on and
connected to the electrodes. Failure to comply can result in a
sudden unpleasant sensation on your fingertips.
As a general rule, place the electrodes directly over the area or
close to the area as possible from which the pain is emanating.
Placing the electrodes so as to encircle the pain site. Placing the
electrodes over specific points such as trigger points or
acupuncture points.

c. Beginning Treatment
A) Press the On/Off Key once to turn the unit on. At any time
during use, the unit can be immediately turned off by pressing
the On/Off Key once. To make sure that the unit is on and
working properly, check the display to see if characters appear
on the LCD display.
B) Press the Program Key to select a particular program.
C) Increase the intensity either on Ch1 or Ch2 or on both
channels by pressing the up arrow button on the intensity
control. If you want to reduce the strength, press the down
button. The intensity should be set to a level which is strong,
but not uncomfortable.
You will experience a tingling pins and needles sensation at
lower intensity levels and muscle contractions at higher levels.
D) Adjust the frequency to one of the several pre-set settings
available.
E) ff the unit,
remove the electrodes and return the electrodes onto its original
packaging.

6. Maintenance and Care
a. Guidelines for Optimal Performance:
- Change the battery regularly.
- Remove the battery if the unit is not to be used for a long
period of time.
-Avoid damaging the unit by dropping it or using it roughly.
- Do not immerse the unit in any cleaning solution, water or
- The unit should be wiped clean periodically using a dry cloth.
b. Checking System Performance:
- If your system does not seem to be operating properly,
y. Replacing the battery can eliminate
most operational problems.
- Make sure that the battery is not placed in the reverse polarity.
- Place the battery in the same direction as shown in the battery
compartment.
- Make sure that the leadwire is properly attached to the main
unit.
-
the leadwire.
- Make sure that the leadwire is not damaged or broken at any
point along the wire.
c. Battery Safety:
-To prevent injury or burns, do not allow metal objects to
contact or short circuit the battery terminals.
- Do not immerse the battery in any liquid, or dispose of the
battery
- Ensure that the battery is disposed of using the proper
facilities.
other liquid.

Device Failure:d.
In case of failure during the operation of the DeXtra,
Please DO NOT attempt to repair the device yourself.
When reporting a failure, please be prepared to provide the exact
make and model of your device (as indicated on the back of the device).
Only the manufacturer is permitted to repair the device.
please contact us at 800-660-6147.

7. Technical Data
Channels 2
Output 0-100 mA, peak to peak adjustable
Intensity in 20 steps at 500Ω load and 225μs
under 3.0 volts supply voltage
Frequency 42 selectable frequencies
from 1 Hz to 150 Hz
Pulse Width Fixed setting from 50 to 250μs
Output Symmetrical Bi-phasic Rectangular
Waveform
Output Constant, Burst, Frequency Modulation,
Modes Pulse Width Modulation and Intensity
Modulation
Timer 4 selectable settings: 15, 30, 45, 60 mins.
Power Supply 2 x 1.5V AA battery (Type LR6)

e manual carefully before usingPlease read th
Disposal of the appliance
Legislation requires that all electrical and
electronic equipment must be collected for
reuse and recycling. Electrical and electronic
equipment marked with the symbol indicating
separate collection of such equipment must be
returned to a municipal waster collection point
at the end of its service lifetime.
8. Important Symbols
Device with this symbol is an IEC/EN60601-1
type BF equipment. It provides a high degree
of protection against electric shock.
The device is intended for continuous use with
no degree of protection agaisnt water penetrtion.
the machine.
Please read the manual carefully before using