LGMedSupply LG-7000 User manual

INSTRUCTION MANUAL
INSTRUCTIONMANUAL
LG-7000
Digital TENS Unit
FDA 510K
Distributed by:
V1.0
LGMedSupply.com
POBox 913
Cherry Hill, NJ 08003
www.lgmedsupply.com

1
INDEX
1. Introduction ......................................................... 2
2. Cautions ............................................................... 3
3. Warnings .............................................................. 4
4. Contraindications ................................................ 5
5. Adverse Reactions .............................................. 5
6. General Description ............................................ 5
7. Construction ........................................................ 6
8. Technical Specifications ..................................... 8
9. Replaceable Parts................................................ 11
10. Accessories ........................................................ 11
11. Graphic Symbols ................................................. 12
12. Operating Instructions ....................................... 12
13. ParameterControls ............................................ 13
14. Attachment of Electrode Lead Wires ................ 15
15. Lead Wire Maintenance ...................................... 15
16. Electrode Options................................................ 16
17. Electrode Placement ........................................... 16
18. Tips for Skin Care ............................................... 17
19. Application of Reusableself adhesive
electrodes ........................................................... 18
20. Adjusting the Controls ....................................... 19
21. BatteryInformation ............................................. 24
22. Maintenance, Transportation, and
Storage of the Device.......................................... 25
23. Safety-Technical Controls .................................. 26
24. Malfunctions ........................................................ 26
25. Conformityto SafetyStandards ........................ 27
26. Warranty ............................................................... 27
Chapter Contents Page

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therapy,and the type ofpain. Inmany patients,thereduction or
elimination of pain lasts longer than the actual period of stimulation
(sometimes as much as threeto fourtimes longer). In others, painis
onlymodified whilestimulation actuallyoccurs. You may discuss
thiswithyour physician or therapist.
IMPORTANT SAFETY INFORMATION!
Read instruction manual beforeoperation. Be suretocomplywith all
CAUTIONS”and WARNINGS”in the manual. Failure to followin-
structionscan cause harmtouser or device.
Chapter 2: CAUTIONS
1. Federallaw(USA) restricts this device to sale by or on the order
ofaphysician.
2. Do not use this device for undiagnosed pain syndromes until
consulting aphysician.
3. Patients with an implanted electronicdevice, suchas acardiac
pacemaker, implanted defibrillator, or any other metallic or elec-
tronicdevice should notundergo TENS treatment without first
consulting adoctor.
4. Patients with heart disease, epilepsy, cancer or any other health
condition should notundergo TENS treatment without firstcon-
sulting a physician.
5. Stimulation delivered by this device may be sufficient to cause
electrocution. Electricalcurrent of thismagnitude mustnot flow
through the thorax or across the chestbecauseit may causea
cardiac arrhythmia.
6. Donot place electrodes on the front of the throat as spasmof the
Laryngeal and Pharyngeal muscle may occur. Stimulation over
the carotidsinus (neck region) may close the airways, make
breathing difficult,and may have adverseeffects on the heart
rhythm or blood pressure.
7. Do not place electrodeson your head or at any sites that may
causethe electrical currenttoflow transcerebrally(through the
head).
Chapter 1 : INTRODUCTION
EXPLANATION OF PAIN
Painis awarning systemand the body’smethod oftelling usthat
something iswrong. Painisimportant; without it abnormal condi-
tions may go undetected, causing damage or injury tovitalpartsof
our bodies.
Even though painis anecessary warning signaloftraumaor mal-
functioninthebody,naturemay havegonetoofarinits design.
Aside fromits value in diagnosis, long-lasting persistent pain serves
no useful purpose. Pain does not begin until codedmessage travels
to the brain where it is decoded, analyzed, and then reacted to. The
painmessage travels fromthe injured area along the small nerves
leading to the spinal cord. Here the message is switched todiffer-
ent nerves that travel up the spinal cord to thebrain. Thepain
message is then interpreted, referred back and the pain isfelt.
EXPLANATION OF TENS
Transcutaneous ElectricalNerve Stimulationis a non-invasive, drug-
free method of controlling pain. TENS uses tiny electrical impulses
sent through theskin to nerves to modify your pain perception.
TENS does not cure any physiological problem; it only helps control
the pain. TENS does not workfor everyone; however,in most
patients it is effective in reducing or eliminatingthe pain, allowing for
areturn to normal activity.
HOWTENSWORKS
Thereisnothing magic”aboutTranscutaneousElectrical NerveStimu-
lation (TENS).TENSisintended tobe used torelieve pain.The TENS
unit sends comfortable impulses through the skin that stimulate the
nerve (or nerves) inthe treatment area. In many cases,this stimu-
lation will greatly reduceor eliminatethe pain sensation the patient
feels. Pain reliefvaries byindividual patient, modeselectedfor

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Chapter 4: CONTRAINDICATIONS
1. Do not use TENS over the carotid sinus (neck) region.
2. TENS devices can affectthe operation ofdemand type cardiac
pacemakers.
3. Do not usethe TENS deviceif you have heart diseasewithout
consulting your physician.
4. Do not stimulate on the site that may cause currentto flow
transcerebrally –(through the head).
5. Donoapply TENS for undiagnosed painsyndromes untiletiology
is established.
Chapter 5: ADVERSE REACTIONS
Skin irritation and electrode burns are potential adverse reactions.
If skin irritation occurs, discontinue use and consult your physician.
Chapter 6:GENERAL DESCRIPTION
TheLG-7000DigitalTENS Unitisa battery operated pulsegenerator
thatsends electricalimpulsesthrough electrodestothe body and
reachesthe nervescausing pain.The deviceis provided withtwo
controllableoutputchannels, eachindependent ofeachother.An
electrode pair can be connected to eachoutput channel.
The electronics ofthe LG-7000 Digital TENSUnit createelectrical
impulseswhose Intensity, duration,numberpersecond and
modulation may be altered with thecontrols/switches. Press buttons
are very easy to use and the large liquid crystal display showing the
exact modeand values ofparametersare veryconvenient for patients.
8. Thisdeviceshouldnotbeused whiledriving, operatingmachinery,
close to water, or during any activity in which involuntary muscle
contractions may put the user at undue riskof injury.
9. Turn the TENS off before applying or removing electrodes.
10.Isolated cases of skin irritation may occur at the site of electrode
placement following long term application. If this occurs, discon
tinue useand consultyour physician.
11.If TENS therapy becomes ineffective or unpleasant, stimulation
should bediscontinued untilits use is re-evaluated byaphysician
12.Keep thisdevice out of the reachofchildren.
13.LG-7000 DigitalTENS Unit devices have noAP/APG protection.
Do not use it in the presence ofexplosive atmosphere and flam-
mablemixture.
Chapter 3 : WARNINGS
1.TENS devicesshould be used only under the continued superv-
ision of aphysician.
2.TENS devices have no curative value.
3. TENSis a symptomatic treatment and as such suppressesthe
sensation ofpain,whichwould otherwiseserve asaprotective
mechanism.
4.TENS is not effective for pain of central origin. (This includes
headache.)
5. Electronicmonitoringequipment(such asECGmonitorsandECG
alarms) may notoperate properly when TENS stimulation is in
use.
6. Caution should be used in applying TENS to patients suspected
of having heartdisease. Further clinical data isneeded to show
there are no adverseresults.
7. Electrodesshould not be placed over the eyes,in the mouth, or
internally.
8. Do not usewhile sleeping
9. Do not useduring pregnancy unlessdirected by your physician.

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BACK
(9) BATTERYSTRIP
(10) BATTERYCASE
(11) BELTCLIP
SIDE
(12) PROTECTIVE COVER
BACK SIDE
Chapter 7 : CONSTRUCTION
FRONT
(1)LEADCONNECTOR
(2)INTENSITYCONTROL(ON/OFFSWITCH)
(3)PANELCOVER
(4)LIQUIDCRYSTALDISPLAY
(5)MODECONTROL
(6)SETCONTROL
(7)INCREMENTCONTROL
(8)DECREMENTCONTROL

98
pulsewidth in40% range. The intensityis
alwaysincreasing whilethe pulsewidthis
decreasing and vice versa. The intensity is
decreased by 40% while the pulsewidth is
increased by 40% in 5seconds. In the next
5 seconds, the intensity isincreased by40%
while the pulse width is decreased by 40%.
Totalcycle time is 10 seconds. Pulse rate
(2~150Hz) and pulsewidth(50~300µs)
are fullyadjustable.
15 SD2Mode TheSD2(Strength-Duration)modeconsists
of automatic modulation intensity and pulse
width in 70% range. The intensity is always
increasingwhilethe pulse width is decreas-
ing and vice versa.The intensity is decrea-
sed by 70% whilethe pulse width isincre-
ased by 70%in5seconds.In the next 5
seconds,the intensityis increasedby 70%
while the pulse width is decreased by 70%.
Totalcycle time is 10 seconds. Pulse rate
(2~150Hz) and pulsewidth(50~300µs)
are fullyadjustable.
16 Timer Adjustable, from1 to 60 minutes or Contin-
uous. Adjustable in 1minute each step from
1to 15minutes and 5minutes each from15
to 60 minutes. Treatment timecountdown
automatically.
17 Patient This unitcan store 60 sets of operation
ComplianceMeter records.Total recorded timeis999 hours.
18 LowBattery Alow battery indicator will show up on
Indicator the LCD when the battery is low.
19 Operating Temperature:0°~40°C
Condition Relative Humidity: 30%~75%
Atmosphere Pressure : 700Hpa~1060Hpa
20Remark Theremaybea+/-5%toleranceof allparame-
Chapter 8 : TECHNICAL SPECIFICATIONS
The technical specification details of LG-7000 Digital TENS Unit are
as follows:
MECHANISM TECHNICALDESCRIPTION
01. Channel Dual,isolated between channels
02. PulseAmplitude Adjustable, 0-100 mA peak into 500 ohm
load eachchannel.
03. Wave Form Asymmetrical Bi-Phasic Square Pulse
04. Voltage 0 -50V (Load:500 ohm)
05. Power source One 9Volt Battery.
06. Size 10.1cm(L) x6.1cm(W)x2.45cm(H)
07. Weight 150 gramswithbattery.
08. Pulse Rate Adjustable, from 2 to 150 Hz, 1 Hz/step
09. PulseWidth Adjustable, from50 to 300 µs
microseconds,10µs/step
10. Modes B(Burst), N(Normal), M(Modulation), SD1
(Strength Duration), SD2
11. Burst Mode Burst rate: Adjustable, 0.5 –5Hz
Pulse width adjustable, 50~300µs
Frequency fixed = 100 Hz
12 NormalMode The pulse rate and pulsewidthare
adjustable. It generates continuous stimul-
ation based on the setting value.
13. ModulationMode Modulation modeis a combination of pulse
rate and pulse width modulation.
The pulserate and width are automatically
varied in a cycle pattern. The pulse width is
decreased by 50% fromitsoriginal setting
in 0.5 second, then the pulse rate is decre-
ased by 50% from itsorignal setting in 0.5
second. Totalcycletimeis 1 second.Inthis
mode,pulserate (2~150Hz) and pulse width
(50-300µs)are fully adjustable.
14 SD1Mode The SD1(Strength-Duration) mode consis-
ts of automatic modulation intensity and ters and +/-20% toleranceof amplitude &
voltage

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Chapter 9 : REPLACEABLE PARTS
Thereplaceable parts andaccessoriesof LG-7000 Digital TENS Unit
devicesare asgiven below –
Except leads, electrodes,battery and battery case cover,please do
nottry oreplacethe other parts of adevice
PARTS
01 LEADWIRES
02 ELECTRODES
03 9VBATTERY ,TYPE 6F22
04 BELTCLIP
05 BATTERYCASECOVER
06 LEADCONNECTOR
07 MAINPCB
08 INTENSITY KNOB
09 LCDCOVER
10 INTENSITYCONTROLCOVER
Chapter 10 : ACCESSORIES
EachLG-7000DigitalTENS Unit comes completewith standard
accessoriesand the standard labels asgiven below:
I. Accessories
REF.NO. DESCRIPTION Q’TY
1. KS4040 40 X40 mm Adhesive Electrodes 4 pieces
2. KE-26 Electrodes Leads 2 pieces
3. GC-01 9 V Battery, type 6F22 1 piece
4. Instruction Manual 1 piece
5. Carrying Case 1 piece
The waveforms ofthe 5stimulation modes are as follows.
1. Burst
2.Normal
3. Modulation
4. SD1 (Strength-Duration)
5. SD2 (Strength-Duration)

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5) Slowly turn onthe LG-7000 Digital TENS Unit by rotating the I
ntensity control(ON/OFFSwitch) knobs.
6) Select the mode and settings as directed by your physician.
7) Slowlyincreaseor decreasethe intensityasdirected by your
physician by rotating the Intensity control (ON/OFF Switch)clock
wise toincrease,counter clockwisetodecrease.
8) Aftertreatment, turntheLG-7000Digital TENSUnit off byrotating
the Intensity control(ON/OFFSwitch) counter clockwiseto the
zero setting.
Chapter 13 : PARAMETER CONTROLS
PULSEDURATION
Widerpulse duration settings will deliver stronger stimulation for any
givenintensitysetting.As mentioned in theControls section,by
usingacombinationof intensityandpulse duration,it is felt that
various pulsewidths are capableofstimulating differentgroups of
nervefibres.
Thechoiceofwhichpulsedurationto useispartiallydependent
upon the Treatment Mode and Protocol selected (refer to the appro-
priatesection).
PULSERATE
The Pulse Rate (hertz or pulses per second) chosendepends greatly
upon the type of electrode placement given to the patient.
When using contiguous and dermatomeelectrode placements (i.e.
stimulating directly through the area of pain or localized enervation),
aquick pulserate (settinggreater than80Hzonthe Pulse Rate
Control)is desired.Thepatient shouldnotperceiveindividual pulses
but rather have the sensation ofsteady continuous stimulation.
Despiteabove recommendations, eachindividualpatientmayre-
quire slight variationsof the above settings, according to the nature
of theircondition and the direction of theirphysician.
II. LABEL
The label attached to the backof
devicecontains importantinfor-
mation aboutthis device- model,
supply voltage and caution. Please
do not remove.
Chapter 11 : GRAPHIC SYMBOLS
1. Degreeof Electrical Protection BF
2 Do not insert the plug intoAC power supplysocket.
3. Timer
4. Low Battery Indicator
5. Increment
6. Decrement
Chapter 12: OPERATING INSTRUCTIONS
1) Insert the9V battery into the LG-7000DigitalTENS Unit’s battery
compartment. Make sure to remove the plasticseal on the 9V
battery. Line up thepositiveand negative terminals on thebattery
with their corresponding terminals in the LG-7000 Digital TENS
Unit. Make sure that both Intensity control (ON/OFFSwitch)
knobs are in the offposition.
2) Insert the lead wiresintothe lead wire socketson top of the
LG-7000 Digital TENSUnit.
3) Open the electrode package. Then insert each lead wire pin into
the pigtail of the electrodes.
4) Place the electrode on your body as directed by your physician.

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Chapter 14 : ATTACHMENT OF ELECTRODE
LEAD WIRES
The wires provided with the system insert into the jack sockets
located on top ofthe device.Holding the insulatedportion of the
connector, pushthe plug end of the wire into one ofthe jacks (see
drawing);one or two setsofwires maybeused.
After connecting the wiresto the stimulator, attacheachwire to
an electrode. Use care when you plug and unplug the wires.
Jerking the wire instead ofholding the insulated connector body
may causewire breakage.
CAUTION
Donotinsert theplugofthe patientlead wire intoanyACpower
supplysocket.
Chapter 15: LEAD WIRE MAINTENANCE
Clean the wiresby wiping with adampcloth.Coating them lightly
withtalcumpowder willreducetangling and prolong life.
TREATMENTMODE
Normal or Conventional TENS offers the practitioners complete con-
trol over all the varioustreatment parameters of the instrument.
Burst Modeis analogous to theLow Rate TENStechniqueexcept the
lowfrequencyindividualpulsesare replaced by individual bursts”
of 7-10 individualpulses. Itis thus acombination of Conventional
TENS andLow Rate TENS. In Burst Mode, the treatment frequency
isfixed by the instrumentand isnot adjustablewiththe Frequency
Rate control.
Modulated Mode attempts to prevent nerve accommodation by con-
tinuouslycycling the treatment intensity.When usingModulated
Mode increasethe intensityonlywhen the unitis atthe maximum
intensity of the modulation cycle. If the intensity is increased during
alow intensityperiodofthe modulationcycle,thepatient should
increase the intensity slowly untilthe modulation cyclereaches the
maximumtoinsurea true maximumintensity output.
Strength-Duration Modulation (SD1 &SD2) consists ofalternating
modulatedamplitudeandwidthsothatoneparameterisalways
decreasing while the other isincreasing and vice versa. The ampli-
tude decreases fromthe amplitude control setting and returns to that
setting. The width decreases from thewidth control setting and
returns to that setting.
TIME DURATION
The onset of painrelief shouldoccur shortlyafter the intensity set-
ting has been determined. However, in some cases, pain relief may
take as longas30minutestoachieve.TENSunits aretypically
operatedfor longperiods of time, witha minimumof 20–30minutes
and in somepost-operation protocols,as long as 36 hours.
Ingeneral, pain relief will diminish within 30 minutesof thecessation
of stimulation.

1716
through the limband thus through the endogenous pain site.
Withatwo channel application,the physician may either directthe
currentflow tocross through the painsiteor,inwhatis called the
bracket”methodallowing the current flowon either side of the
painful area, generally through the nerve branches that feed into the
pain site.
Chapter 18: TIPS FOR SKIN CARE
Toavoidskinirritation,especiallyif you have sensitive skin, follow
thesesuggestions:
1. Wash the area of skinwhere you will be placing the electrodes,
using mild soap and water before applying electrodes, and after
takingthemoff. Besure to rinse soap off thoroughlyanddry skin
well.
2. Excesshairmay be clipped with scissors; do not shave stimul-
ation area.
3. Wipe the area with the skin preparation your physician has
recommended. Letthisdry.Apply electrodes as directed.
4. Manyskin problems arise fromthe pulling stress”fromadhesive
patchesthatare excessivelystretched across the skinduring
application.Topreventthis, applyelectrodesfromcentreoutward;
avoidstretching over the skin.
5. Tominimize pulling stress”,tape extra lengths of lead wires to
the skinin a loop to prevent tugging on electrodes.
6. When removing electrodes, always remove by pulling in the di-
rection of hairgrowth.
7. It may be helpful to rub skin lotion on electrode placement area
when not wearingelectrodes.
8. Never applyelectrodes over irritated or broken skin.
Chapter 16 : ELECTRODE OPTIONS
Theelectrodes aredisposableandshould beroutinely replaced
after 3-4uses. If youare unsureofyour electrodeadhesive
properties,order replacement electrodes.Replacement electrodes
should be re-ordered through LGMedSupply.com(888-633-7360) to
ensure properquality.Followapplication procedures outlinedin
electrodepacking,to maintain optimalstimulation andtopreventskin
irritation.
Chapter17:ELECTRODEPLACEMENT
The placementof electrodes can be one of the mostimportant pa-
rameters in achieving success with TENS therapy. Of utmost impor-
tanceisthe willingnessof the physician to try the various styles of
electrode placement to find which method best fitsthe needs of the
individual patient.
Every patientresponds to electrical stimulation differentlyand their
needsmay vary from the conventionalsettings suggested here. If
theinitialresults are notpositive, speak toyourphysicianabout
alternative stimulation settings and/or electrode placements. Once
an acceptable placement has been achieved, mark down the elec-
trodes sitesand the settings,so thepatientcaneasily continue
treatment at home.
CONTIGUOUS PLACEMENT
This is the most common placement technique.It involves placing
the electrodesalongside the area oflocalized painsite,insucha
wayastodirect the flow ofcurrentthroughor aroundtheareaof
pain.
In a single channel application, this would involve placing each pad
on either side ofthe painsiteif the painis localized on alimband
deep within the tissue. Pad placement on the posterior and anterior
aspects of the affected limb will allowthe currentto flowcompletely