3. Electricity is an
element of PT
modalities most
frightening and least
understood.
Understanding the
basis principles will
later aid you in
establishing treatment
protocols.
4.
5. • Amplitude window
• Frequency window
• Acute window
• chronic window
• Energy based window
• Time based window
• Interval based window
6. 420B.C-hippocrates-in torpaedo fish
46A.D-scribonius largus-gout/headache
1700-luigi galvani & alessantro volta
1745-leyden jar for ES
1831-michael faraday
1850s-duchene-motor points(father of ES)
1909-rheo/chron-louis
1916-SD curve-Adrian
FES-1961-liberson
1962-HVPC-robert becker
8. Widely used electrotherapy modality
Used since the 1950s to utilise the therapeutic
aspects of low frequency currents without the
discomfort
9.
10. Two medium frequency currents of slightly
differing frequency are applied to the body
in such a manner to produce;
an amplitude modulated medium frequency
current within the body.
Amplitude modulation provides a beat
frequency that is within the biological
frequency range
14. 1.
Z=1/2Π fC
,Z = skin impedance
f = frequency in Hertz (Hz)
C = capacitance of skin in microfarads
15. Skin impedance is of two types
ohmic resistance and
capacitive resistance.
Capacitive resistance is developed deep in the tissues due to
electrolytic potential difference generated in the cell membrane
16. 2.Accomodation is delayed.
3.Current can travel at the depth of the tissue.
4.Alternating current can be used
5. Stimulus asynchronous stimulation is applied for production of interferential
current so Wedensky inhibition doesn’t takes place and thereby there is no
accommodation phenomenon.
Stimulus asynchronous produces Gilde-Meister effect.
(In low-frequency currents, stimulus synchronous is used which causes
Wedensky inhibition and thus nerve or muscle gets accommodated to that
current.
Inability of tissue to respond during the refractory period due to stimulus
synchronus current is known as Wedensky inhibition)
19. Electrodes placed so that the
two circuits produce an interference
current and the patient experiences
the tingling sensation on and around
the site of their problem
Left knee
21. 4KHZ-pain relief
2KHZ-muscle stimulation
Pre modulated/4EL
Able to penetrate tissues with little resistance
No accomadation/gildemeister effect
22. 100Hz - pain relief
50-60 Hz = muscle contraction
1-50 Hz = increased circulation
The higher the frequency (Hz) the more quickly
the muscle will fatigue
1-4 Hz-beta endorphin
40-100Hz-enkepalin,serotonin
23. Interferential current is commonly used for pain
relief
Relief of muscle spasm
Promote tissue healing
Relief from edema
Re-education of deeply situated
Muscles.
24. Facialnerve neuritis
Orthopedic conditions
Pain-LBP.jaw pain,OA pain,fibromyalgia
( same like tens)
Gynecological problems-incontinence
DOMS
Edema
Post surgical pain
Bone healing
26. Relief of pain – pain gate theory
80-140Hz (higher IFT frequencies)
Stimulates Aβ fibres
To inhibit impulse transmission in A∂ and C
fibres
Used for both acute and chronic pain
Temporary pain relief
27. Relief of pain – Ascending pain suppression,
2-30Hz (lower frequencies)
Stimulates A∂ fibres:
To inhibit C fibre transmission
Via the release of encephalins and endorphins
More longer lasting pain relief
Only effective on chronic pain
28. Reduction of oedema 0-100 Hz
Stimulates autonomic nerves to produce
vasodilatation
Increases circulation
29. Motor stimulation
0-25 Hz - twitch
25-100 Hz - muscle contraction
Can be used to treat incontinence or
muscle weakness secondary to trauma/
surgery (in conjunction with active
exercise).
30. Acute sepsis - ↑ risk of spread of infection
Tumours - ↑ risk of increased growth of activity
Pregnancy – no treatment over uterus or its’
nerve supply
Cardiac disease – no treatment over the heart,
cervical ganglia or vagus nerve
31. Cardiac pacemakers
Febrileconditions
Large open wounds
Menstruation - ↑ risk of bleeding or pain if treatin
abdominal of lumbar region
Dermatological conditions-open wound,cuts or
eczema
Thrombophlebitis – risk of embolus being
dislodged
32. Severe ↑ or ↓ BP – avoid lower cervical
region – BP control via cervical ganglia
Acute inflammation, oedema, haemorrhage
or haematoma when using suction cups
Hypersensitivity or fear of electrical
treatment
Patients who are unable to understand the
treatment or what is required of them
34. Burns – high intensity currents can cause sufficient
heating to cause a burn.
Mains current shock – faulty equipment
Electric shock – abrupt application of high intensity
current – turn current up/ down slowly
General malaise
Nausea
Vomiting
Dizziness / Faintness
Migraine / Headache
Neurological effects
35. Metal implants are not the
contraindications of
interferential therapy
38. Laser + Ultrasound + IFT Machine
performing
interferential therapy A patient receiving ICT
with suction pads to Tens Med Fit Mini 4 Pole Inferential Stimulator (IF)
(Interferential Current Therapy)
reduce swelling and
for pain in hand
alleviate pain.
39. Professional Interferential Unit With AC Adapte
Ultra IF - Interferential U
Electrode placement of interferential therapy in plantar fasciatis
42. Russian currents are alternating currents (AC)
at a frequency of 2.5 kHz that are burst
modulated at a frequency of 50 Hz with a 50%
duty cycle. The stimulus is applied for a 10-
second “on” period followed by a 50-second
“off” or rest period, with a recommended
treatment time of 10 minutes per stimulation
session.1 This stimulation regimen (called the
“10/50/10” regimen), applied once daily over a
period of weeks, has been claimed to result in
force gains, but many of the claims appear to be
anecdotal
43. We believe some of the popularity of Russian
electrical stimulation stemmed from a talk
given by Russian scientist Dr Yakov Kots13 at
a conference in 1977. Kots is reported to have
advocated a stimulus regimen for increasing
muscle force that he claimed was able to
increase the maximum voluntary contraction
(MVC) of elite athletes by up to 40%.
Unfortunately, the only details of Kots'work
were brief conference notes, translated from
Russian and not readily accessible.13
45. Frequency Analysis Method
The external currents with different
frequencies are considered to cause different
effects in tissues. Thus we assume that tissue
reactions on different frequencies in different
states of the body will also differ from each other.
Measuring the sensory, motor and pain thresholds
by stimulating the tissue with the interference
current may offer a diagnostic tool in
physiotherapy and rehabilitation
46. Pain control treatment
Can cause muscle contractions, but that is not why
it is used
Decreases patient’s pain perception by decreasing
the conductivity & transmission of noxious
impulses from small pain fibers (effects large
diameter fibers)
Moderate caffeine levels (200 mg, approx 2-3 c.
coffee) may decrease effectiveness of TENS
60. Appropriate placement according to the
condition &patient
Use adhesives &straps
Apply gel evenly on electrode
Maintain good contact with the skin
No leads crossing each other
Confirm connections &above all
61. Instructions Warnings
Don’t move Inform more
Don’t sleep heating/uncomfort
Don’t touch leads, able sensations
Inform burning
apparatus, therapist
and any other metal sensation
near by you immediately
62. Proper execution of treatment
Appropriate intensity should be used
Set duration of treatment acc. to condition
status
Supervise the treatment through out the
session
63. Put knobs to zero
Remove electrodes
Switch off the machine &mains
Clean the area &inspect for adverse reactions
Manage if anything &give instruction regarding
next coming
Windup procedure
64. Accurate record of all parameters of
treatment including area treated , technique,
dosage and the outcomes
65. Low J. and Reed A. (1992) Electrotherapy Explained: Principles and Practice.
Oxford
Watson T. (2000) The role of electrotherapy in contemporary physiotherapy
practice. Manual Therapy Aug:5(3);132-41