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Therapeutic

LASER

Dr. Subhash Khatri

BPhT, MPT, PhD, FIAP
Overview
• Laser is an Acronym for the Light
amplification by the Stimulated
emission of Radiation.
• Therapeutic laser is also known as
Soft laser, Cold laser, Low intensity
laser, class III A B, optic laser
• Laser is a beam of light which is
used for various purposes.
HISTORY






Einstein
1953 Maser
Optical Laser
1955 Dr.Theodre Maiman
1960 Bennet, Javan & Herriott
HISTORY
•
•
•
•
•
•
•

1962 White & Ridgen
1964 Flock & Zueng
Applications in different fields
Communication, Industry
Music, Typing
Military, Medical
Dermatology, dentistry, OBG,
optahalm, diagnosis, Physiotherapy
• Visible
• Not visible
Electrical stimulating

currents

Commercial radio & TV
Short wave diathermy
LASER

{

Microwave diathermy
Infrared rays

Visible light
Uoltraviolet
Ionizing radiation
Infrared
Red
Orange
Yellow
Green
Blue
Violet

Ultraviolet
FAMOUS KIDNAP
PROPERTIES
1. Monochromaticity
2. Coherence
3. Collimation
CLASSIFICATION
1. Hot laser
•
•
•
•

HIL
Surgical Laser
Causes tissue heating
Power > 60mW

2. Cold laser
•
•
•
•

LIL
Therapeutic Laser
No Tissue heating
Power < 60mW
GEM
• Paper correction by Prof.
Sardaji
Types
•
•
•
•
•
•
•

1.Helium Neon Laser : 632.8nm
2.Ruby Laser: 694.3nm
3.Gallium Laser : 750nm
4.Aluminum Laser : 780nm
5.Arsenide : 810nm
6.Diodes Laser :820nm
7.Carbon Dioxide : 10000nm
Types
 Gas lasers
 Helium, neon, argon, carbon
dioxide

 Chemical lasers
 Hydrogen fluoride,

 Solid laser
 Ruby laser

 Diode Laser: like solid but
works on electron
Classification
• Class I/1: Safe, cd players.
• Class II/2: 1 mW: blink reflex of eye will
prevent damage. up to 1 mW power, for
example laser pointers.
• Class IIIa/3R: 5 mW and staring into such a
beam for several seconds is likely to cause
(minor) eye damage.
• Class IIIb/3B: immediate severe eye
damage upon exposure. Usually lasers up
to 500 mW, cd and dvd burners.
• Class IV/4:burn skin, eye and/or skin
damage. industrial and scientific lasers are
in this class.
PRODUCTION
•
•
•
•

1.Principle of production
2.Functional Parts
3.Working
4.Parameters
Functional parts
1.Lasing medium
2.Energy Source
3.Mechanical Structure
PODUCTION

Energy

Lasing Medium

LASER

Mechanical Structure
Working
Parameters
1.Security switch
2.Timer
3.Mode
4.Sensor
5.Fiber optic cable
6.Probe
7.Probe switch
EFFECTS OF LASER
1. Pain relief
2. Tissue healing
PAIN RELIEF
•
•
•
•
•
•

G.C.T.
 Serotonin
Endorphin secretion
Acute & Chronic pain
Pain site, trigger points,
Acupuncture points
GEM
• IF A STUPID FOLLOWS LOGIC
• THEN LOGIC BECOMES STUPID
Tissue healing
• Phagocytosis, Collagen Synthesis,
Contracure
• CUMMING’S EXPERIMENT
• BIOSTIMULATION THEORY (Biochemical,
Physiological,Proliferative → Proliferation
offibroblasts,reepithelisation &
remodelling)
• PHOTOCHEMICAL THEORY
• Chromophores → Biostimulation
BEFORE & AFTER LASER
BEFORE & AFTER LASER
INDICATIONS
1.Incisions
2.Osteoarthritis
3.Rheumatoid arthritis
4.Ankle sprain
5.Chronic Low back pain
INDICATIONS
6.Tennis Elbow
7.Bicipital tendinitis
8.Trigger Finger
9.Chronic ulcers
10.Wounds
11.Tenosynovitis
12.Carpal Tunnel Syndrome
13.Periarthritis
14.Sports injuries
Contraindications
1.
2.
3.
4.
5.
6.

Pregnancy
Neoplasms
Exposure to Eye
Hemorrhagic area
Infected wounds
Thrombosis
DOSAGES
• 2 TO 30 Seconds
• Energy density = Power (W)  Time (sec)
•
Treatment Area ( cm²)

• 3 to 10 weeks
• Acute :Continuous
• Chronic: Pulsed (10- 20pps)
Thanks for Listening !

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Therapeutic LASER

Editor's Notes

  1. EINSTEIN GAVE AN ACCOUNT OF STIMULATED EMISSION OF RADIATION. Laser was also called as optical laserIN 1953 MASER WAS INVETED. 1955 Dr.Theodre Maiman devised a working model for production of Laser from Ruby crystal. In 1960 Bennet, Javan &amp; Herriott discovered He-Ne laser.
  2. In 1962 White &amp; Ridgen produced visible red Laser with wavelength 632.8nm. In 1964 Flock &amp; Zueng for the first time used Laser for surgery. There after the interest in Laser increased and possible applications in different fields were determined
  3. Gordon Gould, he used acronym for the first time in his PhD thesis in 1959
  4. Military application , laser EMW can be in the range of gamma, x ray,uv, visible, infra,micro, radio waves and henc can be called x ray laser, gamma laser etc
  5. This is electromagnetic spectrum, to your left is wavelength and to your right is frequency
  6. Warning symbol for lasers
  7. SARDARJI SUFFERS FROM SERIOUS FINANCIAL CRISES, HE HAD TWO OPTIONS EITHER TO LOOT BANK OR TO KIDNAP. HE OPTS FOR SECOND. HE KIDNAPS ONE CHILD, TAKE THE CHILD TO REMOTE PLACE AND WROTE ON A PAPER A MATTER FOR CHILD FATHER THAT HE SHOULD PAY A RNASOM OF 20 LACKS AT A PLACE MENTIONED BY HIMOTHERWISE HE WILL KILL HIS CHILD, SIGNS IT AS ONE SARDARJI TUCK IT ON BACK OF CHILD AND SENDS HIM TO HIS FATHER.AT SPECIFIED LOCATION THEN HE FINDS CHILD WITH 20 LACKS IN HIS HAND MEANT FOR HIM WITH A NOTE, IN WHICH IT WAS WRITTEN THAT DON’T A FEEL ASHAMED OF YOURSELF WHILE CHEATINNG OTHER SARDAR WITH A SIGN SECOND SARDARJI
  8. Star fire by NASA
  9. One student attaches a 100 rupee note to ans book &amp; write Rs 1 rupee per mark. Prof Sardarji corrects the paper, takes out Rs 100, attaches 80 7 writes you scored 20, keep the change of 80
  10. He Neon machine