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Wh is low level laser therapy?


Wh is low level laser therapy?

low level laser therapy

In 1903, Dr. Nils Finsen was awarded a Nobel Prize for his contribution to the treatment of diseases, especially lupus vulgaris, with concentrated light radiation . In 1960, Professor Maiman TH built the first working red ruby laser , but it was not until 1967 when Mester E et al. was able to demonstrate the phenomenon of “laser bio stimulation” . In 1999, Whelan H et al. presented his work on the medical applications of light emitting diodes (LED) for use on the NASA space station . Subsequently over 400 Phase III randomized, double-blind, placebo-controlled trials have been published, with over 4000 laboratory studies of LLLT. (Pubmed.gov)

A laser is a device that generates light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. There are four main classes of lasers as defined by the International Engineering Consortium (IEC standard 60825.) These classes indicate potential danger the radiation is to the eye.

Class 1/1M – CD player
Class 2/2M – laser pointer
Class 3R/3B – LLLT and CD and DVD writers
Class 4 – Surgical laser

LLLT is the application of light (usually a low powered laser or LED typically power range of (10mW–500mW). Light with a wavelength in the red to near infrared region of the spectrum (660nm–905nm), is generally employed because these wavelengths have the ability to penetrate skin, and soft/hard tissues (Figure 2) and are proven in clinical trials to have a good effect on pain, inflammation and tissue repair. The power density (irradiance) is usually between 5W/cm2 and is applied to an injury or to a painful site for 30–60 seconds a few times a week for several weeks. The result is a reduction of inflammation, pain relief and accelerated tissue regeneration. In most cases the lasers/LEDs used for LLLT emit a divergent beam (not focused or collimated) because collimation is lost in tissue, but as a consequence ocular risks are also diminished over distance.

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Low Level Laser Therapy is a form of phototherapy or light therapy. This involves the application of low power light (red and near infrared light) to injuries or wounds to improve soft tissue healing and relieve both acute and chronic pain. It is also known as cold laser, soft laser or low intensity laser. Low level laser therapy aims to bio-stimulate. Because of the low power nature of low level laser therapy the effects are biochemical and not thermal and cannot cause heating and thereby damage to living tissue. The therapy is precise and accurate; and offers safe and effective treatment for a wide variety of conditions including:

Arthritis
Acupuncture Points Stimulation
Back Pain
Enhances Lymphatic Drainage
Releases Tight Muscles
Soft tissue injuries, including sprains and strains and tendonitis
Carpal Tunnel Syndrome
Chronic Pain
Nerve Regeneration
Neuropathy Musculoskeletal Pain
Myofascial Pain
Tendonitis
Sports Injuries
Wound Healing (Speeds Healing)
Pain relief as a result of increased endorphin release
Strengthening the immune system

low level laser therapy

How low level laser therapy work?

mitochondriaLow Level Laser Therapy (LLLT) has a photochemical effect (like photosynthesis in plants). One of the main mechanisms of action occurs in the mitochondria (the cellular power plant inside every cell). The effect depend on the application of the correct wavelength and density of light, delivered to the target tissues for an appropriate period of time (typically between 30 – 60 seconds). Pulses can improve tissue repair and anti-inflammatory effect, analgesia is best achieved with a continuous beam.

TISSUE REPAIR AND ANTI-INFLAMMATORY EFFECTS

The primary effect occurs when light is absorbed in cytochrome c oxidase a protein within the mitochondria.

When cells get stressed (perhaps due to disease, injury or ageing) the mitochondria produces nitric oxide (NO). This competitively displaces oxygen from cytochrome c oxidase consequently reducing ATP (an essential intracellular cellular energy and extracellular signalling molecule) and causing an over production reactive oxygen species (ROS) and leading to oxidative stress. Oxidative stress is well known to lead to inflammation an cell death via the gene transcription factor NF-Kb.

Low Level Laser Therapy (LLLT) of the correct wavelength and density, dissociates NO allowing oxygen back in, so ATP is restored and oxidative stress reduced. Once normal mitochondrial function is restored by LLLT then cell metabolism is improves, and the patient gets better more quickly.

Where need it?

Since the first experiments in the 1960s with laser treatment for impaired wound healing, there has been much research-both lab-based and clinically-into the use of lasers for medical treatment. Later Nils Finsen pioneered the use of UV therapy for which he won the Nobel prize in 1904 [2]). The use of lasers and LEDs as light sources was the next step in the technological development of light therapy, which is now applied to many thousands of people worldwide each day.

The Lasers and LEDs are applied directly to the respective areas (e.g., wounds, sites of injuries) or to various points on the body (acupuncture points, muscle-trigger points). Controlled clinical trials have shown efficacy in treating stroke, stimulating wound healing, orthopedic conditions and relief of chronic inflammation. Preclinical studies have shown effectiveness in spinal cord injuries, peripheral nerve regeneration, heart attacks, degenerative brain diseases and traumatic brain injury.

Laser Therapy is now widely used in:

• Sports-medicine and rehabilitation clinics – to reduce swelling and hematoma, relieve pain, improve mobility, and treat acute soft-tissue injuries
• Dentistry – to treat inflamed oral tissues and to heal diverse ulcerations
• Dermatology – to treat edema, non-healing ulcers, burns, and dermatitis
• Rheumatology – to relieve pain and treat chronic inflammations and autoimmune diseases
• Veterinary Medicine – especially in racehorse-training


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