A. A laser is a device that emits a special form of light. Laser
light consists of light waves of a single wavelength in which all
the waves reinforce one another, called COHERENCE. If you imagine
heavy surf with large waves breaking on a beach instead of many small
waves, you get a sense of COHERENT light. The term LASER is an acronym
for Light Amplification by Stimulated Emission of Radiation. Radiation
in this case refers to the coherent light energy released, which
produces the laser beam. In contrast, normal daylight is incoherent
light. It consists of all of the colors of the rainbow, with wavelengths
from 400 nanometers (nm), where the light is a blue color, to the
rich, red wavelengths of 750 nm. Our Respond Laser Therapy System
generates light at a wavelength of 904 nm; in the infrared spectrum,
where laser light is invisible to the naked eye.
A. Low level Laser Therapy (LLLT) means the
use of low powered laser light, in the range of 1-1000mW, to stimulate
a biological process.
Just as plants exposed to normal sunlight synthesize carbohydrates
in the process of photosynthesis, laser light stimulates the formation
and release of the body’s own chemical compounds. In LLLT,
the infrared laser energy has a stimulating effect on tissues because
it increases cellular energy. The laser light energy becomes absorbed
by the tissues, stimulating their metabolic processes.
A. Treatment is simple and painless. It is similar to holding a
flashlight close to the skin and shining the light on it. There is
no sensation of pain, nor is there an increase in temperature from
the laser. Treatment times vary based upon the size of the area to
be treated, and the output power of the laser. Most treatments take
5-10 minutes, although the treatment of acupuncture points takes
only 1-2 minutes per point.
|Using the Respond 2400XL laser is simple, just ask Tom Meyers!
Just place the ultra-wide head on the stifle, hold in one place
for approximately 30 seconds, and then move to the next spot.
||Here the ultra-wide head to treat a knee is just as easy. You
treat the front, sides and back of the knee, spending about 5
A. In all the years that low level lasers
have been tested in research and clinical applications, no adverse
side effects or negative impacts
have been reported. This is why the U.S. Food and Drug Administration
(FDA) classifies lasers like the Respond Laser Therapy Systems as “Non-Significant
Risk” devices, requiring a minimum of safety precautions. The
only precaution is that which discourages direct viewing of the laser
beam. Care should be exercised not to stare into the laser beam or
to point it at the eyes, and the use of safety glasses is recommended.
A. Low level lasers have been used by doctors
in hospitals and clinics in Europe on both humans and animals since
the early 1970’s.
In fact, the first studies reporting positive effects of laser on
wound healing in rats were reported by the Hungarian researcher Andre
Mester as early as 1968. In the United States, therapeutic lasers
have been used by veterinarians since the late 1970’s. Just
recently the U.S. FDA has given marketing approval to laser therapy
devices for human use, beginning the trend to widespread use of LLLT
in the United States.
A. A huge amount of research data has been collected on the effects
of laser therapy (over 2000 double-blind studies) both in laboratory
and clinical settings. The following excerpts demonstrate some of
the most significant results: (Check the bibliography if you would
like to do some in-depth reading.)
- Wound healing is significantly improved by low
level laser therapy, even non-healing wounds, thought to be due
to the increased level
of collagen brought about by laser treatment. Collagen, the chief
constituent of connective tissue, is recognized as the most important
ingredient in wound healing. See Dr. Andre F. Mester and Dr.
Adam Mester, LLLT and Wound Healing, John Wiley and Sons, Ltd.,
- Increases in blood flow by means of capillary
and arterial widening of the lumen of blood vessels, vasodilatation.
See Dr. Toshiaki Kami,
Effects of Low Power Diode Lasers, Annals of Plastic Surgery,
Vol. 14, No. 3, March 1985. (Dr. Kami’s work also showed
that the laser light significantly increased the formation
of new capillary
paths in treated areas, which resulted in increased circulation.)
improvement in re-establishment of the lymphatic system after
trauma, resulting in reduction of swelling. This is due to
the evacuation of dirty proteins by the regenerated lymphatic vessels.
(See Dr. P.C. Lieven, The Influence of Laser on the Lymphatic
Presented at the American Society for Laser Medicine and Surgery,
Eight Annual Meeting, Dallas, Texas 4/25-4/28, 1988)
light stimulates release of the body’s own killing
chemicals such as endorphins and enkephalins
Facilitating natural, long lasting pain relief. Dr. Wolfgang
Director of Pain Control Center at Parkwood Hospital, Massachusetts,
USA has provided the best explanation of these pain reduction
“The laser light stimulates the release of the body’s
own pain killing chemicals such as endorphins and enkephalins
from the brain, adrenal glands,
and other areas, thus facilitating long lasting pain relief.”
Low level laser therapy is an effective therapy, working in harmony
with the body’s own healing and relieving mechanisms. There
are no harmful side effects reported from laser therapy.
Laser light causes five (5) actions on tissue, which have been documented
as the basis for treatment benefits. They are listed below, summarized
from medical and veterinary research articles. The articles can be
purchased from http://www.ncbi.nih.gov/entrez/query.fcgi.
The most common example of the conversion of light energy into chemical
energy is photosynthesis, where plants manufacture food from carbon
dioxide and water. Light energy from the sun is the essential item
in that process. No reasonable person disputes photosynthesis, it
is a well-known process that converts photons of light energy into
The action of laser light on tissue is quite similar to photosynthesis
in plants. Photons of light from a laser penetrate deep into tissue
and power the synthesis of adenosine triphosphate (ATP). ATP is a
molecule that is a major carrier of energy from one reaction site
to another, in all living cells. Increases in ATP, as a result of
laser light, increases the energy available to cells so that the
cell can take in nutrients faster and expel waste products. In straightforward
terms, the cells of tendons, ligaments and muscles are repaired faster
when exposed to laser light. How much faster? A good rule of thumb
is that healing time is reduced by one-half to two-thirds the time
it would normally take, all other factors remaining equal.
is the most common protein found in the body. It is estimated that
80% of an animal’s body is made up of this important,
fibrous protein. Various types of tissue make up the body. Connective
tissue is the most widely distributed, where fibroblast cells produce
the tissue fiber. The “extra” energy produced by the
laser light is used by fibroblasts to increase collagen production.
Collagen is the essential protein required to replace old tissue
or to repair tissue injuries. Perhaps the most common example of
collagen is the clear, sticky substance found around open wounds.
Wounds are healed, or closed over, very rapidly by the application
of laser light. There is also less scar tissue formed when laser
light is applied to the are, since the rate of healing is improved.
Laser light has a highly beneficial effect on nerve cells which
blocks pain transmitted by these cells to the brain. Studies have
shown that laser light increases the activity of the ATP-dependent
NaK pump. In this case, laser light increases the potential difference
across the cell membrane moving the resting potential further from
the firing threshold, thus, decreasing nerve ending sensitivity.
A less understood pain blocking mechanism involves the product of
high levels of painkilling chemicals such as endorphins and enkephalins
from the brain, adrenal gland and other areas, as a result of stimulation
by laser light.
wants to reduce swelling in a horse’s leg. The problem
is that the veins in the leg are capable of removing only one component
of the fluid in the swelling. Blood vessels can remove the water,
but not the dirty proteins that are present. If you have a treatment
modality that accelerates the blood flow, you have not solved the
problem. The lymphatic system is needed to carry away the dirty proteins
found in edema. Laser studies conducted in 1987 and 1988 indicate
that laser light is capable of doubling the size of lymphatic ducts
in the area and rapidly removing protein waste. Another important
aspect of the study showed that laser light was capable of “perfect” regeneration
of the lymphatic system in the immediate area, no leakage, no confused
networks of ducts. In the normal regeneration of lymphatic systems,
the ducts are leaky and the duct network is complex and confused,
leading to a tendency to have the same problem occur again in the
Many types of therapy will increase blood flow, and laser light
does this extremely well. What is not recognized, however, is that
the laser will actually increase the formation of new capillaries
in damaged tissue. This formation is responsible for speeding up
the healing process, closing wounds quickly and reducing scar tissue.