Red Light Therapy
The main light sources of PDT photodynamic therapy are blue light (415nm) and red light (630nm). The blue light spectrum closely matches the absorption peaks of coproporphyrin III and protoporphyrin IX. Using it to irradiate P bacterium will cause the light excitation of the cell's endogenous porphyrin and achieve a bactericidal effect. At the same time, blue light can inhibit the proliferation of P bacterium by inducing membrane permeation to change the intracellular pH. But its skin permeability is poor. Red light is less effective in activating porphyrin, but it can penetrate deeper tissues. Studies have shown that red light can penetrate 6mm tissue, while blue light can only penetrate 1-2mm tissue. It is shown on the skin that the scattering rate of light is high, and the treatment depth of red light can still reach 1-3mm. At this time, blue light can only act on the epidermis. Therefore, red light combined with 5-ALA can be used to treat deeper acne lesions, and can be used for the treatment of BOWN, S disease, epidermal carcinoma in situ, warts, psoriasis, etc.
The Biological Effects of Eed Light:
(1) Promote wound healing
(2) Scavenging free radicals in the body
(3) Decrease blood viscosity
(4) Increased cell energy supply
(5) Increase blood oxygen carrying capacity significantly
(6) Delay skin aging and have cosmetic effects
(7) Regulate immune function
The role of Red Light
Red light irradiation is to filter most of the red light, mainly in the red light band, and its biological function is mainly photochemical. Instead of heat. According to foreign scholars, mitochondria have the greatest absorption in the red light region. After red light is irradiated, the catalase activity of mitochondria can be increased. This can increase cell metabolism, increase glycogen content, increase protein synthesis and increase the decomposition of adenosine triphosphate, so it can promote cell synthesis, can promote the healing of wounds and ulcers, promote hair growth, promote fracture healing, and accelerate damaged nerves Regeneration also increases the phagocytosis of white blood cells, so it can be used clinically to treat many diseases.
Treatment Range
1. Anti-inflammatory, Analgesic
It is effective for some acute, subacute and chronic inflammations. Because it can increase the phagocytosis of white blood cells, it also improves the body's immune function and increases the body's defense function. In addition, in the early and middle stages of inflammation, the content of serotonin in local tissues increases. This serotonin can cause pain in the body. After being irradiated with red light, the content of serotonin can be reduced, thus playing an analgesic effect.
Indications: furuncle, carbuncle, erysipelas, eczema, cervical erosion, vulvar itching, chronic pelvic inflammatory disease, postpartum infection, dysmenorrhea, phlebitis, frostbite, cholecystitis, prostatitis, periarthritis of the shoulder, paronychia, brachial plexus and Peripheral nerve injury, anal itching, chronic cryptitis, anal fissure, cystic hyperplasia of the breast, acute mastitis; costochondritis, cervical spondylosis; pediatric pneumonia, infant diarrhea, rheumatoid arthritis, costal rheumatoid arthritis, bone Arthritis, ulcerative structural inflammation, bronchial asthma, jaw arthritis, laryngitis, nasal vestibulitis and other diseases.
2. Promote Wound and Ulcer Healing
Because the stimulation of red light can increase the number of fibroblasts and increase the formation of glial cells, it can strengthen the regeneration of cells and promote the growth of granulation tissue. For example, X-ray treatment has good curative effect on refractory ulcers, malnutrition ulcers caused by phlebitis, bedsores caused by long-term bed rest, and poor healing of surgical wounds.
3. Promote Hair Growth, Accelerate Callus Healing, and Regenerate Nerve Damage
Red light stimulation can accelerate hair growth, so it can be used to treat alopecia areata, seborrheic alopecia and other diseases. Red light irradiation can promote callus growth and fracture healing. Because red light can stimulate the growth of injured peripheral nerve axons, accelerate the formation of nerve myelination, and accelerate the reinnervation of skeletal muscles, it can treat peripheral nerve injury.
4. Phototherapy
Use red light with photosensitive drugs to treat malignant tumors. It has certain characteristics, such as preventing tumor cells from splashing, and less damage to normal cells. Due to the high price of the laser or the low output power, it affects the development of this photosensitive treatment; and red light can replace this deficiency. . Because its output can reach the watt level, and the price is only 1/3 to 1/5 of the laser price. So it can be used to treat cancer.
48-72 hours after injection of hematoporphyrin derivatives, irradiate the tumor with red light (power density of 200mw/cm2). After 20-30 minutes, the tumor tissue will appear edema and congestion. After 24 hours, the tumor will become black and necrotic, one week Later, black scabs formed. After the black scabs fell off, the tumor tissue disappeared. This method can be used to treat skin cancer; oral cancer, cervical cancer and other cancers.
Features:
The output power is large, the penetration depth is deep (10-15mm), and the spot can be directly enlarged, and its power density can also meet the requirements of treatment. For a large area of diseased parts, it can be included in the spot range at a time, so that Uniform irradiation and shorten treatment time;
2. In addition to the treatment of body surface diseases, intracavitary treatment can also be carried out. Intracavitary treatment can be carried out by irradiating the spot with a light guide system, such as treating chronic pharyngitis, cervicitis, chronic prostatitis and ulcerative colitis;
Laser therapy has not been short for hair loss treatment, and it has achieved better results. It is a physical treatment that uses the thermal and photochemical effects of laser on human skin to treat abnormal hair loss on the head. The principle is to use soft laser light (red light and far red light) to penetrate into the subscalp cells (hair roots and hairs). Milk ball) the deepest layer, to accelerate blood circulation, regulate endocrine and improve hair quality. In addition to inhibiting shedding, it can also make hair grow back. Laser irradiation can increase skin temperature, strengthen local blood circulation, reduce the sensitivity of nerve endings, reduce scalp itching and local pain, and have a better control effect on oil secretion.
