carries the highest energy. In its chemical activity, it significantly exceeds all other parts of the light spectrum. At the same time, ultraviolet rays have the smallest penetration depth into tissues - only up to 1 mm. Therefore, their direct influence is limited to the surface layers of irradiated skin and mucous membranes. The most sensitive to ultraviolet rays (photosensitivity) is the skin of the surface of the body, the least - the skin of the limbs. So, the photosensitivity of the skin of the rear of the hands and feet is 4 times lower than the skin of the abdomen and lumbar region. The skin of the palms and soles is the least sensitive. Sensitivity to ultraviolet rays is increased in children, especially at an early age.
Ultraviolet irradiation increases the activity of protective mechanisms, has a desensitizing effect, normalizes blood coagulation, improves lipid (fat) metabolism. Under the influence of ultraviolet rays, the functions of external respiration improve, the activity of the adrenal cortex increases, the supply of myocardium with oxygen increases, and its contractility increases.
The use of ultraviolet rays for therapeutic purposes with a well-chosen individual dose and precise control gives a high therapeutic effect in many diseases. It consists of anesthetizing, anti-inflammatory, desensitizing, immunostimulating, general strengthening effect. Their use contributes to the epithelization of the wound surface, as well as the regeneration of nerve and bone tissue.
Indications for the use of ultraviolet radiation are acute and chronic diseases of the joints, respiratory organs, female genital organs, skin, peripheral nervous system, wounds (local radiation), as well as compensation for ultraviolet insufficiency in order to increase the body's resistance to various infections, hardening, and prevention of rickets, tuberculous bone damage.
Contraindications - tumors, acute inflammatory processes and chronic inflammatory processes in the acute stage, bleeding, stage III hypertension, circulatory failure stage II-III, active forms of tuberculosis and etc.