[Low-intensity laser radiation applied in occupational pathology].

The authors present results of treatment including laser radiation in patients with various occupational diseases. Evidence is that low-intensity laser radiation appears effective in occupational pathology. The treatment is based on blood circulation improvement.

[Effects in eyes, caused by laser rays emitted by laser-beam projectors].

Health assessment of laser radiation emitted by laser-beam projectors used for laser shows in concert and theatrical events was carried out. The effects of various laser radiation wavelengths and regimes on functional state of eye retina were studied.

[Results concerning hygienic and therapeutic aspects of laser rays over recent decades].

Long-term studies in hygienic, prevention and treatment aspects of laser radiation are summarized. Findings in the given field resulted in over 20 patents and in more than 200 articles, which evidences research novelty.

[Grounds for the procedure of laser projector safety assessment].

Grounds for the procedure of laser projector safety assessment are given. The method allows to measure maximum intensity of diffused and diffusely reflected radiation of laser projectors, irrespective of graphic effects being used. It also makes it possible to standardize the procedure of laser safety assessment, laser devices being used to produce a show.

[Low-intensity laser radiation in preventive measures].

Results of preventive measures introduction in 524 PC users, 98 jewelry polishers and 64 metallic ship hull assemblers are given. The use of preventive measures, based on low-intensity laser radiation, was shown to prevent development of visual overfatigue and occupational musculoskeletal system diseases.

[Preventive measures with low-intensity laser for workers exposed to physical exertion].

Studies covered 168 personal computer users, 98 jewelry female polishers, 64 assemblers of metallic ship frameworks. Various doses of laser rays in accordance with work conditions appeared effective for improving upper limbs microcirculation. The suggested method is based on effects of low-intensity laser irradiation.

[Prevention of occupational diseases of lower limbs joints].

Study covered 84 personal computer users, 48 jewelry female polishers, 92 metallic ships body assemblers. Objective investigations revealed lower limbs joints stiffness. After prevention measures based on low-intensity laser rays, the joints functions recovered.

[Prospects of using laser energy for occupational diseases prevention].

The authors necessitate improvement of "Sanitary regulations and rules for lasers design and use" register No. 5804-91. Laser energy could be used as a prophylactic measure in occupational pathology.

[Relief of visual fatigue in visual strain-related work].

Work associated with visual strain results in visual fatigue. Laser radiation in red part of spectrum relieves visual fatigue, activating reduction-oxidation thiol disulfide system in eyes.

[Setting standards for laser radiation].

The article presents principles of a universal theory of hygienic regulation, proves a principle of regulation warranty. Maximal allowable level of laser irradiation (wavelength 0.63 and 10.

[The role of antioxidant mechanisms in body's reactions to the effects of low-intensity laser irradiation].

Some mechanisms of general and local effects of laser radiation with various wavelength were considered. Both stimulating and stress effects of low-intensive laser radiation realized via antioxidant and free-radical pathways were shown. It was found that the level of SH and SS-groups in tissues and blood is the most sensitive index of laser effect.

[The clinico-hygienic and experimental validation of the nosology of laser-induced disease].

Analysis of literature and the authors' own data suggest that laser-induced occupational disease may be diagnosed in following disorders on the part of: vision--deterioration of light and colour perception, pain and feeling of burning in the eyes; central nervous system--vegetative dysfunction, hypo- or hypertonic neuro-asthenic syndrome manifesting in weakness and fatiguability; cardiovascular system--cardialgias, hypo- or hypertonic neurocirculatory dystonia, hypertonic disease, general weakness, headache; blood--reticulocytosis; enzymes--increase of base phosphatase activity in blood. The whole complex of aforementioned disorders is quite rate (1.5-2% of cases).

[Maximum permissible level of disseminated laser radiation with the wave length of 0.44 mkm].

There where investigated the local and general reactions of 48 male rabbits (chinchilla) exposed to diffused laser radiation with wavelength of 0.44 microns. In the experiments 120 days period of exposure followed by 30 days period of rest.

[Morphofunctional analysis of structural elements of the cornea after exposure to CO2 laser].

In the dynamics of a chronic experiment and after it, the state of the cornea and blood circulation in the uveal tract were investigated, along with the morphological studies of the occipital areas of the brain (area 17) and calculations of the thermal processes in the cornea tissues. Results of the complex studies confirmed that opacification of the cornea was not induced by the damaging heat effect of the CO2-laser irradiation with the energy of illumination at 4.2 x 10(-2) Wt.

[Functional state of blood vessels of the skin--a criterion after exposure to laser irradiation].

The status of the microcirculatory skin channel under laser irradiation with wave length 10.6 mkm of different energetic exposures has been studied. Higher density of vessels per unit of area, longer diameter of the vessels, disturbances in the blood flow have been observed in the dynamics of exposure, which can be used as a criterion of harmful skin effect of irradiation.

[Permissible level of laser radiation of wavelength 10.6 microns].

In a four-month experiment with 102 male rabbits and 42 HRS/U mice and 30 days after termination thereof, study was made of local and general response of an organism to the effect of laser radiation (10.6 microns wave length and energy exposition 1/7 of the threshold). The radiation tolerance level was estimated.

[The stimulating effect of helium-neon laser radiation on rabbit eyes].

Local and general reactions have been studied after subjecting a rabbit eye to dispersed helium-neon laser radiation, 8 x 10(-6) wt/cm-2, 10 min daily for 10 days. There were recorded increase of blood filling of the uveal tract of the eye, changes in the indices of systemic hemodynamics, systolic and diastolic pressure, stroke and minute volume of blood volume, activation of separate links of antioxidant system connected both with oxidation-reduction of thiol disulfide system and the functioning of antiperoxide enzymes. The activation of antioxidant system has a local character, the changes in the retina of the eye and pigmented epithelium is expressed stronger than in the peripheral blood.

[Sensitivity of animals to CO2 laser radiation].

The study was undertaken to analyze the state of visual, cardiovascular and antioxidant systems along with peripheral blood exposed to laser emission with the wavelength of 10.6 mm and energetic exposure equal to that of threshold (21 J.cm2) and subthreshold (1/7 of the threshold value).

[Standardization of laser radiation in the far infrared range].

In experiments with male rabbits the biomicroscopic method was used to study cornea affected by diffuse-reflected radiation with 10.6 microns wave length of different energy exposure. A permissible radiation limit was determined.