SUPPRESSION OF HUMAN BLOOD CHEMILUMINESCENCE BY DIODE LASER IRRADIATION AT WAVELENGTHS 660, 820, 880 OR 950 nm

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Chemiluminescence (CL) of peripheral blood from the same donor was recorded after irradiation with various individual laser and superluminous diodes (660, 820, 880 and 950 nm, pulse repetition rates 16, 292 and 5000 Hz) during two periods of acute viral respiratory illness and in normal conditions of health. It was found that precise and statistically significant effects of laser radiation on CL (suppression of the CL) depend on wavelength, pulse repetition rate and dose and can be recorded only in the period of acute illness (i.e. at a certain immunological status of the organism) and there are practically no effects of laser radiation when the blood of a healthy donor is irradiated. The optimal irradiation parameters for suppression of free radical processes in human blood were as follows: dose range 10³-10⁴ J/m2, pulse repetition rate 292 and 5000 Hz (16 Hz was ineffective). All wavelengths under study had the effect but λ = 660 nm was found to be most effective (65% of CL was suppressed).