The blood coagulation system of rats under the influence of laser radiation in different time parameters

Abstract

The influence of different terms of laser irradiation on vascular-platelet and coagulation units of blood coagulation system is investigated. The rats were irradiated with a laser diode in the red spectrum (650 nm) with a power of 50 mW. Rats were divided into two groups: group I - rats, which were irradiated daily for 2 minutes; group II - rats, which were irradiated daily for 4 minutes. Euthanasia of animals was performed on the 7th and 14th days after the onset of irradiation. For the study of the blood coagulation system of rats used biochemical coagulogram with the analysis of the following indicators - the content of fibrinogen, thrombin and prothrombin time, activated partial thromboplastin time (APTT), platelet count. The content of lymphocytes and erythrocyte sedimentation rate were determined also. In the work used blood plasma with sodium citrate. It has been found that daily four-minute laser irradiation in the abdominal area for two weeks leads to a decrease in the concentration of factor I blood clotting (fibrinogen) and an increase in thrombin time. At the same time, prolongation of prothrombin time and APTT was detected, indicating a deficiency of other factors of blood coagulation - II, V, VII-XII, and the presence of anticoagulant status, which may be associated with inhibition of the internal pathway of clotting. Thrombocytopenia is probably caused by the increased destruction of platelets or their insufficient formation as a result of dysfunction of hematopoietic organs. The two-minute effect of laser irradiation does not affect the clinical and biochemical parameters of the blood coagulation system of rats after a weekly daily action of the laser diode. Two weeks irradiation is accompanied by processes of hypocoagulation, as evidenced by a decrease in fibrinogen levels, platelet counts, and a simultaneous increase in APTT, thrombin and prothrombin time.