[The blood indices of the flight and technical engineering personnel in helicopter aviation who were participants in the cleanup of the accident at the Chernobyl Atomic Electric Power Station].

Qualitative analysis did not reveal changes in the blood forming system in pilots subjected to admissible doses of ionizing radiation. Quantitative evaluation of hemogram using the integral coefficient of deterioration of blood indices and differential blood count entropy index allowed to establish correlation between shifts in blood and dose rate. Hematologic changes, particularly in oxidative enzymes of platelets, to a large extent depend on the whole complex of factors characteristic of the Chernobyl accident. After 5 years since that tragedy the number of formed elements of pilots blood did not exceed their specific limits.