[Red blood function in systematic exposure to +Gz g-forces].

In 8 healthy men exposed within a year to systematic +Gz accelerations with cycles of 2-month work on centrifuge followed by a month rest the functional state of the red blood cells was studied repeatedly and once in 26 fighter pilots. The blood was tested for such indices as hemoglobin, reticulocyte and erythrocyte counts; the functional state of erythrocyte pool was tested using a modified method of acidic erythrograms enabling one to record kinetic parameters of hemolysis: maximum rate of hemolysis and time of its development. Intensity of loads in the cycles of centrifuging was estimated from the Barton index. It is indicated that one of the effects of systematic exposure to +Gz accelerations is an accelerated destruction of the cells with reduced resistivity a function of exposure intensity. The destructive processes induced by accelerations trigger for a short time the mechanism of compensatory activation of the red blood system. Analysis of diagrams of percentage distribution of the parameters of the erythrocyte function after centrifuge runs of various intensity, and in the pilots revealed a significant compensatory activation of the red blood system only in 25% of pilots. The criterion validity of the indices tested for the system of individual control of the adaptive processes strain in the body is discussed.