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[Red blood function in systematic exposure to +Gz g-forces]
Aviakosmicheskaia I Ekologicheskaia Meditsina = Aerospace and Environmental Medicine
|March 1, 1993
Summary
Exposure to Gz accelerations accelerates red blood cell destruction, with only 25% of pilots showing compensatory activation. This study examines red blood cell function under Gz stress.
Area of Science:
- Aerospace Medicine
- Hematology
- Physiology
Background:
- Repeated exposure to Gz accelerations can impact physiological systems.
- Red blood cell (erythrocyte) function is crucial for oxygen transport and can be affected by environmental stressors.
Purpose of the Study:
- To investigate the effects of systematic Gz acceleration exposure on red blood cell functional state.
- To assess the compensatory responses of the red blood system in individuals exposed to Gz forces.
Main Methods:
- Studied 8 healthy men and 26 fighter pilots exposed to Gz accelerations.
- Analyzed hemoglobin, reticulocyte, and erythrocyte counts.
- Utilized modified acidic erythrograms to measure hemolysis kinetics (rate and time).
- Estimated Gz load intensity using the Barton index.
Main Results:
- Systematic Gz acceleration exposure led to accelerated red blood cell destruction, with cell resistivity decreasing proportionally to exposure intensity.
- Destructive processes triggered short-term compensatory activation of the red blood system.
- Only 25% of pilots exhibited significant compensatory activation of the red blood system.
Conclusions:
- Gz acceleration exposure induces red blood cell damage and alters their functional state.
- The red blood system's compensatory response to Gz stress is not uniformly significant across all individuals.
- The tested erythrocyte function indices show potential for monitoring adaptive strain in response to Gz exposure.