[Space flight and modeling experiments: new approaches to evaluation and prophylaxis].

Area of Science:

• Physiology
• Space Medicine

Context:

• Orthostatic intolerance (OT) is a significant challenge during spaceflight and simulated microgravity.
• Maintaining cardiovascular stability upon return to gravity is critical for astronaut health.

Purpose:

• To evaluate new impedance methods for assessing orthostatic tolerance.
• To investigate pharmacological interventions for mitigating orthostatic intolerance.

Summary:

• Orthostatic tolerance depends on adequate hydration and hormonal regulation.
• Desmopressin and water-salt supplements were shown to retain body fluid and electrolytes during bed rest.
• These interventions improved tolerance to orthostatic tests in modeling experiments.

Impact:

• Physiologically guided use of synthetic antidiuretic hormone (ADH) analogs can optimize hydration status and orthostatic tolerance.
• This research informs strategies for astronaut health and performance in microgravity environments.