Redout
Redout
Redout (pronounced: /ˈriːdaʊt/) is a medical term that refers to a condition experienced by pilots and astronauts when they undergo extreme negative g-forces. This condition is characterized by a reddening of vision due to the excessive flow of blood towards the head.
Etymology
The term "redout" is derived from the English words "red" and "out". The "red" refers to the reddening of vision experienced during the condition, while "out" signifies the outward flow of blood towards the head.
Symptoms
The primary symptom of redout is a reddening of vision. This is caused by the excessive flow of blood towards the head, which can lead to the bursting of blood vessels in the eyes. Other symptoms may include headaches, dizziness, and in severe cases, loss of consciousness.
Causes
Redout is caused by extreme negative g-forces, which can occur during high-speed maneuvers in aircraft or spacecraft. These forces push the blood towards the head, leading to the symptoms of redout.
Related Terms
- G-force: The force exerted by gravity or by acceleration of a body.
- Blackout (medicine): A temporary loss of consciousness, vision, or memory, often caused by a lack of oxygen or blood flow to the brain.
- Gravity-induced loss of consciousness (G-LOC): A condition that occurs when g-forces cause a decrease in blood flow to the brain, leading to a temporary loss of consciousness.
See Also
External links
- Medical encyclopedia article on Redout
- Wikipedia's article - Redout
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