Redout

Not to be confused with Redoubt.
For the video game, see Redout (video game).

A redout occurs when the body experiences a negative g-force sufficient to cause a blood flow from the lower parts of the body to the head. It is the inverse effect of a greyout, where blood flows away from the head to the lower parts of the body. Usually, a redout will only ever be experienced by aircraft pilots, as planes are the most common devices that allow such negative g-forces to be exerted. Redouts are potentially dangerous and can cause retinal damage and hemorrhagic stroke.[1]

According to the predominant theory, the redness appearing in the visual field is not caused by an actual blood flow to the eye, but it is most likely caused by the blood-laden lower eyelid coming into the visual field because of the pull of negative-Gs.[2]

See also

  • Greyout – Visual dimming caused by hypoxia
  • Fainting – Transient loss of consciousness and postural tone
  • Presyncope – Stage before syncope (fainting)

References

  1. ^ Szurovy, Geza; Goulian, Mike (1994). Basic Aerobatics. McGraw-Hill Professional. pp. 33–34. ISBN 978-0-07-062926-4.
  2. ^ DeHart, Roy L.; Davis, Jeffrey R., eds. (2002). Fundamentals of Aerospace Medicine (3rd ed.). Lippincott Williams & Wilkins. ISBN 9780781728980.


Stub icon

This medical symptom article is a stub. You can help Wikipedia by adding missing information.

Content Disclaimer

Informasi ini disarikan dari Wikipedia dan disajikan kembali untuk tujuan edukasi. Konten tersedia di bawah lisensi CC BY-SA 3.0. Kami tidak bertanggung jawab atas ketidakakuratan data yang bersumber dari kontribusi publik tersebut.

  1. The information displayed on this website is sourced in part or in whole from Wikipedia and has been adapted for the purpose of restating it. We strive to provide accurate and relevant information, however:
  2. There is no guarantee of absolute accuracy. Wikipedia is an open, collaborative project that can be edited by anyone, so information is subject to change.
  3. It is not intended to constitute professional advice. The content displayed is for informational and educational purposes only. For important decisions (e.g., medical, legal, or financial), please consult a professional.
  4. Content copyright. Wikipedia is licensed under the Creative Commons Attribution-ShareAlike License (CC BY-SA). This means that content may be reused with appropriate attribution and shared under a similar license.
  5. Responsible use. Any risk arising from the use of information from this website is entirely the responsibility of the user.