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, 84 (9), 986-9

Central Retinal Vein Occlusion Following Hypobaric Chamber Exposure

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Case Reports

Central Retinal Vein Occlusion Following Hypobaric Chamber Exposure

Kyoung Min Lee et al. Aviat Space Environ Med.

Abstract

Background: Mountain climbers who ascend to a high altitude could suffer high altitude retinopathy, which varies from tortuous retinal vessels and hemorrhages to retinal vascular obstruction. As hypobaric chamber training could imitate a fast ascent and could lead to decompression sickness, a simulated flight could also lead to a high altitude retinopathy.

Case report: This paper will present a case of central retinal vein occlusion that occurred after exposure to a hypobaric chamber and Valsalva maneuver. Although the patient was treated with an intravitreal bevacizumab injection, his macular edema was aggravated after a helicopter flight, which involved re-exposure to high altitudes and a Valsalva maneuver.

Discussion: Systemic evaluation including blood coagulation and carotid Doppler studies did not reveal any lesion. Notably, central retinal vein occlusion can occur in young, healthy individuals after hypobaric chamber exposure.

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