Jugular venous flow dynamics during acute weightlessness
Karina Marshall‐Goebel, Stuart M. C. Lee, Jason R. Lytle, David S. Martin, Christopher A. Miller, Millennia Young, Steven S. Laurie, Brandon R. Macias
Abstract
The absence of hydrostatic pressure gradients in the vascular system and loss of tissue weight during weightlessness results in altered flow dynamics in the left internal jugular vein in some astronauts that may contribute to an increased risk of thromboembolism during spaceflight. Here, we report that the internal jugular veins distend bilaterally in healthy participants and that flow stasis can occur in the left internal jugular vein during acute weightlessness produced by parabolic flight.
Topics & Concepts
WeightlessnessMedicineAnatomyPhysicsAstronomyHigh Altitude and HypoxiaThermoregulation and physiological responsesHeart Rate Variability and Autonomic Control