Assessment of Jugular Venous Blood Flow Stasis and Thrombosis During Spaceflight.

ABSTRACT: Importance:Exposure to a weightless environment during spaceflight results in a chronic headward blood and tissue fluid shift compared with the upright posture on Earth, with unknown consequences to cerebral venous outflow. Objectives:To assess internal jugular vein (IJV) flow and morphology during spaceflight and to investigate if lower body negative pressure is associated with reversing the headward fluid shift experienced during spaceflight. Design, Setting, and Participants:This prospective cohort study included 11 International Space Station crew members participating in long-duration spaceflight missions . Internal jugular vein measurements from before launch and approximately 40 days after landing were acquired in 3 positions: seated, supine, and 15° head-down tilt. In-flight IJV me

SUBMITTER: Marshall-Goebel K 

PROVIDER: S-EPMC6902784 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature