Gravitational effects on carotid and jugular characteristics in graded head-up and head-down tilt
Richard S. Whittle, Ana Diaz‐Artiles
Abstract
Flow stasis and thrombosis have been identified in the jugular vein during spaceflight. We measured the area and pressure of the internal jugular vein and the area of the common carotid artery in graded head-up and head-down tilt. Experimental data are used to generate gravitational dose-response curves for the measured variables, demonstrating that jugular vein area and pressure exhibit a nonlinear response to altered gravity. Gravitational dose-response curves show good agreement with spaceflight and parabolic flight studies.
Topics & Concepts
Head (geology)Head-Down TiltHead tiltAnatomyTilt (camera)MedicinePhysicsBiologyInternal medicineGeometryMathematicsBlood pressureOphthalmologyPaleontologySpaceflight effects on biologyCardiovascular Health and Disease PreventionOptical Imaging and Spectroscopy Techniques