Monitoring Body Fluid Distribution In Microgravity Using Impedance Imaging (APT)

Fluid shifts induced by changing gravitational forces on the body have been observed using the new non-Invasive Imaging technique of applied potential tomography, or APT. Measurements performed during parabolic flight clearly demonstrated the feasibility of using APT to monitor fluld redistribution in spaceflight. A battery powered, body worn APT system has now been developed for use in space. The equipment was tested during the 11th ESA parabolic flight campaign. The data collected with the miniaturised system was comparable to that obtained in the earlier experiment. Ergonomic tests indicated that the equipment is no more difficult to operate and maintain under weightless conditions than on earth.