Hypergravity and gravity changes encountered in, e.g., airplanes, rollercoasters, and spaceflight can result in headaches or loss of consciousness due to decreased cerebral blood flow. This paper describes the effect of hypergravity and gravity changes on the pressure in the aorta and the distension of its wall. The model presented consists of a pressure part caused by gravity and a part representing pressure waves propagating through the vessel. The total pressure is described by a one-dimensional formulation in the frequency domain. To accommodate for geometrical and material variations, the vessel is modeled as a series of sections in which multiple reflections can occur. Results are presented for constant and varying gravity in straight and tapered flexible vessels.
Hypergravity and Multiple Reflections in Wave Propagation in the Aorta
Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received December 12, 2010; final manuscript received December 12, 2011; published online November 28, 2012. Assoc. Editor: Jong Chull Jo.
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Kroot, J. M. B., and Giannopapa, C. G. (November 28, 2012). "Hypergravity and Multiple Reflections in Wave Propagation in the Aorta." ASME. J. Pressure Vessel Technol. February 2013; 135(1): 011301. https://doi.org/10.1115/1.4007187
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