- General term for the symptom complex resulting from exposure to decreased or changing barometric pressure, including all physiologic effects resulting from such changes with the exception of hypoxia, and including the effects of rapid decompression. [dys- + G. baros, weight]
* * *dys·ba·rism 'dis-bə-.riz-əm n the complex of symptoms (as the bends, headache, or mental disturbance) that accompanies exposure to excessively low or rapidly changing environmental air pressure
* * *n.any clinical syndrome due to a difference between the atmospheric pressure outside the body and the pressure of air or gas within a body cavity (such as the paranasal sinuses or the middle ear). See compressed air illness.
* * *dys·bar·ism (disґbər-iz-əm) a general term applied to any clinical syndrome caused by difference between the surrounding atmospheric pressure and the total gas pressure in the various tissues, fluids, and cavities of the body, including such conditions as barotitis media, barosinusitis, or expansion of gases in the hollow viscera.
Medical dictionary. 2011.