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Reference.org
Isobaric counterdiffusion
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<p>In <a href="/facts/Physiology/fh25y2pQ">physiology</a>, isobaric counterdiffusion (ICD) is the <a href="/facts/Diffusion/KbAxroBa">diffusion</a> of different gases into and out of <a href="/facts/Tissue_(biology)/H7CpML7A">tissues</a> while under a constant <a href="/facts/Ambient_pressure/mfHMbHMR">ambient pressure</a>, after a change of gas composition, and the physiological effects of this phenomenon. The term inert gas counterdiffusion is sometimes used as a synonym, but can also be applied to situations where the ambient pressure changes. It has relevance in mixed gas <a href="/facts/Underwater_diving/yhjLjF1H">diving</a> and <a href="/facts/Anesthesiology/hyfr9hRt">anesthesiology</a>. </p>