The interaction of diffusion and perfusion in homogeneous tissue

Inert Gas Exchange and Bubbles

“…22,23 For concurrent capillary flow with accepted diffusivities and diffusion distances in vascular tissues, calculations indicate that diffusion is rapid and inert gas concentration gradients are minimal. 10,[24][25][26][27][28][29][30] Diffusion might be more important in tissues such as bone, articular cartilage, 31 and the eye, 32 where diffusion distances are on the order of millimeters.…”

Taylor dispersion in finite-length capillaries

“…However, it has been shown that diffusion theory can correlate equally well with those experiment data (Hills, 1970). A theoretical approach that considers both the diffusion and advection of the gas in blood and its exchange to surrounding tissues is, therefore, necessary (Hennessy, 1974;Wang et al, 2003;Wang, 2005). In the present study we use the concept, which has been successfully used in chemical engineering over more than fifty years (Danckwerts, 1953), namely, the residence time distribution (RTD).…”