Fig. 3.

Equilibration of capillary fluid with an external bath. Capillary permeabilities are as for OMDVR. Entering luminal ${\text{HCO}}_3^{-}$ is 10 mM, while bath is at 24 mM, with Po₂ of 40 mmHg in both lumen and bath; lumen total phosphate is 2.6 mM. Lumen perfusion rate is 1.0 nl/s. Panes on the left and right show ${\text{HCO}}_3^{-}$ concentration, titratable acid (TA), and net acid (NA) for hematocrits of 45% and 25%, respectively. The NA calculation includes all hemoglobin buffers.