95% significance bands for plasma pH and H+ and HCO3– concentrations in chronic hypercapnia. Because of the compensatory rise in the plasma HCO3– concentration, there is much less change in H+ concentration and pH than in acute hypercapnia.
Schwartz WB, Brackett NC Jr, Cohen JJ. J Clin Invest 1965; 44:291. By copyright permission of the American Society for Clinical Investigation.
