[Influence of hypoxia and hyperoxia on the 2,3-diphosphoglycerate concentration in rat red blood cells].

The influence of hypoxia (pO2 = 85 mmHg) lasting 5 h, a strong single bleeding of the animals, and the effect of hyperoxia (pO2 = 745 and 1520 mmHg) lasting 24 and 5 h, respectively, on the 2.3-DPG concentration of red cells from rat has been studied. A distinct increase in 2.3-DPG concentration at hypoxia and bleedig, but no reliable alteration in hyperoxia were found. When bled and anemic animals are exposed to hyperoxia (24 h, pO2 = 745 mmHg, normal air pressure) there is also observed a rise of 2.3-DPG concentration, which is much less than in normoxia. A non-linear relationship was established between the change of 2.3-DPG concentration and the percentage of deoxyhemoglobin in the centralvenous blood.