RESUMO
The changes of erythrocytic membrane band 3 protein and intraery-throcytic and extrar rythrccytic gases and electrolytes were studied in 69 cases of cor pulmonale and 50 normal subjects.It was found that in the patients of cor pulmonale accompanied with type Ⅱ respiratory failure,the relative low level of erythrocytic membrane band 3 protein and the restriction of HCO-3/Cl-exchange were the factors to aggravate CO2 retention and respiratory acidosis,relative intraerythrocytic alkalosis resulted from the relative increase of intra-erythrocytic HCO-3([HCO-3]),and prompt adminstration of oxygen to cor pulmonale patients with hypoxemia could not only improve extraerythrocytic acid-base imbalance but also increase intraerythcocytic P5O2 and the tissue capacity to store oxygen.