[A study of the intercapillary distribution of PO2 in the brain using microelectrodes].

A simple method was suggested which enabled to estimate the intercapillary PO2 under different conditions. The intercapillary distribution of the cortex tissue oxygen pressure in normal conditions and in hypoxia was studied in unanesthetized and immobilized cats with the aid of microelectrodes. The absolute values obtained varied from 1 to 95 mm Hg. Initially high PO2 underwent maximum changes in hypoxia whereas lower PO2 values did not change significantly.