Fig. 4

Evolution of pH (measured by arterial gasometry) and electric potential (mV) (measured by pH electrochemical sensors) in ex vivo (a) and in vivo (b) models during the ventilatory hypoxia induction protocol. Data are expressed as mean ± SEM. N = 9 animals, 3 electrochemical sensors tested ex vivo and 7 electrochemical sensors tested in vivo