Figure 3. The hypoxia model in vitro was assessed by a blood-gas analyzer. The Po2, Pco2, and pH values of the hypoxia groups were measured with a blood-gas analyzer at each time point. When the cultures had been exposed to hypoxic conditions for more than 2 hours, the Po2 was 4.5 to 5.4 Kpa, the Pco2 was 6.13 to 6.54 Kpa, and the pH was 6.8 to 7.0.
