[caveat emptor]

CPAP therapy is widely used by people with sleep apnea (a-pnea -> no air -> hypoxia), and there’s plenty of research available on different approaches to therapy which might offer help with this particular cause of hypoxia.

[USNBandit]

It isn't that type of hypoxia. We are dealing with histotoxic hypoxia. Instead of producing 100% oxygen the OBOGS system is malfunctioning and providing some combination of gasses that are toxic.

Depending on the aircraft a lot of these fighters already have free flow and emergency forced flow .