I have been using the stabilized oxygen drops in my water and it has been helping. Yeast doesn't like oxygen and yeast can become immune to different herbs, etc. if used to often. So oxygen sounds like a good way to go. I don't think there is a chance that yeast can become immune to oxygen, it can't survive in an oxygen environment.
Hyperbaric therapy can be expensive, but imagine flooding your body with oxygen on a daily basis!!