I did not have nasal oxygen. My only initial symptomatic improvement was immediately warmer fingers and feet. It will be four weeks tomorrow, and that has not changed.
At about 2 weeks, I felt my balance being better for 5 days straight. Then I'm afraid that I began overdoing it and it began being less predictable. Now it's in and out. But before liberation, it was always out. So that's still better!
I have not choked in 4 weeks. That's impressive and can in no way be credited to euphoria, or placebo.
Lots of this is a mystery. No two people's MS is the same, nor is their stenosis, so it stands to reason that their recovery would be vastly different, too.
That's why I, and many others are keeping blogs to track our experiences. It helps me see where I'm going, and hopefully will help others watch along with me.