Low Oxygen and Depression/Confusion
Three years ago my 61 year old husband was diagnosed with COPD. He was put on Advair and Spiriva and then this past December they had him sleep for two nights with an oxygen sensor to determine his sleeping oxygen levels. They determined that his levels were dangerously low and he now has an oxygen concentrator that he is supposed to sleep with, in addition to any time of the day he feels he needs it.
Some nights he will take the oxygen tubing off in his sleep without realizing it. On these days when I wake up and see he doesn't have it on, I notice that he sounds like someone who is drowning and I have a hard time waking him up. When he does finally wake up he talks gibberish and seems confused, sometimes for an hour or more.
What I am wondering is, can lack of adequate oxygen cause brain disfunction and can it cause irreversible damage?