question about oxygen/muscle weakness

[Guest guest]

I am vaguely remembering a discussion many months ago about oxygen

therapy for people with muscle weakness of the chest. Is there any

controversy among experts about the use of oxygen for elevated Co2

due to muscle weakness? Are there any particular cautions or

contraindications? Seems like I read some posts about differing

opinions on treatment where muscle weakness is the cause of low

oxygen?

Any help appreciated.

Barbara