Hi Nibbles, and welcome to our online community. I see you joined earlier today - we are glad to have you here! We appreciate your sharing your present situation (flare-up and treatment in the emergency department (ED)), with the community. For some folks with COPD, an unexpected flare-up may require supplemental oxygen therapy while being treated for the exacerbation.
How are you feeling now? Are you using oxygen at home?
Wishing you well,
Leon (site moderator COPD.net)