Hi , and thanks for your post and question - it's a good one! While I am hopeful others will read of your concern and respond by sharing their own personal experience(s), I have something to contribute as well.
The use of nitrous oxide (as an anesthetic), in the arena of dentistry is fairly common. Generally speaking, it is considered to be safe for the vast majority of patients. However, if you are concerned for its use in your particular case (because of your COPD diagnosis), I would suggest that you take this up with your dentist, the anesthesiologist (if the dentist has one on staff), and also your pulmonologist. Together, the team of doctors (and you!), will be able to determine if this is a safe way to perform your dental work.
I also thought this article, from the NIH, might provide you with some additional insight for your concerns: https://www.ncbi.nlm.nih.gov/books/NBK532922/#:~:text=Compared%20to%20other%20anesthetic%20agents,nitrous%20oxide%20a%20valuable%20adjunct.
What do you think?
Leon (site moderator COPD.net)