Hello Everyone: I'm new to your group although I've been reading various sections for a few weeks now. I was diagnosed with COPD in 2014 and have been doing quite well until lately. My pulmonologist has changed my meds and they are really helping. Previously I only used oxygen at night to sleep but I'm now using it during the daytime, not 100% but when I feel I need it. I bought an OxyGoNext portable concentrator which I bring with me when I leave home. Sometimes I use it and sometimes I don't. I'm due for a dental cleaning in a few weeks and wonder if anyone has any advice about how to use it during my dental cleaning. It's a pulse dose POC which means it doesn't work well and sends alarms if you breathe through your mouth. Thanks in advance for any advice.