The mask is a tiny, round cup, and it may not be obvious in the moment exactly how to wear it. But the oxygen mask works best if you can get it over your mouth and nose, and tighten it so there’s as ...

A non-rebreather mask is a special medical device that helps provide you with oxygen in emergencies. These masks help people who can still breathe on their own but need a lot of extra oxygen.

Non-rebreather masks are used to deliver oxygen therapy to people who require high-concentration oxygen but aren’t in need of breathing assistance. They’re considered low-flow oxygen delivery systems.

To prevent further eruptions, I am getting a CPAP machine, which will, I hope, discourage Sue from solving the problem ...