When I changed my cannula I discovered there was no air coming through it -- neither the old one or the new one. I checked my hoses and there was no air coming out of anything, altho the little bit of water in my bottle was bubbling.
After messing around with things, my husband took the water bottle off and blew into the connector a couple of different times and when he did that the last time, we finally got some air coming through.
I still can't figure out what went wrong but I think I may have been without oxygen for a spell because I had been feeling especially bad.
Does anyone know what could have caused this?