I'm late comming into the discussion, but FYI, my pulmonologist ordered a "sniff test" when he suspected a paralysed diaphram last June. Have you had this done? Its a XR Fluoro proceedure with contrast where they watch the diaphram as you "sniff"...
mine proved...
I am having similar issues with congestion since going on the Resmed CPAP machine summer of 2018..I attribute it to an alergy to the silicoln mask materials, but not sure. It seems that when I replace the mask I immediately get the congestion for a week or so...hardly able to talk.
I have used the SoClean 2 since I first went on the machine last summer.
When I confronted the pulmonologist with the issue, he sent me to an ENT doc, who in turn prescribed an antibiotic whcih I took for 2 weeks and added Zantac to my tray of tablets...seems like a guessing game to me!! The problem subsided for awhile, but is still troubling.
Interestingly, the Pulmonologist told me to turn up the machine's humidity setting...a week later, the sleep clinic nurse called as a followup and she told me to turn off the humidity!!!???? When I turned it off the congestion subsided some, but still there today.
Biggest concern is my wife is a lung cancer patient and she went through a similar run around with pulmonologists, gastro docs etc., before we finally went to Mayo and found the underlying problem was LUNG CANCER!