I've noticed during naps mostly but also during wakings from sleep, that while even sleeping on my side, and also sleeping with a Klearway oral appliance that my head can also droop forward and so more close my airway. I have a real problem with my chin dropping open doing the same thing and so opted to try the Klearway appliance, which after modifications at least helps in that regard and so somewhat diminishes some apneas or breathing problems. What I've been playing around with so far, is using a soft neck brace to help keep the my head and chin from dropping down to my chest. It works well enough for sleeping on my back, but isn't that great for sleeping on my side as it's a bit too bulkly. It also deforms under some weight, so I'm thinking instead of somehow making a more rigid but still softish brace to go between my chin and my chest but with the sides open and perhaps with velcro straps. I haven't found anything like this so far online, so I'm asking here if anyone has come across an already manufactured type of neck brace as I've described? Chin straps which I've tried sort of work ok for keeping the mouth closed, but not to keep the head tipping toward the chest. My oral appliance is also better than any chin strap I've tried by a huge margin.
I'd think that most of us probably have our heads move around during sleep and if our heads tip forward, on our sides or backs or sitting up, the airway gets restricted and quite easily closed off without too much forward movement. I've also not gone too far back in the archives but so far I haven't come across a thread with this concern. I'll keep looking though as even with PAP therapy and the oral appliance, this is part of my OSA problem and I'd like to figure out a usable and comfortable solution. The bad thing is, that it's just one more thing to wear around my head at night.
I MUST stay off my back to reduce OSA & snoring. I use a small backpack of solid styrofoam to keep me on my side (tennis balls too small), & use DIY customized soft foam pillow to keep my head in a side sleeping position to eliminate most OSA.