I'm interested in exploring a completely different type of bed design that would allow apnea sufferers to sleep securely with their head face down. Not just a m

I'm interested in exploring a completely different type of bed design that would allow apnea sufferers to sleep securely with their head face down. Not just a mattress with a head cavity in it, but a design that would be both comfortable yet passively discourage subconsciously turning over in the middle of the night.