That Inspire device is intriguing. An implantable tongue stimulator? I'd hate to see what a patient would look like if that battery goes into fibrillation mode
Not sure about overall applicability as median BMI 28 in that study (healthy is under 26). A lot of sleep apnea sufferers are unfortunately more gravitationally gifted than that.
I could also imagine that getting electrical shocks throughout the night can't be that comfortable. AHI reduction doesn't necessarily translate to restful slumber. If you can't sleep, you don't get sleep apnea.
There used to be an implantable diaphragm stimulator for the much rarer cases of central sleep apnea.
For you river rats out there interested in geeking out on water-related Greek mythology, look up Ondine's Curse.