I had my first sleep study in my early 30s because I had started snoring horribly. I was diagnosed with mild Sleep Apnea and basically told it wasn't anything to treat at that time even though I was continuously exhausted. My second study was done about 10 years later. By then I had developed hypertension/high blood pressure. I was having 72 episodes an hour of not breathing. My doctor conducted a Septoplasty for a deviated septum, as I was not breathing through my left side, and we tried the CPAP. I could not fall asleep while wearing it. We tried for 3 months different things and I just could not tolerate it (and I'm a stomach sleeper.) I ended up having UPPP. The surgery is another subject, but after I had extremely good results with breathing, less snoring, feeling refreshed for the first time in years upon waking, actually waking! But I am now 4 years post surgery and am noticing I'm back to feeling drained and exhausted. I find very little information on any follow up to see if UPPP works long term for APNEA. I know sleep studies are expensive but how do you determine if UPPP is a success if there is no data? Why is there no follow up study?