I was tested at UPMC and I was told I had mild sleep apnea. I was given a BiPAP S/T . My IPAP is set at 15 , EPAP at 11.0 and BPM at 10. My oxygen is still dropping to low 80 and sometime 70s. When I’ve been telling my doctor this for 4 weeks and still no changes. I can’t use the machine because of this. When I don’t use the machine I seem to be ok for the most part. I tracked my oxygen levels and they will drop to 87 but go right back up. I also bought a brook stone 4-1 wedge pillow which seemed to really help at night. What am I don’t wrong that my oxygen keeps dropping. I’ve use a full mask, one use the new one that just came out where it rest above your nose.