Buy a oximeter with a alarm built in. Your oxygen could be dropping while you sleep. But your cpap might be reporting that your doing great. I just wouldn't put all my trust into ONE machine. Give yourself random tests. I don't mean every night. Just don't put your oxygen trust on only one machine.

My sleep study titration did not use a chin strap. I have a large square head so my chin strap works great. My minimum pressure i set at 15. Ahi is 7. Sleep study titration was set to 12.5 And I was getting ahi of between 3 to 5 without a chin strap. So using a strap should make me put my pressure a...