[CPAP] One year in, puzzled by OSCAR data

[sleepyvet]

Hi everyone,

I am a 41 year old male and have been on CPAP therapy for about a year. I've had a sleep study done while I was in the service about 20 years ago and my AHI at the time was ~22. After the sleep study diagnosis, I had uvulopalatopharyngoplasty, which resolved my OSA for few years before daytime sleepiness returned. At age 40, I had another sleep study done, which indicated I had an AHI of 5.1 Despite the low AHI, CPAP has made a huge difference in my quality of sleep and I've been using CPAP religiously since. 

I am using AirSense 11 with ResMed F40 hybrid mask. My pressure is 8 - 18 cm H2O (I was initially prescribed 5 - 15 cm H2O) and EPR at 3. I am using the built-in humidifier and do not mouth tape. I've been reviewing my CPAP data using OSCAR and I am puzzled by last night's sleep data. My AHI was unusually high and event flags are all over the place. Can someone take a look and help me understand what's happening?

           

[SarcasticDave94]

Welcome to the Apnea Board,

If you'll look at the clustered event look on OSCAR that you've added, it's possible they're affected by Positional Apnea. This can be a chin tuck type of restriction that can happen, especially if there's thick pillows or several stacked. It can be by other means as well, side sleeping and a poor neck alignment.

If the pillow stack isn't it, look at the wiki about a soft cervical collar to get more info to prevent this.

https://www.apneaboard.com/wiki/index.ph...cal_Collar