Hi!

I'm brand new to using a CPAP machine, this is my first week. I'm excited to finally fix my sleep. I was prescribed a Resmed Airsense 11 Autoset with a pressure of 5-20 (which I found out quickly was a bad/generic prescription). I have since changed it to 8-13.

I've uploaded a picture of last nights data. I seem to have no OAs at all, but a large amount of CAs at 8.22. What could be causing this? Is there anything glaringly wrong about my settings? I turned both ramp and EPR off since I found them to be uncomfortable.

I appreciate any advice I can get!

https://imgur.com/a/0FS23Ew

Could mouth leaks be the culprit?
I’ve included my previous settings.
I feel pretty good today.
I keep waking up as well.

I've had 3 different CPAPs over 15 years. Usually try for a month or two and it never works for me.

I'm trying again and trying to make it work. I had an F20 but am a side sleeper and I would always take off my mask in the night after 90 minutes. I got the F40 and last night was my first night. I wore it for 4:01. A new record!

What does my data say? What do you suggest? I will try again tonight w/ excitement. I do remember having a VERY dry mouth. I read someone suggesting don't use the pillows mask setting for the F40 (when it recommends it) if someone can comment. Any and all help is appreciated.

https://sleephq.com/public/teams/share_links/1ee312cd-cfa1-439d-b69a-cb1f6325f320

Hey All,

I'm reaching out regarding some data I've collected via OSCAR since starting treatment with CPAP. As a fair warning, I'm giving a fair amount of detail in hopes that it may promote a greater understanding of my situation:

Relevant Background

My AHI is Very Mild at 6.3 

• I had a PSG on March 27th and it showed hypopnea-dominant events, with more events in occurring during REM.
• While at face value 6.3 is quite mild, I'm not sure it is totally representative of the overall picture. I've tried to illustrate my rationale below.

Overnight Pulse-oximeter Data Aligns with PSG Data

• I collected data prior to my formal PSG using an overnight pulse-oximeter (per second measurement frequency), and this is ultimately what led me to seeking out a formal PSG.
• While the accuracy of the pulse-ox can be debated, the internal accuracy (meaning the device's variability) is probably trustworthy measurement-to-measurement. The pulse-ox generates a report from overnight data that I use to correlate O2 desaturations with an increase in HR and determine likely O2-related arousals.
• It's worth noting that I used the pulse-ox again a few days after my sleep study and found the data it reported mirrored the PSG O2 desats quite closely . While this doesn't prove anything specifically, it does give me more confidence that the pulse-ox is reliable from an oxygen desaturation standpoint.

 

Weight is a Factor (Empirically)

• By the time I had my PSG, I had lost ten pounds from when I had originally collected my own pulse-ox data. My BMI was hovering around 27 in late February, and was just under 26 going into my sleep study.

 

Night-to-night Variability

• All of this information is to help corroborate the idea that there is significant night-to-night variability to consider as well as the role of weight in the process for my case. 
• To provide some concrete numbers, my pulse-ox data in early March showed ODI 4% ranging from 22-28/hr per night over multiple nights. Following my PSG (and weight loss) the same pulse-ox showed ODI 4% ranging from 2.4-9.7/hr per night over multiple nights.

Data Conclusions and Limitations of ODI

The only conclusion I can draw from the data I have is that the night-to-night variability is driven by another factor other than weight, and this is what has led me to this forum. 

I understand ODI is not a replacement for PSG data, but due to limitations from insurance and as a human who wouldn't want to sleep with the PSG equipment nightly, it's not possible to collect all PSG datapoints each night.

CPAP Data

I am using a ResMed AirSense 11 with ResMed F40 full face mask. My pressure is currently set to 10.0 with EPR 2. To date, I've collected 29 days' worth of data using CPAP, with 21 of those days using the machine for >4 hours. The timeline may seem off and that's becuase I purchased a machine off Craigslist because I wanted to start the process of diagnostic exclusion as quickly as possible since my sleep study was originally scheduled at the end of May and my issues had been ongoing for over 1.5 years. For the sake of simplicity, I'll summarize that my first few weeks were a train wreck where I had myriad issues trying to adjust to the mask and in controlling leaks. 

I ultimately determined that I sleep too sensitively for APAP; although, perhaps now that I'm more adapted it's possible my sensitivity would be reduced. I eventually have determined that I need a full face mask due to mouth-breathing (thanks to a deviated septum and jaw-drop during REM). I eventually discontinued using the CPAP prior to my PSG and decided that I would await my results before continuing.

Since restarting the CPAP about a week ago, I've had a much-improved nightly AHI compared to my initial foray with CPAP a couple months back. 

• However, I still can't seem to dial in my exact settings. I've pored through my OSCAR data and conducted numerous searches in this forum to try and find the solution, but I've had little success.

I tried using a nasal mask, but couldn't control the leaks during REM, so I switched back to my full face mask, ResMed F40. 

• I have had zero issues adapting to the F40 mask in the last five days. I put it on and have been falling asleep right away. My numbers for the five days since have ranged from 2.49-9.56 AHI.

I've tried to increase the pressure in small increments to normalize inspiration patterns (flow rate) and find the sweet spot for CA events, but it seems adjustments up always lead to more CA events and no change on the inspiration patterns.

I tried 11.6 one night to see if I could reel in my inspiratory irregularities that I suspect are occurring during a specific sleeps stage, based on the timing and frequency. That night yielded a 9.56 so I quickly reverted back to 10.4 the next night.

These irregularities occur throughout the night and are not limited to the screenshot example given. 

By and large, most of the night seems to have relatively regular (slightly skewed right) inspiratory waves, but I've noticed that the events I have seem to fall around the inspiratory waves becoming irregular.

Lastly, it's worth noting that when I would wear the CPAP during the day (as I began adjusting to it), my inspiratory waves were nearly perfectly sinusoidal, so it's clear something is happening during sleep to my airflow.

Advice Needed

While I have been feeling a positive response to CPAP already, which is genuinely surprising for me to say after such a short time, so I don't want to get too lost in the weeds with the inspiratory flow if I'm improving. I will admit that I went into this expecting no response, so I think we can safely rule out placebo effect for me. However, I don't want to ignore what might be precipitating events since my reported AHI is still hanging around 5, and most of my events seem staged around the irregular inspiratory flow rates observed in the data. Thanks to anyone for your time reading and any advice you have.

Recently, the tubing on my frame ripped, and I had to get a new frame. I bought an offbrand frame because it was cheaper and while it works generally fine, I’ve noticed a couple of things. In the my air app, my seal rating has increased substantially – I don’t know whether that means the seal is better or worse. The picture attached shows the before and after (the couple days with no rating are the days the new frame was in transit).

I also noticed that I don’t feel like I’m getting as much air as I did with the old frame. It’s fine, but not exactly the same. I haven’t changed any settings on the machine at all - I honestly don’t even know how to.

And lastly, I’ve been waking up in the middle of the night, unable to go back to sleep. Now I have been super stressed, and I’ve been chalking it up to stress, but now I’m wondering whether it could have to do with the new frame.

Does anyone know how to interpret the seal rating in the my air app? Could the frame itself really be that impactful?

Hi everyone,
I’m a 50-year-old male from India. I was diagnosed with severe obstructive sleep apnea (AHI 63) in December 2025.
I’ve been on CPAP therapy using the ResMed AirSense 11 for about 4 months now. My AHI is consistently below 1 (often around 0.5–0.7), so therapy seems to be working well overall.
For masks:
I started with the Philips Wisp nasal mask

Switched to the ResMed N20 due to cushion availability issues

Tried the ResMed N30i, but couldn’t get a proper fit with my nostrils

Eventually ended up buying another Philips Wisp again

So now I have four masks 😄
The main issue:
The N20 “Large” size still doesn’t feel like the right fit for me (my nose is on the larger side)

The N30i was uncomfortable and I couldn’t adjust it properly

I’ve been adjusting my own settings using OSCAR and learning from this forum since good sleep clinics are hard to access where I live (we mostly rely on pulmonologists). I’m really grateful for the knowledge shared here—it has helped me get to a comfortable setup.
I’m sharing some OSCAR screenshots and would really appreciate feedback on:

1. Whether my therapy/settings look appropriate

2. Mask recommendations for someone with a larger nose

3. Any tips to make the N30i work better (if it’s worth retrying)

4. Anything else that I am doing wrong here.

Open to any suggestions or improvements.
Thanks in advance for your help.

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Hello everyone. I took a sleep test in December and have been struggling with CPAP as I wake up every 30 minutes. My guess is that I have a low arousal threshold. Here are some stats from my test:

AHI: 24

RDI: 36

Oxygen nadir: 87%

I have cycled through numerous masks and most recently landed on the F&P solo mask. It is excellent for comfort and I fall asleep easily but still get woken up. A few weeks ago, people mentioned that my leak rate could be keeping me awake. I got some mouth tape and got leaks down to virtually 0. However, I am still waking up.

I have tried lower pressure last night to see if that worked, but again, I woke up after 30 minutes. I have also tried ramp, no ramp, EPR 1-2-3, climate control, top level heat. Probably more as well.

Here is my SleepHQ share

Please keep in mind that the vast majority of my time with the mask on, I am awake. So I get a ton of sleep wake junk. Usually the last 30min-1hr before a day ends is when I am actually asleep. I show no events in these periods.

I'm curious how people have overcome this.

So here it is! Been on CPAP since Jan made a post earlier, got an SD, and saw my report! I did get a cervical collar which helped from my neck tucking in way better than a chinstrap did for me, also more comfortable ironically.

I noticed at times my mouth would begin blowing air out. I’m on day 4 of using the cervical collar. There are some nights that I still blow some air out of my mouth but I’m wondering if it’s how I’m positioned.

Has anyone experienced this. I started to wonder if my air pressure is too high?

CPAP Fam here it is...

https://sleephq.com/public/7719fedd-d866-4534-a7cc-b1d48ac65698

Hi all, 43yo Male, 5"9, ~170lbs, had a home sleep study recently which showed AHI of 7.1. Main reason my ENT wanted me to start CPAP is because blood oxygen was between 90-94% for 16% of the night (I've ordered a SleepHQ O2 ring and waiting for it to arrive). While these numbers don't seem that bad, I have been suffering from all the usual symptoms - frequent night wakings, snoring, brain fog etc.

I just started the CPAP about a week ago and finally uploaded data to SleepHQ. Would appreciate any insights on what I need to do to see improvement (leak rate seems to be an issue?). So far I haven't started to feel positive effects, but I have at least been able to wear the mask the whole night each night (except one night where I had to adjust a lot). I'm not feeling a lot of leaks around the mask (Philips Respironics, DreamWear full face), except at the front of the mask where the small holes are and at the holes on the tube connector. I have a Resmed AirSense 11 AutoSet and turned off ramp a couple nights ago.

Here is the link to my SleepHQ dashboard:

https://sleephq.com/public/6b318c8a-c2d6-467d-8e73-ca5c223c81bc

Thanks for your help!