Feeling awful even with low AHI

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PotatoEater
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Feeling awful even with low AHI

Post by PotatoEater » Wed Sep 04, 2024 9:40 am

I've been on CPAP for a while, and although I've gotten excellent data results I've never slept well. I was diagnosed with very mild sleep apnea, started with APAP 4-20 with EPR 3, then later switched to a bilevel to see if I could reduce flow limits. Despite a very low event count I was still waking up early and un-rested. For this reason I suspect I have UARS of some kind.

The main culprit I can identify is my nasal breathing, sometimes I wake up with it being difficult to breathe through the nose since I have narrow nasal passages and chronic allergies. I've been able to minimize my congestion with nasal spray and allergy shots, but it still persists. As for my PAP machine, I've tried a whole lot of guessing as to what settings I should be using, but it seems that nothing works. Here's the data from last night, PS 4, EPAP 8. Perhaps I need to go all the way back to default settings and try again from there?
screenshot-20240904-082744.png
screenshot-20240904-082744.png (102.73 KiB) Viewed 6532 times
Here's an arguably more successful night, PS 4, EPAP 5
screenshot-20240904-083252.png
screenshot-20240904-083252.png (105.71 KiB) Viewed 6532 times
As a side note, I'm wondering if my nasal breathing is something I should be concerned about. I can just open my mouth if I have trouble breathing right?
Last edited by PotatoEater on Wed Sep 04, 2024 10:12 am, edited 1 time in total.

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Re: Feeling awful even with low AHI

Post by Pugsy » Wed Sep 04, 2024 9:47 am

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See above please.

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Re: Feeling awful even with low AHI

Post by PotatoEater » Wed Sep 04, 2024 10:14 am

My bad, definitely should've read the before you post instructions closer. I currently do not take any medication besides Fexofenadine (Allegra, non drowsy anti allergy medication).

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Re: Feeling awful even with low AHI

Post by Miss Emerita » Wed Sep 04, 2024 11:03 am

Yes, if you can't breathe through your nose while you're asleep, you will automatically start breathing through your mouth.

I see you are using two masks: one FF and one pillows. You seem to have few leaks with the pillow mask; is it comfortable for you?

For what it's worth, my allergist at one point had me using Flonase, azelastine spray, and montelukast pills. I mention this just in case you'd like to pursue any of those options with your doctor.

Can you tell us about the breaks in therapy for the two nights whose charts you've posted?

When you say you don't sleep well, are you saying that you feel you wake up often during the night, or perhaps wake up for long periods of time? Or is it mainly that you don't feel rested during the day?
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Re: Feeling awful even with low AHI

Post by PotatoEater » Wed Sep 04, 2024 11:17 am

The nasal pillows work well, however I recently switched to full face mask to experiment with higher pressures (my mouth would blow open with the pillows on lower pressures). I also wanted to see if perhaps being able to open my mouth would help with therapy.

The breaks come from me waking up early. Last night (with the large gap) was probably a outlier (I likely woke up, took the mask off, and then fell asleep without realizing it). The break in the other chart is from me waking up, using the restroom, and then going back to bed to try to get more sleep (that chart is what most of my nights look like). The short breaks at the beginning are me trying to go to bed too early, and then leaving the bed for a bit to try again later.

When I say I don't sleep well usually it means that I wake up too early - at like 4 or 5 am. I'm not sure if I actually fall asleep again when I stay in bed for an hour or two longer after that. I don't feel very rested during the day, I'm quite drowsy but it's masked with anxiety. I assume that anxiety stems from poor sleep.

I'll try mentioning the medications you brought up with my doctor once I get one. I had to switch sleep doctors recently (they weren't very familiar with CPAP tech), so I'm back on the waitlist. I'm hopefully going to get a proper lab titration then, but it might take months.
Last edited by PotatoEater on Wed Sep 04, 2024 11:52 am, edited 1 time in total.

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Re: Feeling awful even with low AHI

Post by zonker » Wed Sep 04, 2024 11:34 am

PotatoEater wrote:
Wed Sep 04, 2024 11:17 am


When I say I don't sleep well usually it means that I wake up too early - at like 4 or 5 am. I
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Re: Feeling awful even with low AHI

Post by PotatoEater » Wed Sep 04, 2024 11:40 am

I'm trying to adhere to CBT principles (avoiding going to bed when not tired + having a consistent bedtime), so I try to go to bed at 11:30 pm. Of course, sometimes I get too fatigued and go to bed early, which usually doesn't work.

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Re: Feeling awful even with low AHI

Post by PotatoEater » Wed Sep 04, 2024 11:41 am

One of the things I'm worried about is that I feel like maybe CPAP therapy is or has worked just fine for me and I'm stressing over the settings for no good reason. While I have seen marginal improvement ever since I started (I don't wake up every 2-3 hours, and I don't get heart pounding when I wake up anymore), I feel like I still have many sleep apnea symptoms - trouble sleeping enough, anxiety, heart palpitations, fatigue. I've been on CPAP therapy for around 5 months now.

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Re: Feeling awful even with low AHI

Post by robysue1 » Wed Sep 04, 2024 1:26 pm

PotatoEater wrote:
Wed Sep 04, 2024 9:40 am
I've been on CPAP for a while, and although I've gotten excellent data results I've never slept well. I was diagnosed with very mild sleep apnea, started with APAP 4-20 with EPR 3, then later switched to a bilevel to see if I could reduce flow limits. Despite a very low event count I was still waking up early and un-rested. For this reason I suspect I have UARS of some kind.
The data you posted does not show any flow limitations of significance. In other words, on the nights you posted data for, the pressure settings were plenty for smoothing out any kind of UARS-related flow limitation problems as well as preventing almost all obstructive events.

But your flow rate curve seems a bit "spiky" when looked at in the given (full night) scale. Which begs the question: Are you having a lot of spontaneous arousals that you don't remember and that are not caused by sleep disordered breathing? And if you are, what can you do to try to minimize the number of spontaneous arousals?

Please keep in mind that minimizing spontaneous arousals can be devilishly hard---specifically because they're not caused by something that is easy to fix.

The main culprit I can identify is my nasal breathing, sometimes I wake up with it being difficult to breathe through the nose since I have narrow nasal passages and chronic allergies. I've been able to minimize my congestion with nasal spray and allergy shots, but it still persists. As for my PAP machine, I've tried a whole lot of guessing as to what settings I should be using, but it seems that nothing works.
First, nighttime nasal congestion might be part of what's causing some of the spontaneous arousals. When dealing with nighttime nasal congestion, the settings to look at are not the pressure settings. Rather, you need to think about the settings you are using on the humidifier and heated hose (if you are using a heated hose).

So more questions:

1) What humidifier setting are you using?

2) Are you using a heated hose? If so, what is the hose temp set for?

3) When you are dealing with daytime nasal congestion, does taking a hot steamy shower help clear your congestion or does it make it worse?

4) What kind of nasal spray have you been using? Something like Flonase (i.e. a nasal steroid)? Or something like Afrin (a nasal decongestant)? Or just a plain, simply saline spray?

5) Have you ever tried a neti pot or nasal rinse?

As a side note, I'm wondering if my nasal breathing is something I should be concerned about. I can just open my mouth if I have trouble breathing right?
If you use a full face mask you can open your mouth and breathe through it without causing large leaks that can lead to ineffective therapy.

If you use a nasal mask or a nasal pillows mask, opening your mouth up and breathing through it is likely to cause some significant large leaks that will adversely affect the efficacy of your xPAP therapy as well as lead to some significant dry mouth problems.

Also worth pointing out: Both small, pesky leaks and official large leaks can cause spontaneous arousals where you wake up just enough to try to fiddle with the mask to fix the leak.

Later you write:
PotatoEater wrote:
Wed Sep 04, 2024 11:17 am
When I say I don't sleep well usually it means that I wake up too early - at like 4 or 5 am. I'm not sure if I actually fall asleep again when I stay in bed for an hour or two longer after that. I don't feel very rested during the day, I'm quite drowsy but it's masked with anxiety. I assume that anxiety stems from poor sleep.
As hard and as unwelcome as it sounds, you may be aggravating the problem by lying in bed for an hour or two after you wake up worrying about your inability to get back to sleep. I bet you also do a bit of "clock watching"---as in calculating how much time you have to try to get some sleep before your alarm goes off and it's time to get up anyway.

In all seriousness, you may be better off just getting out of bed when you wake up and you can't get back to sleep within about 15 minutes. Do something relaxing and fun, but quiet. Allow yourself to enjoy the peace and stillness of the house and the early morning. And if you find yourself starting to yawn in an hour or so, go back to bed and sleep some more until it is time for you to get up.

As for the anxiety: I think you've gotten yourself into what's called a positive feedback loop: The worse you sleep, the more anxious you are about a lot of things, including the "bad sleep", and the more anxious you are, the worse your sleep is. In other words, the bad sleep and the anxiety feed off each other and your trapped in an escalating cycle:

.... bad sleep causes anxiety which causes more bad sleep which causes more anxiety which causes more bad sleep which causes more anxiety ....

And it doesn't matter which came first, the bad sleep or the anxiety at this point.

Breaking out of nasty positive feedback loops is difficult. In your case, I think it is important to do your best to not get over anxious about the sleep quality, even though that's a very, very hard thing to do when it feels like it's been months since you have slept well enough to feel genuinely good during the daytime.

You also write:
PotatoEater wrote:
Wed Sep 04, 2024 11:40 am
I'm trying to adhere to CBT principles (avoiding going to bed when not tired + having a consistent bedtime), so I try to go to bed at 11:30 pm. Of course, sometimes I get too fatigued and go to bed early, which usually doesn't work.
More questions: What happens when you get so fatigued that you go to bed early? How does this not work for you? Do you mean you can't get to sleep even though you are very, very tired and exhausted and physically fatigued? Or do you mean going to be early increases the chance that you will wake up at 4:00 AM and not be able to get back to sleep? It's important for us to understand what goes wrong when you just go to bed early.

And some more questions:

1) What is your desired sleep schedule? In other words, when would you prefer to get up each day? And when would you prefer to go to bed each night?

2) Any chance that you more of a morning lark than a night owl? By that I mean: Is it possible that your body would prefer to be on an earlier sleep schedule than your brain thinks is appropriate? As an example, there are plenty of people out there whose body prefers to sleep from 9:00 PM to 5:00 AM instead of from 11:30 PM to 8:30 AM. And if a 9:00 PM to 5:00 AM sleep schedule works for their lifestyle, then they're happiest just going to bed rather early and getting up at the proverbial "crack of dawn".

It's important to answer both of these sets of questions before trying to set up a consistent sleep schedule for yourself. If your body wants to be a morning lark, you need to set both a bedtime and wake up time that is consistent with when the body wants to be asleep, even if the brain has the knee-jerk reaction that nobody in their right mind wants to get up at 4:30 AM every day.

Best of luck in sorting out a sleep schedule that works for both your body and your brain. And I say that as a night owl who has had to accept that for the most part my body would prefer to sleep from about 2:00 AM to about 9:30 AM most of the time.


Finally you write:
PotatoEater wrote:
Wed Sep 04, 2024 11:41 am
One of the things I'm worried about is that I feel like maybe CPAP therapy is or has worked just fine for me and I'm stressing over the settings for no good reason. While I have seen marginal improvement ever since I started (I don't wake up every 2-3 hours, and I don't get heart pounding when I wake up anymore), I feel like I still have many sleep apnea symptoms - trouble sleeping enough, anxiety, heart palpitations, fatigue. I've been on CPAP therapy for around 5 months now.
First, it's worth noting that CPAP is a process. It does take some people many months to start feeling genuinely better. And when "feeling better" finally starts, the difference can be subtle and easy to miss. In my case the first signs that CPAP was doing something positive for me was when I noticed the phrase "woke up with no hand or foot pain" in the insomnia log that I was keeping during my first War on Insomnia. I'd been waking up feeling like my hands and feet had been tightly clenched into fists all night long for several years before my OSA diagnosis. I think it was a flight or fight response that was happening every time I had a hypopnea or apnea before my diagnoses.

Second, not everything is related to OSA and CPAP. CPAP fixes one thing----sleep disordered breathing. It does not fix bad sleep caused by anything other than sleep disordered breathing. If there are multiple causes the sleep is bad, then fixing the sleep disordered breathing by using CPAP can still leave the person with bad sleep caused by other things. In your case, those "other things" might be as simple as getting a better handle on the nighttime congestion and whether its causing microarousals at night. Or it might be as complex as dealing with the "wake too early and can't get back to sleep" type of insomnia that you've described. Or it might be a combination of both of them. Or it could be something else.

Third, daytime fatigue and heart palpitations are symptoms that can be caused by a whole lot of things other than bad sleep and (untreated) OSA. It's worth talking to your primary care physician and specifically asking them: What other than sleep disordered breathing and my current bad sleep might be causing these symptoms that ought to be investigated? Should I have a referral to a cardiologist to find out whether the heart palpitations are a new health problem that needs to be treated as a heart condition?
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Re: Feeling awful even with low AHI

Post by PotatoEater » Wed Sep 04, 2024 2:29 pm

First of all, I'd like to say I really appreciate that you put the time and effort to bang all those words out for me. I'll try to answer your questions.

Spontaneous arousal: I'm not sure about whether I get spontaneous arousals or not. I can't think of any obvious environmental reasons, my bedroom is quiet and comfortable. Is it possible to spot those with a pulse oximeter? I could post a chart with that data after this night. That would be the only way I can track down something I can't remember right now.

Congestion:
1. I am using humidity level 5. I'm a bit worried going higher might cause condensation to form inside my mask.
2. I am using a heated hose, temp max at 86f.
3. A hot shower helps my congestion a lot, it's what I do when my allergies get bad.
4. I used flonase but it didn't do much. I switched to nasonex (which advertises itself as anti-allergy) and it seems to help more. It's effects are most obvious when I have moderate allergies.
5. I have not tried using a neti pot. I'll try getting one soon.

Going to bed when fatigued:
What I mean by this is that I become mentally and/or physically exhausted and go to bed earlier than 11:30. However, I almost never actually fall asleep that much earlier when I do this - I tend to simply spend more time awake in bed before I fall asleep. I think it's because I still feel jittery despite being tired, or maybe because of the mental connection I've made with that time now.

Sleep schedule:
1. My dream sleep schedule would be being able to go to bed at 9 and waking up at 7:30.
2. It is possible that the sleep schedule I chose is inconsistent with my body's natural tendencies. The reason why I go to bed so late - 11:30 is that when I started CBT I realized that with my original bedtime (9:00) I spent a lot of time awake in bed trying to fall asleep. I figured that if I pushed my bed time back it would help, and I think it did. However, actually staying up that late is pretty difficult at times.


As for anxiety, I'm almost certain that it's a cycle like you described. I know it's possible to break out of this mindset, as I was able to do so briefly, although I've reverted back to stressing over my sleep again recently.
I'll try to just get out of bed if I wake up early from now on.
If both of my CPAP charts look fine from a data standpoint, I think I'll revert to using nasal pillows and a lower pressure setting since it was more comfortable.
Finally, other factors. I'll try asking my primary doctor for any possible causes the next chance I get. I've already for the most part ruled out heart problems - I did some testing and they couldn't detect anything unusual even with specialized equipment.

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Re: Feeling awful even with low AHI

Post by robysue1 » Wed Sep 04, 2024 3:01 pm

PotatoEater wrote:
Wed Sep 04, 2024 2:29 pm
Spontaneous arousal: I'm not sure about whether I get spontaneous arousals or not. I can't think of any obvious environmental reasons, my bedroom is quiet and comfortable. Is it possible to spot those with a pulse oximeter? I could post a chart with that data after this night. That would be the only way I can track down something I can't remember right now.
I don't need the pulse oximeter data: You can see the arousals in the flow rate curve if you know what to look for. And it's usually quite easy to figure out whether the cause of an arousal might be related to a sleep disordered breathing problem (i.e. a hypopnea, an OA, snoring, or a flow limitation) or something else. Or, when there seems to be nothing that caused it, that's when you know it's just a spontaneous arousal.

Worth remembering: A certain number of spontaneous arousals are to be expected. When we need to turn over in bed, we arouse in order to do it. We also typically arouse briefly after every REM cycle.

More in the next post. My husband is here to take me home from the office.
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Re: Feeling awful even with low AHI

Post by zonker » Wed Sep 04, 2024 6:02 pm

PotatoEater wrote:
Wed Sep 04, 2024 11:40 am
I'm trying to adhere to CBT principles (avoiding going to bed when not tired + having a consistent bedtime), so I try to go to bed at 11:30 pm. Of course, sometimes I get too fatigued and go to bed early, which usually doesn't work.
pay attention to what robysue1 tells you, if you want to go down that path. she's one of the forum's best when it comes to advice.

me, personally? I wouldn't worry about it. one finds that under CPAP one doesn't require as much sleep as one did without it.

good luck!
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Re: Feeling awful even with low AHI

Post by PotatoEater » Fri Sep 06, 2024 8:18 am

How would you spot an respiratory related arousal? I'm assuming that you would look for unusual flow rate activity and correlate it with some other data oscar provides?

As a side note, I was about to report on how the last two nights were quite tumultuous sleep wise, until I realized that when I changes my mask back to the pillows I forgot to change the machine mask settings. This isn't even the first time this has happened. Maybe I'll need to write a reminder in big permanent marker on my masks to ensure I never forget.

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Re: Feeling awful even with low AHI

Post by robysue1 » Fri Sep 06, 2024 11:05 am

PotatoEater wrote:
Fri Sep 06, 2024 8:18 am
How would you spot an respiratory related arousal? I'm assuming that you would look for unusual flow rate activity and correlate it with some other data oscar provides?
Typically an arousal is going to involve a few sudden larger than normal sleep-breathing inhalations since normal sleep breathing is significantly shallower than normal wake breathing. It's also important to understand that even normal people have arousals---such as when they turn over in bed or adjust the covers and/or pillows or at the end of REM cycles or if their bed partner or pets move around in bed. Most of these arousals are ones that people don't remember when they wake up because they are so short and they are not considered a sign of any kind of sleeping problem. It's also worth noting that spontaneous arousals typically increase as we grow older---in other words, old people simply don't sleep as well as younger ones.

A respiratory related arousal is one that comes immediately after an OA, a CA, a hypopnea, or a RERA is scored by the machine. Some people would throw into that definition an arousal that clearly happens after snoring is being scored or after flow limitations are being scored.

But if the arousal breathing occurs before an event is scored or before snoring is scored or before any flow limitations are scored, then the arousal is unlikely to have been caused by sleep disordered breathing. Rather the event(s) scored right after the arousal are most likely just part of the normal transition back to sleep being mis-scored by the machine: Our machines cannot tell when we're awake and when we're asleep. And they are programmed to assume that whatever breathing we are doing during the night is supposed to be sleep breathing. So if we arouse and if our normal wake breathing or sleep transition breathing is sufficiently ragged, it can fool the machine into scoring false positives---i.e. "events" that would never be scored on an in-lab sleep test.
As a side note, I was about to report on how the last two nights were quite tumultuous sleep wise, until I realized that when I changes my mask back to the pillows I forgot to change the machine mask settings. This isn't even the first time this has happened. Maybe I'll need to write a reminder in big permanent marker on my masks to ensure I never forget.
Yep. That kind of thing can play havoc with one's sleep. Making a written reminder to yourself may very well be useful.
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Re: Feeling awful even with low AHI

Post by Miss Emerita » Fri Sep 06, 2024 11:15 am

Just so you know: Flonase takes a couple of weeks to kick in. Instead of a neti pot, you might want to try NeilMed rinse kit. I found it helpful to watch a couple of videos before trying to do the rinse. It feels a little weird, but it's good at clearing out gunk.
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