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SleepyHead shows AHI spike about the same time every night
#11
yep. there is more to see when you zoom in on sections of the graph. But, even at this size, you can see:

1. you breathe differently at different parts of the night.
2. you can see how your snore was spaced out, or clumped together.
3. you can see that some of the apneas that were counted in your other chart were Clear Airway, others were obstructive, and where they happened.
4. there are hypopneas as well.

These interest points just coax you to look closer at those regions, with "I wonder what made me breathe that way!?", or "looks like I got a nice patch of calm sleep there!"

So, just for grins, zoom up on your chart and post 2 - 5 minute snips of sleep one at 1:00 and another at 2:45 (if you are up to it).

QAL





Dedicated to QALity sleep.
You'll note I am listed as an Advisory Member. I am honored to be listed as such. See the fine print - Advisory Members as a group provide advice and suggestions to Apnea Board administrators and staff concerning Apnea Board operation and administrative policies. Membership in the Advisory Member group should not be understood as in any way implying medical expertise or qualification for advising Sleep Apnea patients concerning their treatment.
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#12
(07-14-2015, 10:34 PM)quiescence at last Wrote: So, just for grins, zoom up on your chart and post 2 - 5 minute snips of sleep one at 1:00 and another at 2:45 (if you are up to it).

1 AM:
[Image: CbFVDyP.png]

2:45 AM:
[Image: N9BJ8jv.png]

I found this interesting looking stuff at 1:10 AM:
[Image: Ch54sFK.png]
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#13
I have a question for everyone else. The first flow rate graph. To me it looks like it shows no exhalations, only inhalations. How does this happen?

Best Regards,

PaytonA

Admin Note:
PaytonA passed away in September 2017
Click HERE to read his Memorial Thread

~ Rest in Peace ~
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#14
Payton, the same question occurred to me. I can speculate it is incomplete exhalation, and further, it appears to coincide with the period of higher AHI. It may be a REM breathing pattern for this person, but I'd like to hear from anyone that actually knows. I looked back at the data summary and the Tidal volume is high overall, so it might be interesting to see if the Tidal Volume also drops when this breathing pattern is observed.
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#15
(07-15-2015, 10:37 AM)Sleeprider Wrote: Payton, the same question occurred to me. I can speculate it is incomplete exhalation, and further, it appears to coincide with the period of higher AHI. It may be a REM breathing pattern for this person, but I'd like to hear from anyone that actually knows. I looked back at the data summary and the Tidal volume is high overall, so it might be interesting to see if the Tidal Volume also drops when this breathing pattern is observed.

Here's the Tidal Volume graph for that same period:

[Image: 71ntFSE.png]
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#16
Well it doesn't tell us much except that for this period your Tidal Volume at 458 is well below the average of 680, shown in Post #8.

I think that the period where less expiratory volume occurs is REM. http://europepmc.org/backend/ptpmcrender...obtype=pdf It is not unexpected that the breathing flow pattern changes with sleep stage, and that that also corresponds to REM, even though we can't prove this assumption with EEG. Interesting stuff. I think (but am not positive), that a PRS1 560 APAP would see that change in respiratory volume and rate, and attempt to ramp pressure to evaluate if it could improve breathing. The ability to respond to changing pressure needs from sleep stage respiratory changes is one of the advantages of that machine, provided the pressure changes themselves don't become disruptive.

That said, you're doing just great for someone early in the therapy, and it will be interesting to see what feedback you get from your doctor.
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#17
My point, concerning the first flow rate graph, is that it looks impossible to me to have reasonable inhalation flow with mostly miniscule exhalation flow for a full 5 minutes. I may be missing something and if so, I am wondering what it is.

Best Regards,

PaytonA

Admin Note:
PaytonA passed away in September 2017
Click HERE to read his Memorial Thread

~ Rest in Peace ~
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#18
It may just be the rate of inhalation vs the rate of exhalation that is different. One would have to integrate the area under each section of the curves to compare the actual air volume. The time spent inhaling looks less to me by 1/2. Might it be a "sniff and slow exhale" type action? I would also expect the tidal volume to be less for this kind of breathing. Try it.
Am I imagining this?
if you can't decide then you don't have enough data.
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#19
(07-15-2015, 06:23 PM)MobileBasset Wrote: It may just be the rate of inhalation vs the rate of exhalation that is different. One would have to integrate the area under each section of the curves to compare the actual air volume. The time spent inhaling looks less to me by 1/2. Might it be a "sniff and slow exhale" type action? I would also expect the tidal volume to be less for this kind of breathing. Try it.
Am I imagining this?

You could be right but I just do not see much area on the exhale side of the graph and I am usually pretty good at estimating comparative areas and volumes.

Best Regards,

PaytonA

Admin Note:
PaytonA passed away in September 2017
Click HERE to read his Memorial Thread

~ Rest in Peace ~
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#20
Just an aside... last night was my best AHI report so far (1.54) and the longest I've slept with the machine since I got it (8 hrs 27 mins). Sleep-on-pillow

Way-to-happy Way-to-happy Way-to-happy
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