But don't, since I've coasted along fine for the last few years thinking everything was just fine. But since a recent move and new bed, it's like I'm starting all over again, so here goes:
1. Which of the three pressure metrics do you pay the most attention to, and why? I'm talking about max pressure, 95% pressure and median pressure. Maybe it depends on what you're going to use the pressure to inform you about?
2. In SH there is what appears to be an hourly AHI chart. If your overall AHI for the entire night is acceptable (say under 2.0), how much do you worry about bursts through the night where it goes much higher, say 10-15 for various periods?
Thanks for opinions.
Two noob questions that I should know the answers to
Two noob questions that I should know the answers to
_________________
Machine: ResMed AirSense™ 10 AutoSet™ CPAP Machine with HumidAir™ Heated Humidifier |
Mask: DreamWear Full Face CPAP Mask with Headgear (Small and Medium Frame Included) |
Additional Comments: Pressure 11.0 Min-->14.0 Max EPR 2 |
Re: Two noob questions that I should know the answers to
None of them. they're all just curiosity statistics. What matters is the way the pressure curve behaves during the night.old dude wrote: ↑Thu May 02, 2019 4:56 pmBut don't, since I've coasted along fine for the last few years thinking everything was just fine. But since a recent move and new bed, it's like I'm starting all over again, so here goes:
1. Which of the three pressure metrics do you pay the most attention to, and why? I'm talking about max pressure, 95% pressure and median pressure. Maybe it depends on what you're going to use the pressure to inform you about?
As far as I'm concerned, the AHI chart is useless. All it's good for is saying "oh, look, you had several events around this time", which you can easily see just by glancing at the flags chart.
Get OSCAR
Accounts to put on the foe list: dataq1, clownbell, gearchange, lynninnj, mper!?, DreamDiver, Geer1, almostadoctor, sleepgeek, ajack, stom, mogy, D.H., They often post misleading, timewasting stuff.
Accounts to put on the foe list: dataq1, clownbell, gearchange, lynninnj, mper!?, DreamDiver, Geer1, almostadoctor, sleepgeek, ajack, stom, mogy, D.H., They often post misleading, timewasting stuff.
- zoocrewphoto
- Posts: 3732
- Joined: Mon Apr 30, 2012 10:34 pm
- Location: Seatac, WA
Re: Two noob questions that I should know the answers to
I agree with palerider.
I never look at those pressure numbers. I look at the pressure graph. I like to see a graph that is mostly boring, with maybe a few spikes. But not constantly up and down. If it goes up and down a lot, then I raise the minimum until the graph looks fairly boring. The minimum pressure should be high enough to prevent most events, and it should only need to go up as your need goes up, such as sleeping on your back and/or REM sleep.
The ahi per hour doesn't help either. There are two many goals with ahi. Low for the night, and not too many clusters. It also helps to know if the events are long and get rid of those, but that doesn't show up in the numbers.
I never look at those pressure numbers. I look at the pressure graph. I like to see a graph that is mostly boring, with maybe a few spikes. But not constantly up and down. If it goes up and down a lot, then I raise the minimum until the graph looks fairly boring. The minimum pressure should be high enough to prevent most events, and it should only need to go up as your need goes up, such as sleeping on your back and/or REM sleep.
The ahi per hour doesn't help either. There are two many goals with ahi. Low for the night, and not too many clusters. It also helps to know if the events are long and get rid of those, but that doesn't show up in the numbers.
_________________
Mask: Quattro™ FX Full Face CPAP Mask with Headgear |
Humidifier: S9™ Series H5i™ Heated Humidifier with Climate Control |
Additional Comments: Resmed S9 autoset pressure range 11-17 |
Who would have thought it would be this challenging to sleep and breathe at the same time?
Re: Two noob questions that I should know the answers to
that's what I look for too.zoocrewphoto wrote: ↑Fri May 03, 2019 1:56 amI agree with palerider.
I never look at those pressure numbers. I look at the pressure graph. I like to see a graph that is mostly boring, with maybe a few spikes. But not constantly up and down. If it goes up and down a lot, then I raise the minimum until the graph looks fairly boring. The minimum pressure should be high enough to prevent most events, and it should only need to go up as your need goes up, such as sleeping on your back and/or REM sleep.
Get OSCAR
Accounts to put on the foe list: dataq1, clownbell, gearchange, lynninnj, mper!?, DreamDiver, Geer1, almostadoctor, sleepgeek, ajack, stom, mogy, D.H., They often post misleading, timewasting stuff.
Accounts to put on the foe list: dataq1, clownbell, gearchange, lynninnj, mper!?, DreamDiver, Geer1, almostadoctor, sleepgeek, ajack, stom, mogy, D.H., They often post misleading, timewasting stuff.
Re: Two noob questions that I should know the answers to
Is there any way to reliably identify REM sleep from a SH chart? I've always considered a higher pressure plateau that occurs at appx. 90 minutes after sleep onset to be REM, but I could be reaching here.zoocrewphoto wrote: ↑Fri May 03, 2019 1:56 amI agree with palerider.
I never look at those pressure numbers. I look at the pressure graph. I like to see a graph that is mostly boring, with maybe a few spikes. But not constantly up and down. If it goes up and down a lot, then I raise the minimum until the graph looks fairly boring. The minimum pressure should be high enough to prevent most events, and it should only need to go up as your need goes up, such as sleeping on your back and/or REM sleep.
The ahi per hour doesn't help either. There are two many goals with ahi. Low for the night, and not too many clusters. It also helps to know if the events are long and get rid of those, but that doesn't show up in the numbers.
_________________
Machine: ResMed AirSense™ 10 AutoSet™ CPAP Machine with HumidAir™ Heated Humidifier |
Mask: DreamWear Full Face CPAP Mask with Headgear (Small and Medium Frame Included) |
Additional Comments: Pressure 11.0 Min-->14.0 Max EPR 2 |
Re: Two noob questions that I should know the answers to
No real accurate way to identify REM with the data available from the machine.
But...your 90 minute idea..that's fairly commonplace. First REM is normally around 90 minutes after sleep onset.
If you google "sleep stages" and then look at some nice normal hypnograms then you can get and idea when REM usually happens (assuming we don't have major wake ups in the middle to mess with the cycles) and get a fairly decent idea when you are having REM.
The first is typically about 90 minutes after sleep onset is not very prolonged...the rest of them start coming on more frequently and lasting longer as the night progresses.
The greatest amount of REM occurs in those wee hours of the morning.
But...your 90 minute idea..that's fairly commonplace. First REM is normally around 90 minutes after sleep onset.
If you google "sleep stages" and then look at some nice normal hypnograms then you can get and idea when REM usually happens (assuming we don't have major wake ups in the middle to mess with the cycles) and get a fairly decent idea when you are having REM.
The first is typically about 90 minutes after sleep onset is not very prolonged...the rest of them start coming on more frequently and lasting longer as the night progresses.
The greatest amount of REM occurs in those wee hours of the morning.
_________________
Machine: AirCurve™ 10 VAuto BiLevel Machine with HumidAir™ Heated Humidifier |
Additional Comments: Mask Bleep Eclipse https://bleepsleep.com/the-eclipse/ |
I may have to RISE but I refuse to SHINE.
If you want to try the Eclipse mask and want a special promo code to get a little off the price...send me a private message.
If you want to try the Eclipse mask and want a special promo code to get a little off the price...send me a private message.
- Jay Aitchsee
- Posts: 2936
- Joined: Sun May 22, 2011 12:47 pm
- Location: Southwest Florida
Re: Two noob questions that I should know the answers to
viewtopic.php?t=175444&p=1299718#p1299718
My "pressure plateaus" roughly correspond to these periods of more erratic respiration rates as well.Jay Aitchsee wrote: ↑Tue Apr 09, 2019 5:48 pmHave a look at this: viewtopic/t158359/Tracking-sleep-stages.html#p1218669 A comparison to SleepyHead and a ResMed S+ sleep tracker, reproduced below.
Generally, one might expect fluctuations in Respirartory Rate during REM. In the comparison graphics below, one can see that REM periods identified by the S+ Tracker roughly correspond to periods of increased fluctuations in Respiratory Rate (Which could also represent awake periods).
The example below shows a very strong correlation between what the S+ tracker thinks is REM and more erratic Respiration Rate, where S+ sleep stages are represented by: Red=Wake, Gold=REM, Blue=Deep, and Green=Light
As stated, the only way to know for sure what sleep stage one is in is through lab analysis, although many OTC trackers claim to be able to accurately report them.
_________________
Mask: AirFit™ P10 Nasal Pillow CPAP Mask with Headgear |
Additional Comments: S9 Auto, P10 mask, P=7.0, EPR3, ResScan 5.3, SleepyHead V1.B2, Windows 10, ZEO, CMS50F, Infrared Video |
- Jay Aitchsee
- Posts: 2936
- Joined: Sun May 22, 2011 12:47 pm
- Location: Southwest Florida
Re: Two noob questions that I should know the answers to
So below I've added the pressure graphic to the above example. I think it shows a very strong correlation between increased pressure and what the S+ has identified as REM (gold bars)
_________________
Mask: AirFit™ P10 Nasal Pillow CPAP Mask with Headgear |
Additional Comments: S9 Auto, P10 mask, P=7.0, EPR3, ResScan 5.3, SleepyHead V1.B2, Windows 10, ZEO, CMS50F, Infrared Video |