First night, machine doesn’t give much data?

I was able to use the full face mask all night and my readings on machine are AHI 4.2, Total AI 3.9, central AI 1.5. Says I had it in 6.5 hrs but at least an hour was awake and trying it out I think. Original study was 8.7 AHI and 12.1 RDI, o2 nadir 87%.

Leak was 20L/min and pressure was 10 for last night (pressure is set min 7/max 12)

My oxygen is still dipping into the 80s according to other wearables so I don’t know if that will get better. I ordered an SD card so more data can be analyzed although I have no idea how to do that just know I need the card. It has always been the oxygen levels being all over the place that bothered me- can never be sure how accurate a Garmin watch etc is but also a couple o2 rings that seem to work well. I worry a bit about central apnea but I don’t know how they diagnose that.

I have had insomnia and felt bad waking up for a year or 2 and never imagined I had sleep apnea - I have no risk factors other than being post menopausal (which I never knew was even a risk factor). Finally did a home study because in lab appt was months out. I feel the severity of sleep deprivation and incredibly detrimental effects are not reflected in the apnea index.

Any input appreciated, thanks!

jumblegirl wrote: ↑

Sun Jun 12, 2022 8:31 am

my readings on machine are AHI 4.2, Total AI 3.9, central AI 1.5. Why would the total be less than the AHI? Original study was 8.2 AHI and 12.1 RDI.

Because there is another statistical data point that isn't overtly give but is part of the AHI numbers as a whole and that would be the Hyponea Index.

AHI is the Apnea/Hyponea Index

You have the AI or the apnea index which is a combination of the obstructive apneas and the central apneas
but the hyponea index has to be inferred.

Total AHI would be 4.2
composed of the apnea index which is 3.9 (and central index is 1.5 so that means the obstructive index is 2.4)

4.2 minus the 3.9 means the hyponea index would be 0.3.

Use OSCAR to see all the nitty gritty details.
OSCAR https://www.sleepfiles.com/OSCAR/
http://www.apneaboard.com/wiki/index.ph ... stallation
http://www.apneaboard.com/wiki/index.ph ... rpretation
http://www.apneaboard.com/wiki/index.ph ... ganization organize and how to do screen shots.
wiki/index.php/Oscar:organize Wiki

http://www.cpaptalk.com/viewtopic/t1585 ... eview.html

If your machine doesn't have a SD card in it you won't get the detailed data but you can go buy a SD card at WalMart and plug it in....SD card MUST be in the cpap machine to get the detailed data...and then use the OSCAR software.
8 GB is plenty big enough but those cards are getting hard to find...last time I looked 16 GB was the smallest I could find.
There is no need to get one of those big fancy high storage and expensive SD cards. 4 GB is more than enough but hard to find anyway.

No the machine doesn't give much data, but there is a free open source program that does. OSCAR!

• Put an SD Card in your Air 11. If it didn't come with one put any one in (4GB-8GB or larger)
• Download OSCAR - https://www.sleepfiles.com/OSCAR/
• Go through the pinned topics to learn how to format graphs
• Post graphs
• Use a single topic for your therapy topic, this one will do. You may want to rename it though as in a few days it will no longer be your first night

I ordered an SD card it comes today. I think it’s 32g but was cheap on Amazon. After I put it in the machine I assume I have to take it out and put into laptop and download software.

There was another way to analyze I think called sleepHQ has anyone used that ?

jumblegirl wrote: ↑

Sun Jun 12, 2022 9:09 am

I ordered an SD card it comes today. I think it’s 32g but was cheap on Amazon. After I put it in the machine I assume I have to take it out and put into laptop and download software.

You can download, install the software, and create your profile now.

Once you get the SD Card, put it in the machine and ensure it is in your machone overnight while using the CPAP.

Then when you want to transfer the data, remove the SD Card from your CPAP, run OSCAR and import it. Remember to put the SD Card back into the CPAP.

jumblegirl wrote: ↑

Sun Jun 12, 2022 9:34 am

There was another way to analyze I think called sleepHQ has anyone used that ?

SleepHQ is relatively new. Not nearly as popular and well received as OSCAR. Give it time though.

Thanks hopefully I will be able to have better data tomorrow. It doesn’t seem like the machine or myAir saves data from even the day before other than AHI - I don’t see the leak or pressure or total AI or central Ai #s from yesterday although I didn’t use the machine long.

Do I just put SD card into my lap top and Oscar will find the data or is it obvious how to run Oscar and import the data? Is the Resmed machine measuring sp02, it must be, yet there are no results anywhere on their app.

jumblegirl wrote: ↑

Sun Jun 12, 2022 12:25 pm

Is the Resmed machine measuring sp02, it must be, yet there are no results anywhere on their app.

No. The ResMed machines don't measure oxygen levels at all unless you have a very special (and expensive) pulse oximeter integrated into the ResMed machine.

Now there are stand alone overnight recording pulse oximeters that will measure oxygen levels and are compatible with OSCAR but they are totally separate from the cpap machine.

Look at the links I posted above and I think most of your questions will be answered as to how OSCAR works.

The machine stores very little data on its own internal storage. Mainly summary numbers like AHI, 95% leak and pressure numbers. You can get pretty much the same data off the machine's LCD screen as you can get from MyAir.
All the detailed data files have to go directly on to the SD card during the night.

How can it give an AHI without pulse ox data? I thought that was how it was measured at least in part - during the sleep study too. I do have rings that measure overnight pulse ox so would be great to integrate with Oscar. One is go2sleep the other is wellue.

jumblegirl wrote: ↑

Sun Jun 12, 2022 12:48 pm

How can it give an AHI without pulse ox data? I thought that was how it was measured at least in part - during the sleep study too. I do have rings that measure overnight pulse ox so would be great to integrate with Oscar. One is go2sleep the other is wellue.

AHI measurement doesn't need pulse ox data.

AHI can be measured by measuring airflow. When you stop (or slow down) breathing airflow stops (or slows down) and that is easily measured by CPAPs flow and pressure sensors.

I thought there needed to be a certain reduction in o2 also? At least for hypopnea ? My sleep study did not even have an airflow measurement just the pulse ox, positional stick on thing and the WatchPAT.

What about the oxygen desaturation index and respiratory distress index, how are they part of the diagnosis?

jumblegirl wrote: ↑

Sun Jun 12, 2022 1:29 pm

I thought there needed to be a certain reduction in o2 also? At least for hypopnea ? My sleep study did not even have an airflow measurement just the pulse ox, positional stick on thing and the WatchPAT.

Perhaps your right.

Millions of CPAPs simply don't work and can't be trusted.

How should we get the word out?

I was thinking more that the home sleep study wasn't that accurate without measurement of air flow.

and I thought RDI and ODI were part of the sleep apnea diagnosis or why do they measure them?

CPAPs determine AHI by measuring airflow.

That doesn't mean that other devices such as home sleep units and lab-based polysomnograph have to use the same method.