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Aircurve 10 CS Pavewave showing no CAs
#1
Aircurve 10 CS Pavewave showing no CAs
This is a quick question whilst I have 5 minutes pending a longer thread on my Sleepyhead results.

I used a Resmed S9 for a long time.  The AHI data showed few hypo, obstructive or classified apneas, rarely above 1.0 in total, but lots of CAs, typically 10-20.

I was changed to a Aircurve 10 CS Pavewave in PAP Mode: ASVAuto Min EPAP 4.0 Max IPAP 30.0 PS 3.0-15.0 (cmH2O).

The Aircurve data is showing no CAs at all, which leads me to suspect that the machine isn't recording them.  I've sent Resmed a message but haven't had a response yet. 

Can anyone shed any light on this and what I can do to get the data right?
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#2
RE: Aircurve 10 CS Pavewave showing no CAs
the CA are fixed or partly fixed. you still need to scroll through on sleepyhead, the default settings are a guide and need fine tuning. In auto mode there is normally a min and max epap, just check that it is in auto. The clinical manual is available at the top of the page.
mask fit http://www.apneaboard.com/wiki/index.php...ask_Primer
For auto-cpap, from machine data or software. You can set the min pressure 1 or 2cm below 95%. Or clinicians commonly use the maximum or 95% pressure for fixed pressure CPAP, this can also be used for min pressure.
https://aasm.org/resources/practiceparam...rating.pdf
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#3
RE: Aircurve 10 CS Pavewave showing no CAs
G'day ThrownOutTheAsylum. Welcome to Apnea Board (you'll think you're back in the asylum Smile )

The Resmed ASV machines do not differentiate the type of apnea, just referring to them all as undefined. The reason is that their CPAP and APAP machines can't treat centrals so they take a few moments to diagnose what type of apnea you're experiencing. The ASV adjusts on a breath-by-breath basis and just gets on and treats them all by adjusting the pressure support (and without bothering to determine what type of apnea it is).

If your pressure settings are anywhere in the ballpark the machine will completely eliminate centrals, though you may still experience obstructive apneas and hypopneas. If your settings are close to right you won't get any apneas at all, just a few hypopneas (which is what I see most nights).

I'd be interested to know what your AHI is with the current settings, and how you feel. Your machine is set "wide open" and you may be able to improve efficacy and comfort by narrowing down the pressure range.
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#4
RE: Aircurve 10 CS Pavewave showing no CAs
Thank you all.

So, the AirCurve 10 is likely to be recording no CAs rather than not recording CAs?

In order to consider CAs with the AirCurve 10, I  managed to find some time to load up some screenshots from SleepyHead. These are part of those I want to use for a separate thread that covers my horribly-complicated case; my words here may look as if I'm going off at half-c**k, so I'll emphasise that I'm putting them here for starters only as part of my question of whether the AirCurve 10 is likely to be recording properly:
  • The summary (screenshot-ThrownOutTheAsylum_MonthlySummary-min) broadly shows the AirCurve 10 use in July and covers 4 different set-ups: initial S9 setting, changed S9 settings that produced horrible daytime tiredness, revised S9 settings with high CAs and AirCurve 10.
  • Data from last night, Sunday 23 July 17. (screenshot-ThrownOutTheAsylum_AC10_23Jul17....)
  • Data from my AirCurve 10 use (screenshot-ThrownOutTheAsylum_AC10_.....)
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#5
RE: Aircurve 10 CS Pavewave showing no CAs
those charts are good, the only this is I'd look at the tidal volume and minute ventilation and see if there is enough min epap and PS
I'm titrating an ASV this week.
this is my tidal volume and minute vent as I adjusted it on the first night. min epap 6 min PS:3, just to see and then min epap 10 min PS:3
you can see the improved MV and TV
http://i.imgur.com/6bwo3QO.png

the next night was min epap 8 min PS:4
http://imgur.com/YGRaSjh

then
min epap 11 min PS:4
http://imgur.com/Htb59Fi

the reason to post was to show how the TV and MV can be adjusted by epap and a bit more min PS, I noticed your MV and TV is down a bit.
mask fit http://www.apneaboard.com/wiki/index.php...ask_Primer
For auto-cpap, from machine data or software. You can set the min pressure 1 or 2cm below 95%. Or clinicians commonly use the maximum or 95% pressure for fixed pressure CPAP, this can also be used for min pressure.
https://aasm.org/resources/practiceparam...rating.pdf
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#6
RE: Aircurve 10 CS Pavewave showing no CAs
Thank you. You've been a big help.
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#7
RE: Aircurve 10 CS Pavewave showing no CAs
I have just opened the clinician's manual (thank you, SuperSleeper and the board's manual service) to find the following:
"AHI and Total AI: Central sleep apnoea detection (CSAD) is not active in ASVAuto and ASV modes. The ASV algorithm eliminates central apnoeas. Therefore, any apnoeas reported by the device will be obstructive or indicative of a closed airway. "

So, the machine isn't recording CAs.
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#8
RE: Aircurve 10 CS Pavewave showing no CAs
it shows ca and oa as UA they are both counted as a period of not breathing for more than 10 seconds, but resmed claim 100% success on ca, so any UA can be assumed to be obstructive and you raise the min epap for this.

put your sd card data into sleepyhead program zoom in and look at each and every breath you breathe during the night.
mask fit http://www.apneaboard.com/wiki/index.php...ask_Primer
For auto-cpap, from machine data or software. You can set the min pressure 1 or 2cm below 95%. Or clinicians commonly use the maximum or 95% pressure for fixed pressure CPAP, this can also be used for min pressure.
https://aasm.org/resources/practiceparam...rating.pdf
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#9
RE: Aircurve 10 CS Pavewave showing no CAs
(07-26-2017, 05:34 AM)ajack Wrote: put your sd card data into sleepyhead program zoom in and look at each and every breath you breathe during the night.

and if you do not fall asleep doing so, your apnea is cured! Eat-popcorn
Dedicated to QALity sleep.
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#10
RE: Aircurve 10 CS Pavewave showing no CAs
I know what you mean, I cheat and speed through the night using the right arrow Smile
I think thrownout just wants peace of mind that the machine is doing what it is supposed to do. scanning the flow chart will give it.
mask fit http://www.apneaboard.com/wiki/index.php...ask_Primer
For auto-cpap, from machine data or software. You can set the min pressure 1 or 2cm below 95%. Or clinicians commonly use the maximum or 95% pressure for fixed pressure CPAP, this can also be used for min pressure.
https://aasm.org/resources/practiceparam...rating.pdf
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