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What does machine class as apnoea event? [Ockrockets Thread]
#11
RE: What does machine class as apnoea event?
(05-13-2020, 10:08 AM)multicast Wrote: Thanks for your answer despite it didn't address my problem directly maybe because I didn't described it correctly enough -- sorry, I'm not a native speaker of your language.  Here's what I was confused about: I think I had a wrong notion of what "flow limitation" is, namely that if an OA occurs there must be "no flow" because of the obstruction.  That was wrong.

Here's what I've found out.  An apnea is defined as a reduction in ventilation below a certain percentage of recent breathing for at least 10 seconds.  Now this apnea may be obstructive or central.  To classify the event, ResMed machines use a force oscillation technique to examine if the airway is closed or not.  In that sense the detection of apnea is something "short-timed", momentarily.

Now "flow limitation" is "long-timed based" in contrast, calculated by some indices as flatness, breath shape, ventilation change and breath duty cycle calculated in the time of three to five minutes.

From here there is no contradiction that the flow limitation is zero when OA occurs.

Mike


Thanks for taking over MY thread.. 
I won't bother asking anymore on MY query, or post any of MY screenshots.
Dodgy
- They are not spelling/grammar errors.. I live in Australia, we do it differently Down Under  Big Grin -
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#12
RE: What does machine class as apnoea event?
Good day Mate...

Sleep wake junk, or better wake arousal... but as another said you need 10 seconds for a legitimate event. I noticed you did mention you checked your event, however, you can expand the flow rate chart to see if the events, Obstructive or Central Apneas are ones or not. The graph will flat line....

The machine is sensitive and will flag wake/arousals as an event .. Just as the VS2 (snore) will pick up vibes so I was told to disable it, so checking the flow rate flat lines are important.

It be nice to see a screenshot of you Sleeyhead results..... in the mean time... stay safe and what does down under really mean?
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#13
RE: What does machine class as apnoea event?
(05-17-2020, 07:04 AM)milboltnut Wrote: Good day Mate...

                         Sleep wake junk, or better wake arousal... but as another said you need 10 seconds for a legitimate event. I noticed you did mention you checked your event, however, you can expand the flow rate chart to see if the events, Obstructive  or Central Apneas are ones or not. The graph will flat line....

The machine is sensitive and will flag wake/arousals as an event .. Just as the VS2 (snore) will pick up vibes so I was told to disable it, so checking the flow rate flat lines are important.

It be nice to see a screenshot of you Sleeyhead results..... in the mean time... stay safe and what does down under really mean?

So are you talking to me or to the person who hijacked my thread? (Multicast)
- They are not spelling/grammar errors.. I live in Australia, we do it differently Down Under  Big Grin -
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#14
RE: What does machine class as apnoea event? [Ockrockets Thread]
Ockrocket, I split out multicasts posts into his own thread, and sent him a PM.
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INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE.  ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA.  INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
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#15
RE: What does machine class as apnoea event? [Ockrockets Thread]
(05-20-2020, 07:02 AM)OpalRose Wrote: Ockrocket, I split out multicasts posts into his own thread, and sent him a PM.

Thank you Rose,

I have responded to the PM you also sent to me, and as mentioned in that, I'm trying to find a common denominator in external factors before I post Oscar screenshots so that there can an overall picture for it.

It will also be easier for multicast to get his own query accurately addressed by having a separate thread. Thumbs-up-2

Regards, 
Ock.
- They are not spelling/grammar errors.. I live in Australia, we do it differently Down Under  Big Grin -
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#16
RE: What does machine class as apnoea event? [Ockrockets Thread]
Ockrocket, I suspect the increase in events you are seeing is mostly hypopnea. The Philips machine can register hypopnea events for merely a reduction in flow rate and is more prone to registering H events than the Resmed due to a lower threshold for flow reduction. Having significant variations in respiratory flow rate as you drowse in bed is a reasonably expected phenomenon. If you look at the specific event type that increased, I think you will find that it is hypopnea, although some people will have CA events due to irregular awake breathing with pauses of 10 seconds or more. It's not unusual.
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INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
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#17
RE: What does machine class as apnoea event? [Ockrockets Thread]
(05-20-2020, 08:35 AM)Sleeprider Wrote: Ockrocket, I suspect the increase in events you are seeing is mostly hypopnea. The Philips machine can register hypopnea events for merely a reduction in flow rate and is more prone to registering H events than the Resmed due to a lower threshold for flow reduction.  Having significant variations in respiratory flow rate as you drowse in bed is a reasonably expected phenomenon. If you look at the specific event type that increased, I think you will find that it is hypopnea, although some people will have CA events due to irregular awake breathing with pauses of 10 seconds or more.  It's not unusual.

Now that I've had the chance, I have downloaded my latest data this morning, and will post assorted screenshots for comparison between high and low nights. 

I have tried switching over to APAP and also changed the minimum and maximum settings to try to find a base line to work out settings.

My specialist didn't notice I had upped my fixed pressure from 7.5 to 8.0 when he signed off on my last clearance to maintain my professional driver status on my licence, but I'm certain he will notice if I change from CPAP to APAP on my next annual compliance check.

I am still currently well within what is considered "managed" by the RMS [ the State Government department that control motor vehicle licences and vehicle registrations in NSW Australia.]
But my AHI is progressively creeping up, and I would ideally like to hold it at a maximum of 2.0 or less per night. [ 4 is the point where I lose my driver's licence, unless I totally drop my professional endorsements and close my hire car business and just hold a private licence. I can't afford to retire, and at almost 66 years old no one wants to employ me, so my own business has been my only option.]

From my perusal of my charts this morning I'm not finding an obvious correlation to the highs.. hours of sleep - time of sleep - settings for pressures - alcohol/non alcohol beforehand - food types - all seem to have no specific consistency with the AHI numbers.

Attached is an overall summary of the machine settings and statistics.. I will try to take screenshots of comparable high/low nights and post them as pairs for comparison in following posts.

I look forward to hearing opinions from others once I have posted enough screenshots for review. Coffee


Attached Files Thumbnail(s)
   
- They are not spelling/grammar errors.. I live in Australia, we do it differently Down Under  Big Grin -
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#18
RE: What does machine class as apnoea event? [Ockrockets Thread]
Hammer

I need a *headbang* emoticon.. 

I can't screenshot a full chart [tried F12 and can't find where that screenshot even went to on my laptop  Dont-know ] my snip screenshot tool won't let me scroll down the screen to get the whole chart in the shot. 

I seem to recall with Sleepyhead there was certain lines to close in the chart before taking a screenshot.. does it work in Oscar and what lines are the ones I need to keep for best assessment of my data?
- They are not spelling/grammar errors.. I live in Australia, we do it differently Down Under  Big Grin -
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#19
RE: What does machine class as apnoea event? [Ockrockets Thread]
(05-21-2020, 01:25 AM)Ockrocket Wrote: Hammer

I need a *headbang* emoticon.. 

I can't screenshot a full chart [tried F12 and can't find where that screenshot even went to on my laptop  Dont-know ] my snip screenshot tool won't let me scroll down the screen to get the whole chart in the shot. 

I seem to recall with Sleepyhead there was certain lines to close in the chart before taking a screenshot.. does it work in Oscar and what lines are the ones I need to keep for best assessment of my data?

Okay, a quick search found I'm not the only one who has lost a screenshot done with the F12 key. Grin

Found the missing screenshot, but before I do more for pairings.. what lines do I need to keep in place for data assessment?


Attached Files Thumbnail(s)
   
- They are not spelling/grammar errors.. I live in Australia, we do it differently Down Under  Big Grin -
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#20
RE: What does machine class as apnoea event? [Ockrockets Thread]
With OSCAR 1.1.x go to view/reset charts /standard.
Events
Flow rate
Flow Limits (ResMed only)
Pressure
Leaks
Snore

F12 removes calendar, removes pie chart and right sidbar, takes screenshot, then restores
Fred Bonjour - Project Manager and Lead Tester for OSCAR - Open Source CPAP Analysis Reporter 
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INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
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