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OA on Inhale or Exhale?
#11
RE: OA on Inhale or Exhale?
Or is this how I should be reading an exhale?

https://imgur.com/9jL7Jh0
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#12
RE: OA on Inhale or Exhale?
fakename, The start of exhale is the top of the curve going down. The end of exhale is at the bottom than there's a slight pause and inhale starts and goes back up the curve.
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#13
RE: OA on Inhale or Exhale?
Let's talk about this chart and show you how to make it better.  First, go the left margin of the flow rate chart and right-click your mouse, then select Dotted Lines.  Select the Zero line.  This will draw a horizontal line across this graph at the 0.00 mark.  This is the zero flow line where inhale and exhale begins.  Everything below the line is exhale, everything above the line is inhale.  Where your respiration flow rate crosses over is actually the zero-flow or transition point.  

Where you have drawn the blue line moves from the peak flow of expiration to the peak flow of inspiration.  The inspiratory flow begins at 0.00 an increases in flow quicky to about 80 mL/sec, then drops back to 0.00, at which point you begin expiration.  In this case we see you begin a good expiratory flow, and it has a quick return to zero flow, followed by more expiration.  This may be a swallow mid-way through your exhale.  The beginning of the OA has a brief, incomplete inspiration and the airway shuts off.  The bumps in the flow are pressure pulses from your machine, and the apnea ends after 15 seconds with an inspiration and another double expiration. This OA began at the transition from exhale to inhale (inspiratory obstruction), and ended when you finally took a breath in after 15 seconds. Pretty typical.

[Image: yCbT1TS.jpg]
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#14
RE: OA on Inhale or Exhale?
Thanks for correcting that! That one small lesson just answered many questions I've had about reading the flow chart!
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Advisory Members serve as an "Advisory Committee" to help shape Apnea Board's rules & policies.

Membership in the Advisory Members group does not imply medical expertise or qualification for advising Sleep Apnea patients concerning their treatment.



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#15
RE: OA on Inhale or Exhale?
Sleeprider, thank you. What is the sequence of events leading up to my taking the next normal breath? Do I wake up?
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#16
RE: OA on Inhale or Exhale?
You aren't normally aware, you can arouse/wake during an OA and you regain control of your throat for a bit, breathe better till the next event. as was said, above the zero line is breathing in, below is breathing out. 

this explains it well
https://www.youtube.com/watch?v=-gie2dhqP2c&t=603s
[video]v=-gie2dhqP2c&t=603s[/video]
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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#17
RE: OA on Inhale or Exhale?
Your sleep stage or waking state cannot be determined from the flow rate data. There are some characteristics of respiration during sleep and arousal, but insufficient data in that short clip. Glad the explanation helped.
Sleeprider
Apnea Board Moderator
www.ApneaBoard.com

____________________________________________
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Soft Cervical Collar
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Organize your OSCAR Charts
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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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