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[Diagnosis] Negative sleep study, still ordered a CPAP
#31
RE: Negative sleep study, still ordered a CPAP
The bit about your safety is bosh, but you might want to suspend CPAP use between now and the WatchPAT study. I've read conflicting opinions about whether using CPAP in the run-up to a sleep study can distort the results. So I'm offering my two cents for you just to be on the safe side.
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#32
RE: Negative sleep study, still ordered a CPAP
your flagged flow limitations are low but flagged and unflagged fl are pretty clear on the 2 zoomed screenshots (abbreviated, flat, slanted m or w shaped inhales). I doubted it earlier but second guessing myself: maybe you are particularly sensitive and suffer uars after all.
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#33
RE: Negative sleep study, still ordered a CPAP
(11-19-2020, 02:01 PM)Dormeo Wrote: The bit about your safety is bosh, but you might want to suspend CPAP use between now and the WatchPAT study. I've read conflicting opinions about whether using CPAP in the run-up to a sleep study can distort the results. So I'm offering my two cents for you just to be on the safe side.

Thank you.



(11-19-2020, 02:57 PM)sheepless Wrote: your flagged flow limitations are low but flagged and unflagged fl are pretty clear on the 2 zoomed screenshots (abbreviated, flat, slanted m or w shaped inhales). I doubted it earlier but second guessing myself: maybe you are particularly sensitive and suffer uars after all.

Are these patterns corresponding with someone with UARS? I honestly have no knowledge of UARS and don’t know what to to look for besides RERAs, but that’s what the upcoming WatchPAT is for.
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#34
RE: Negative sleep study, still ordered a CPAP
I have GERD too. Diagnosed in 2007. Fatigue started in 2015. Sleep study in 2016 showed 0 AHI. Fatigue is not always a sleep apnea issue. GRD can be a sign of bad gut health. Bad gut health can have a lot of causes. I would go to a doctor and get full thyroid panel which includes free t3 and t4. Also get a homocysteine test which will lead you to knowing if you have a mthfr gene mutation or not.
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#35
RE: Negative sleep study, still ordered a CPAP
(11-19-2020, 05:17 PM)weiss27md Wrote: I have GERD too.  Diagnosed in 2007.  Fatigue started in 2015.  Sleep study in 2016 showed 0 AHI.  Fatigue is not always a sleep apnea issue.  GRD can be a sign of bad gut health.  Bad gut health can have a lot of causes.  I would go to a doctor and get full thyroid panel which includes free t3 and t4.  Also get a homocysteine test which will lead you to knowing if you have a mthfr gene mutation or not.

I’ve had my thyroid checked, but they said nothing was out of the ordinary. GERD appeared after a nasty food poisoning. At the same time gut issues appeared. Will ask about the homocysteine test next time I meet with my GP again
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#36
RE: Negative sleep study, still ordered a CPAP
The extent to which you are affected by inspiratory flow limitation is very under-stated by the statistics from your therapy.  You highlighted two segments of sleep which were apparent on the whole night flow chart as periods with uneven respiratory flow, with spikes of inspiration and expiration suggesting arousals.  The closeup of period at 02:00 shows increasing flow limitation from 02:02:10 to 02:04, which terminates in a change in respiratory flow rate and resumption of a more normal flow by 04:04:30.  This is practically the definition of RERA (respiratory effort related arousal), and when this is repeated through the night is very disruptive to sleep.

Similarly, the period from 03:59:00 to 04:02:00 again shows a transition to increasing flow limitation becoming acute near the end and followed by an obvious arousal and restoration of normal flow.  This is not only a RERA but I'm surprised not to see a hypopnea flagged here.  We can only speculate on why your airway becomes less patent over these two examples, but there is a clear progression form near normal flow to serious flow limitation over a 2-minute period, ending in arousal.  High on the list of suspects is your sleep position, where your chin sags toward your chest obstructing flow, resulting in an arousal and change in body position.  The collar may help with this.

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Sleeprider
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