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Tangent to AHI and perception of how I feel, what is the daytime test?
tangent to topic. It would be interesting to wear your cpap for a while during the day while you read or watched tv and check if you really have no ahis. Has anyone ever done this kind of crazy experiment (all night is enough for most of us) LOL!
Also, what do they call the test they do during the day to catch you napping? Do they hook you up to anything or just watch if you fall asleep, and continue to fall asleep after they keep waking you up?
I wore my cpap during a two hour nap yesterday and out of curosity checked my numbers, they were terrible, but this morning when I checked them again (they would have contained the two hour nap), they had really come down a lot. I thought this was interesing. My night was pretty good in spite the two hour slot of terrible numbers. I feel pretty good even with and AI that never gets under 5 (still titrating, 18/22), though I still have to take Nuvigil.
Would appreciate anyone's insight into the daytime study.
Thanks, Mary Z.
<cite>sleepxrxrxrx said:</cite><blockquote cite="
http://www.sleepguide.com/forum/topics/changes-in-ahi-and-perceptio..."><div> Also, consider that if you are awake and breathing normally the whole night, your machine would read AHI=0 --though you got no sleep at all.<BR>The standard of 5x/hour is just an arbitrary cutoff to account for variations in analysis, that would indicate PAP therapy may be an effective treatment modality. It doesn't have a static value for qualitative pathology from patient to patient.<BR>You might check your humdifier for over humidification in the Florida environment. excess condensation can reduce the flow of therapy,</div></blockquote>
Views: 24
Replies to This Discussion
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Permalink Reply by RockRpsgt on
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The daytime study is call an MSLT. This test is designed to test for narcolepsy and other disorders that cause Excessive Daytime Sleepiness (EDS).
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Permalink Reply by Mike on
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Mary, when you say this: "It would be interesting to wear your cpap for a while during the day while you read or watched tv and check if you really have no ahis"
Are you interested in this to test whether our machines really give accurate results? Or is it something else on your mind?
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Permalink Reply by sleepycarol on
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I have wondered if it would help to wear it when experiencing shortness of breath. I know when the humidity it high I have trouble with shortness of breath and asthma.
Of course I am fully aware that it isn't the purpose of the machine, but hey just a thought.
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Permalink Reply by Judy on
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MSLT = Multiple Sleep Latency Test. As I remember it you wear all the paraphenalia you do for a night time PSG, but every 2 hours they make you take a 20 minute nap. Whether awake or asleep they see to it that you get up at the end of 20 minutes for another 2 hours before having you lay down for another 20 minute nap.
They are best done after a full night's PSG. They usually start the MSLT after waking you at 6 AM and have you start the first MSLT nap at 8 AM.
My AHI was always higher when I was awake, for instance watching TV, and then reduced when I finally lay down and went to sleep. I've not tried that in a long time nor have I ever just sat up during the day wearing it. I'm not much into TV so the only time I've watched TV in bed is for one of the late evening football games on a night I am really, really tired as midnight or close is my usual bedtime.
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Permalink Reply by Mary Z on
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Mike, just curious if we stop breathing some times during the day, or say only take 10 breaths a minute. I'm not checking on the accuracy of the machine. Just curious. Guess I'll have to check it out. LOL!
Mary Z.
Mike said:Mary, when you say this: "It would be interesting to wear your cpap for a while during the day while you read or watched tv and check if you really have no ahis"
Are you interested in this to test whether our machines really give accurate results? Or is it something else on your mind?
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Thanks, Rock, Mike, Judy and sleepycarol, that's exactly what I wanted to know.
Judy, that's real interesting about your AHI being higher when you were awake during the MSLT. Did they have an explanation for that, or is it just what it was.
Thanks again,
Mary Z.
>My AHI was always higher when I was awake, for instance watching TV, and then reduced when I finally lay down and went to sleep. I've not tried that in a long time nor have I ever just sat up during the day wearing it. I'm not much into TV so the only time I've watched TV in bed is for one of the late evening football games on a night I am really, really tired as midnight or close is my usual bedtime.
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I think that sleepx was talking about what we would call "perfect breathing". Which does not exist. Central apnea would be the diagnosis given by the new CPAP machines if worn during the day. The machine would record our natural breathing pauses as centrals. The older machines would record them as obstructive apneas. This is one of the hurdles the manufacturers have had with the auto algorythm. These machines will score stage wake non-events as sleep related breathing events.
Judy you were pretty spot on about the MSLT. No respiratory equipment though. Only EEG, EOG, EMG and EKG. Basically head, chin, and eyes+ 2 ekg patches. A psg should be done prior to an MSLT to rule out anything that might effect daytime fatigue such as apnea. The pt should be allowed to wake up on their own rather than by the tech. Interrupting a sleep cycle could effect daytime fatigue. The first nap begins 1.5 to 3 hours after waking up. Usually 2 hours after. At this time the pt is given 20 minutes to fall asleep. If sleep ocurrs than the pt is given 15 minutes to see how deep of sleep they can achieve. If sleep does not happen after 20 minutes the nap is ended. This is repeated every 2 hours 4-5 times throughout the day.
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Bpaps are used to help pts breath in the hospital Carol.
sleepycarol said:I have wondered if it would help to wear it when experiencing shortness of breath. I know when the humidity it high I have trouble with shortness of breath and asthma.
Of course I am fully aware that it isn't the purpose of the machine, but hey just a thought.
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I'm sorry. I didn't mean to mislead you. I wasn't talking about wearing the mask awake watching TV during the MSLT. I meant just at home at night. If I'm upright or propped up enough to see the TV and awake my AHI is much higher than when actually laying down and sleeping. Some of that just might be the position of the head and neck whilst propped up to see the TV vs laying down flat on your pillow.
We don't breathe the same when awake and when asleep. Our breathing slows and deepens as we sleep and the deeper we get into sleep.
Mary Z said:Thanks, Rock, Mike, Judy and sleepycarol, that's exactly what I wanted to know.
Judy, that's real interesting about your AHI being higher when you were awake during the MSLT. Did they have an explanation for that, or is it just what it was.
Thanks again,
Mary Z.
>My AHI was always higher when I was awake, for instance watching TV, and then reduced when I finally lay down and went to sleep. I've not tried that in a long time nor have I ever just sat up during the day wearing it. I'm not much into TV so the only time I've watched TV in bed is for one of the late evening football games on a night I am really, really tired as midnight or close is my usual bedtime.
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