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What is a respiratory arousal?

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What is a respiratory arousal?

Postby nitro71 » Mon Mar 30, 2009 9:10 pm

I just read through my sleep study and it has a lot of big words in it! Try to figure out what a respiratory arrousal is?
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Postby sypark » Mon Mar 30, 2009 10:16 pm

A respiratory arousal is any event on a sleep study where you obstruct partially or fully, and wake up (your brain waves light up showing that you went from sleep to awake), and this can occur after an apnea, hypopnea, or a RERA. A RERA (respiratory event related arousal) is an arousal associated with partial resistance to inspiratory breathing, but not enough to be called an apnea or hypopnea. Some centers calculate an RDI (respiratory disturbance index) which includes RERAs along with apneas and hypopneas. This is different from a standard arousal, where you have at least a 3 seconds upward shift in frequencies proceeded by at least 10 continuous seconds of another sleep stage.

What was your AHI, RDI, RERA, and arousal index?
Steven Y. Park, M.D.
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Thanks for clearing that up!

Postby buddmar » Mon Mar 30, 2009 10:38 pm

Oh! Thank you for explaining that to us! I also was wondering what these "arousals" were! I thought, rather naively, that they were measuring ... er ... ahem ... something that, uh, happens to us guys when we sleep! :oops:
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Postby sypark » Mon Mar 30, 2009 10:45 pm

You're right—it's not that kind of "arousal." Nocturnal penile tumescence testing is an additional test that's done along with the sleep study, usually to test for "organic" vs. psychogenic reasons for impotence. A collar is placed around the penis and during REM sleep, when erections usually occur, the pressure due to increased blood flow can be measured.
Steven Y. Park, M.D.
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Postby nitro71 » Tue Mar 31, 2009 12:41 am

AHI 20, RDI 28, doesn't look like they scored RERA, doesn't look like they scored the arousal index. They have those numbers but no score for them. I don't really know what all the numbers mean but the respiratory arrousal sounds like it would mess up your sleep.

85% sleep effieciency! Hopefully I'm getting more efficient with CPAP.
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