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home test for centrals?
#1
home test for centrals?
Is there a home test I can take for centals? I didn't like the sleep lap I went to because they were very noisy and could not sleep.
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#2
RE: home test for centrals?
Not that I am aware of.  To fully diagnose Centrals you need the EEG to pick up your brain waves.
Sleep labs do this both with and without CPAP

That said your autoset should give an adequate representation.  Obviously this is under CPAP pressure.

What are you trying to accomplish?
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#3
RE: home test for centrals?
(10-29-2018, 10:45 AM)jerry1967 Wrote: Is there a home test I can take for centals? I didn't like the sleep lap I went to because they were very noisy and could not sleep.

Yes, a basic 4+ channel Type III home sleep test can differentiate between obstructive apneas and central apneas. To do this, the sleep test uses a nasal cannula flow sensor to detect when you aren't breathing - which is the case with both central and obstructive apneas. The test will typically also use 1 or 2 "effort bands" that go around your chest and abdomen to detect whether you are expanding them to inhale. If you exhibit respiratory effort but aren't inhaling air for 10 seconds or more, then that can be scored as obstructive apnea - you are trying to breath in but can't because your airway is obstructed. If you do not exhibit respiratory effort when you stop breathing for 10 seconds or more that shows your body isn't trying to breathe and the apnea can be classified as a central apnea rather than obstructive.

A home test that does not include at least one effort band usually cannot distinguish between obstructive and central apneas. One exception to this is the wrist worn WatchPAT Central PLUS with finger sensor and chest worn accelerometer sensor which can distinguish between obstructive apneas and central apneas, but does not use a nasal cannula or effort bands. It uses a special method of detecting "Peripheral Arterial Tone" from the finger sensor and can infer obstructive apnea, central apnea and respiratory disturbance from that data.

An EEG is not required to distinguish the difference between obstructive apnea and central apneas. The EEG is used to score your sleep stages. Neither obstructive or central events count as sleep apnea (towards your AHI) unless you are asleep. But there could be data in the EEG related to central apnea scoring that I'm unfamiliar with.
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