Can someone clarify for me:
To my understanding, Apneas and Hypopneas have to meet a certain criteria. RERAs are the breathing episodes that don't meet this criteria.
My sleep study was done with a WATCHPAT-200. Which showed RDI 15 (24 in REM v 12 in nREM) and an AHI of 1.
From a physiological standpoint, is it not quite likely that RERAs are caused by the same thing as apneas/hypopneas, they just don't reach the same severity?
According to the way WATCHPAT detects: "A RERA is an arousal from sleep that follows 10 seconds or more of increased respiratory effort but does not meet the criteria for apnea or hypopnea."
Is this not likely caused by the same physiological reason, just to a lesser severity? (I.e. there is a closure in the airway much the same as 'OSA', just to a lesser extent, or the closure doesn't result in the oxygen desat.)
Surely you could have someone diagnosed with 'severe' OSA, and someone diagnosed with 'no OSA' ( and thus not be given CPAP), that actually could both virtually have the same condition, seperated by only a very minor difference? (I.e. the severe has desats that go 1% further each time, or breathing that stops for 1 second longer, rendering their score as qualifying for AHI where as the other person could have just as many events, but if you just missed that 'qualification line' for an event, it's not registered.)
What i'm assuming is, that effectively what the WATCHPAT-200 detects as RERAS is what i'm discussing above? Likely breathing/respiratory difficult that occurs for the same reason as regular OSA, but just doesn't quite meet the critiera.
Ofc some people define this as 'UARS', and then doctors claim 'UARS' can develop into 'OSA', surely this is often exactly the same thing, just not quite to the same extent (even though it could seemingly be SO borderline)?
So for me for example: I'm 26, Male, Not Overweight. I have an RDI of 15 and an AHI of 1.
Surely it's quite possible, that actually, if I were to go and put on 30lbs (don't worry, I don't plan to do this

) and thus increase my neck circumference, I could quite likely then have an RDI of 15, and an AHI of 15, because at the moment my airway isn't closing enough to meet the AHI requirement, but by putting that extra strain on my airway from the weight/neck circumference, those RERAs would not reach the severity to classify as an 'AHI' rather than just 'RERAs'.
Surely what a lot of people are calling 'UARS' is actually just 'pre-OSA'. Maybe we're all throwing UARS around incorrectly, but regardless of what you call it, surely if you show an RDI similar to that of someone with OSA, but an AHI lower, that's actually likely the same thing, just not to the same severity?