(11-11-2014 04:53 PM)lvillanueva5 Wrote: I have an AHI of 1.5 and an RDI of 18.5 and my doctor has diagnosed me with moderate OSA for which I am now on a CPAP. All the information that I've been reading focuses on the AHI and that if it's below 5, it's normal.
Do cpap machines keep track of RDIs? Is that something that will transmit to sleepyhead? (I've been reading the forum post on it.)
I guess, am I really suffering from moderate OSA if my AHI is normal. I'm not 100% happy with the doctor that I'm seeing and I'm worried that maybe he is pushing the CPAP therapy on me when it doesn't need to be.
RDI is a better criterion than AHI to use to diagnose obstructive sleep apnea. Here is an article from the American Association of Sleep Medicine which on page 267 uses RDI rather than AHI to define the ranges for severity of Obstructive Sleep Apnea. Mild OSA is RDI 5 to 15, Moderate OSA is RDI 15 to 30, Severe OSA is RDI 30 and above:
In Table 2 of this article from Mayo Clinic Proceedings Jun 2011, it is explained that people with UARS are now given a diagnosis of Obstructive Sleep Apnea:
The RERA detection algorithm used by Philips Respironics is described in brief by robysue in the post linked below (in the section near the beginning labeled "Other flagged events"). Personally, I think the Philips Respironics RERA detection criteria would be likely to score (count) only a minority of the total number of RERA events which are occurring, and I think it is not as likely to be fooled into falsely counting a RERA as having occurred when actually one had not occurred, so I think the number of RERA events reported would tend to underestimate the true number of RERA events.