My name is Heather, and I've just completed a sleep study for apnea. I have not yet been contacted by my doctor to discuss the results of the test, but the technician shared some information with me from the report. I was wondering if I could get a little help understanding this information, it would be greatly appreciated as I was not able to do much research prior to the study ... a doctor's visit for fatigue resulted in a sleep study the following night.
Here are some of the results I was given:
The sleep efficiency was 70.7% and normal sleep onset time of 25 minutes. REM sleep latency, 172 minutes, was normal.
The overall respiratory disturbance index (RDI) was 20.4 per hour, RDI during rem sleep was 22 per hour. The Apea-Hypopnea index (AHI) was 18. There were 110 total events with 15 obstructive apneas, 8 mixed apneas, 32 central apneas, 42 hypopneas, 13 RERAs. Mean duration of events was 11.8 seconds, with a maximum of 23.5. The baseline oxygen saturation was 96%; the minimum during the study was 87%. Prolonged cardiac rhythm monitoring was unremarkable.
Diagnosis: Moderate obstructive sleep apnea syndrome with mild oxygen desaturations.
There are other stats I can provide if needed.
My questions are as follows:
I was diagnosed with obstructive sleep apnea, although it seems as though I had more central apneas than obstructive. Can someone explain this, and should I be concerned about the central apneas (in my very brief readings on the topic before the study, I seem to recall reading that central apneas can be related to other health problems?). Although I have not seen the report from the second night with the CPAP machine, the technician did tell me that there were no apnea events with the pressure at 9.
What does "baseline oxygen saturation" mean? Is that an average?
What is an RERA index?
And finally, could someone please explain these stats?
Average SaO2 during REM: 96
Average SaO2 during NREM: 96
<90% <80% <70% <60%
Minutes of sleep w/SaO2, REM .1 0 0 0
Minutes of sleep w/SaO2, NREM . 3 0 0 0
Thanks in advance for any help you can provide!