Part III - Sleep Study Results – Detail
For those of you like numbers, like me, here’s the detail from the study with some comments by me:
Split study, with 115 minutes without CPAP and 259 minutes with CPAP (adjusted from level 5 to level 9).
Sleep Stages (without CPAP, with CPAP, normal)
N1: 4.9%, 4.4%, 5%
N2: 48%, 44.2%, 50%
N3: 47.1%, 12.5%, 20%
REM: 0%, 38.9%, 25%
Looks to me like most of the problem was excessive time in deep sleep stage (N3) and no REM sleep, and the CPAP was able to reduce time in both N2 and N3 stages and increased time in REM stage.
Other Indexes (without CPAP, with CPAP):
Apneas: 31, 0
Hypoapneas: 38, 19
Max Duration (secs): 36, 28.5
Avg Duration (secs): 20, 19
RERAs: 0, 0
AHI: 37, 4.5
RDI (= AHI + RERAs + Snoring): 73.07, 4.52
Sleep Efficiency: 97.8, 97.3
Snoring with EEG Arousal (per hr): 36.3, 0
PLMS arousal (per hr): 1.6, .2
Desat per hr: 16, .2
- Severe sleep apnea
- Severe respiratory related sleep fragmentation
- Loud non-positional snoring
- No EKG abnormalities
- No clinically significant PLMS
- No Bruxism
- No Cheyne Stokes Breathing
Body Position (supine, left)
Minutes: 77%, 23%
OA: 31, 0
Hypoapneas: 27, 2
AHI (#/hr)” 37.4, 0
RDI: 70, 7.6 (90%, 10%)
RERA: 0, 0
All the Apnea and Hypoapnea trouble is sleeping Supine. But what this is missing is how much snoring happens when he is Supine, vs. on his side. The snoring should have been classified as RERAs, but were instead added into the RDI as “Snoring”, and then it doesn’t appear in this group of stats. Looking at the graph, the snoring is just as bad if not worse when he is on his side. So, it seems to me, if he sleeps on his side all the time like he says (which who knows whether or not is true), all of his sleep disturbance is caused by snoring, not apneas and hypoapneas. So if there is a way to cure the snoring plus encourage him to sleep on his side, he’d be fine. Say for example, his snoring is caused by a severely deviated septum that can be repaired. UGH, but can’t seem to catch a DRs attention enough yet to go through this logic (more in later post).
Oximetry:
Avg O2 (awake, nrem, rem, min): 95%, 96%, NA, 88%
Desat Index: 16
Desat Max: 46
Remarkably good Oximetry numbers, given the high RDI?