Previously I've compared Zeo data with pulse oximetry and saw a good correlation.
The ZEO detects REM really well in a family member who has a known REM related hypoventilation issue, the oxygen desaturations, increase in heart rate and peaks of CO2 on the graph below correspond well to periods of REM detected by ZEO… (In the graph, the CO2 is high to begin with as I was titrating the BiPAP to bring it down, but once it was down, the oxygen desaturations were still there, although nowhere near as bad as before. In subsequent titrations they were eliminated, but this graph shows the REM correlation quite well).
http://blog.myzeo.com/forum/as.....ion/#p1170 After titrating BiPAP to virtually eliminate oxygen desaturations due to hypopneas, the transcutaneous CO2 trend shows another good correlation with Zeo's reporting of both REM and wake.
At first I doubted the awakenings reported by Zeo, but they tie in really well with drops in CO2 in the second half of the night, which suggests more efficient breathing during the periods of wake – despite the fact that the awakenings were not remembered. (The first half should be discounted due to other variations in the ventilator settings and sleep position).