What exactly does this mean?
Sa02 was 92.0% and the minimum Sa02 during NREM was 81.0% and during REM was 83.0%. The number of oxygen desaturations:;= 3%
was 216 for a desaturation index of 89.7. The patient spent 24.5 % ofNREM sleep with oxygen saturation levels below 90%, and 50.2
% of REM sleep with oxygen saturation levels below 90%.
What is the desaturation index ?