(01-02-2013, 08:02 AM)iSnooze Wrote: Can someone tell me why according to the graph below it appears that I had an AHI for almost 2 hours, and then 2 more for about 45 minutes each?
The duration on the AHI graph is actually how many apnea's you had per hour, in this case it's 3 apnea's over about a 6 hour timeframe, that gives you an AHI of about 0.5, or one apnea every two hours approximately, but AHI is the average number apnea events per hour for how ever long your sleep session lasted, in this case close to 6 hours.
On the log graph, after an apnea occurrs, it waits for somewhere close to an hour before it falls back down to 0, if you had another event within the same one hour timeframe the line jumps up to 2 or 3 etc., indicating how many apnea's you had during the same one hour timeframe since the first apnea occurred, since none of your events happened within the approximately one hour timeframe of each other, the green line drops back down to 0 until the next apnea event occurs.
The actual time duration of each apnea type is listed in SleepyHead in the "Events" tab, just expand the type of event and in the expanded view it shows the timestamp where each event occurred and the duration of the apnea in parenthesis, if you click on one of the event times it will show the Flow Rate graph in a zoomed-in view so you can see what the event looked like to the machine as far as your breathing pattern was concerned.
Does that even make sense?