djams wrote: ↑Sun Oct 14, 2018 3:42 pm
What are the pressure pulse overlays on the flow chart?
I notice they're really dense at 23:10, and maybe the flow rate looks choppy over the dense area. Maybe this is where SH is making a mistake?
Pressure pulses on the Respironics machines are nothing more than the machine sending a little puff of pressure/air to help it decide if any flow reduction it is sensing is obstructive in nature or central (clear airway) in nature. Pressure pulses may or may not end up with a flag. All depends on if the whatever reduction meets the other criteria to earn a flag.
The 23:10 stuff...it's so close to a known awake time that I would really suspect that he was still awake and the awake breathing was confusing the machine. The weird looking flow rate at the time of the large leak...really had to say much about it at this scale but the flagged large leak at that time wasn't horribly high...so I wonder if it was really a large leak. If he was in large leak territory he was barely in there and certainly not deep enough under normal circumstances to really affect the recording by the machine.
With SH not flagging the hyponeas that the machine obviously flagged...I can't help but question everything else that SH is showing.
In other words I wouldn't do much worrying about this one night. I would like to see an Encore Pro detailed report to see what it shows more out of curiosity than anything else.
At this point if this were my report there's really not much that I would do except try to work on leaks (which we do all the time anyway) and see what the next night shows.
If SleepyHead still doesn't match up with the machine's data (I am more concerned with machine than DreamMapper) then additional detective work is definitely needed.
SleepyHead doesn't do the flagging...it's the machine that does the flagging and if the machine flags something then SH is supposed to show it. The fact that SH doesn't show the truckload of hyponeas can't help me wonder what else about this night isn't reported accurately.
I may have to RISE but I refuse to SHINE.
