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Resmed v Philips - Hypopneas - DeepBreathing - 10-12-2013
I've been trialling a Resmed S9 Autoset, with indifferent results, so I've now been issued a Philips Respironic Bipap ASV. After the first two nights my OSA and CSA indices have fallen to almost nothing, but the hypopnea index has jumped from around 0.6 to >7. (Hence the AHI has remained between 7 and 9).
Is this dramatic increase in HI a function of the bipap ASV treatment, or is it a case of the machines interpreting the same data differently? Looking at the graphs, it seems the Philips is more aggressive in flagging an event than the Resmed was. I use SleepyHead software, if that makes any difference.
RE: Resmed v Philips - Hypopneas - PaulaO2 - 10-12-2013
Or it could be you are having more hypopneas. Seems as though I read that somewhere as a side thing with ASV machines. That the variable pressure keeps the brain tricked to not have a central but at the cost of having more hypopneas. But don't take that as fact! I could be wrong.
RE: Resmed v Philips - Hypopneas - DocWils - 10-13-2013
The only way to reasonably determine the difference at home is to use both machines with a pulse oxymeter, and see if you get more O2 dips on the one than the other, and if they line up with the events listed in the machine readout in Sleepyhead.
Beyond that, I would seek out the opinion of your therapist.
RE: Resmed v Philips - Hypopneas - vsheline - 10-13-2013
(10-12-2013, 06:36 PM)DeepBreathing Wrote: I've been trialling a Resmed S9 Autoset, with indifferent results, so I've now been issued a Philips Respironic Bipap ASV. After the first two nights my OSA and CSA indices have fallen to almost nothing, but the hypopnea index has jumped from around 0.6 to >7. (Hence the AHI has remained between 7 and 9).
Is this dramatic increase in HI a function of the bipap ASV treatment, or is it a case of the machines interpreting the same data differently? Looking at the graphs, it seems the Philips is more aggressive in flagging an event than the Resmed was. I use SleepyHead software, if that makes any difference.
Hi DeepBreathing,
ResMed defines Hypopnea as 50% or greater decrease in air flow for ten seconds or longer
Philips Respironics defines hypopnea as a 40% reduction in flow for ten seconds or longer
But before I venture a comment, what are your machine's settings?
Max pressure [4 to 25.0]
EPAP min [4 to Max pres]
EPAP max [EPAP min to Max Pres]
PS min [0 to (Max Pres - Max EPAP)]
PS max [PS min to (Max Pres - Min EPAP)]
BPM [Off, Auto, 4 to 30]
Ti [0.5 to 3.0]
Flex type [None Bi-Flex]
Bi-Flex [1 2 3]
Rise time [0 1 2 3]
Take care,
--- Vaughn