09-15-2016, 02:38 PM
(This post was last modified: 09-15-2016, 02:58 PM by Lanco.)
I see you live in Australia and that prices there are very high. I am aware of a number of people from Australia that have purchased their equipment from dealers on the US suppliers list on this site at huge savings. I would check that out.
The 90th percentile pressure is the pressure that is equaled or exceeded 90% of the time; it is also the pressure that the CPAP stays at or below 90% of the time. Percentile is a common statistical term and it has more to do with frequency (time at pressure), than as a comparison to the maximum (0.9*Pmax).
When titrating for CPAP using an auto machine, the general recommendation is to use the 90th percentile pressure for constant CPAP pressure. What this means is that a pressure less than the maximum pressure is usually therapeutically sufficient and more comfortable for the user. I would expect the 90th percentile pressure to deliver comparable therapy to what the APAP delivered. Some people find fluctuating pressure to be disruptive, and those people tend to benefit from CPAP pressure. Others are sensitive to higher pressure and prefer to spend more time at a lower pressure and let the machine increase pressure only when needed. By setting a machine at the 90 percentile pressure, you will spend much more time at a higher pressure than using APAP; 90% more time. However you will not see the highest pressure the APAP would deliver 10% of the time. The trade-off is, the pressure is constant through the night and should become unnoticeable.
Thank you Sleeprider. Very good answer that I can understand.
09-15-2016, 04:07 PM
(This post was last modified: 09-15-2016, 04:08 PM by FrankNichols.)
Also, I might add that unless the pressure changes are bothering you there is no compelling reason to switch to CPAP. And if the pressure changes are bothering you, you might want to try a smaller range first to see it that is tolerable before switching to CPAP.
EDIT: Well, that wasn't completely true, according to my sleep doctor there are some medical conditions that could indicate that CPAP would be preferable to APAP.
I am not a Medical professional and I don't play one on the internet.
Started CPAP Therapy April 5, 2016
I'd Rather Be Sleeping
Actually my main objective right now is to see how I should set my other cpap should I need to use it. But at the same time see if I like it better or have better results.
I admit I have some nights that I seem to wake up half the night but don't know if that has got to do with the changing pressures or if it's something none related but either way I need to try to narrow it down I'm thinking.
Also I though the changing pressure of the apap was suppossed to be good and give optimal therapy. If I change the pressures on the apap as suggested, Frank, or if I use the constant pressure cpap I'm thinking I may not get optimal therapy, but then again maybe it would help. Guess we don't know until I experiment with it some more.