CyrusManz

I just posted an example of how resmed fails to report clear events, by showing flow rate stationary for over 12 seconds despite a breath provided by the machine, yet resmed doesn't register these events, of which there many many through the night. I guess I have to wait for the image to be moderated now.

So this is an example of how Resmed fails to register Apnea events. The graph is a slice of about 12 seconds as seen on the time stamp.

"Flow Rate" graph clearly shows no movement in the flow (no air in or out of the upper airway, even though the upper airway is wide open) for over 10 seconds. According to protocol, no flow change over 10 seconds should be recognized as an apnea event, a cessation of breathing or "Clear Airway"...or "Central Apnea event", yet Resmed registers no event whatsoever. In fact that night I had at least 80 (eighty) or so of such events however Resmed only registered ONE:-)

Resmed algorithm appears to have been designed to ignore all events that last less than 15 seconds but international apnea protocol is clear: "A cessation of breathing, lasting up to TEN seconds, is an Apnea event"

LOL:-) Yes, it (Resmed) is "designed to make apnea disappear", by NOT reporting the events:-)

It seems that way. I think it is primarily because online forums have been littered with DME's and other parties who have an interest in Resmed products and since Philips Respironics are currently on recall, these operatives use the opportunity to flog as many Resmed machines as they can with dubious and favourable claims. Fact is however that if you do not use a Ozone cleaner to sanitize your machine, you have very little to no worries about the "foam" related recall. In fact I have used this opportunity to purchase brand new Dreamstations online and massively discounted prices, for spare and just in case they decide to discontinue this very awesome product line.

Thanks. I give it a go.

I'm not sure how Philips Respironics APAPS work because I am on a ASV machine. ASV machines are more akin to Ventilators than they are to PAP machines because they provide a close to spontaneous breath when you miss one while they also they provide auto EPAP pressures to minimize patency in OSA events. CSA events are essentially Clear Airway events that last more than 10 seconds, in which case a ASV algo should deliver successive and elevating IPAP pressures for the preset length of time, based on your Inspiration time. (Resemd has no alternate manual settings for any of this while Dreamstation algo allows you a fiully auto setup or manual setup).

I have no issues with my dreamstation. It is set to the max range of IPAP and EPAP and Pressure support. So when I am awake I can barely even feel it (which is what it should be like) and when I fall asleep it just automatically adjusts the pressures for each breath and I never ever feel it or get bothered by it.

In contrast my Resmed does some crazy things, like just adjusting the pressure up and up for no apparent reason and when I asked Resemed support how to fix it, they suggested that I "keep blowing back hard into the tube", which I thought was pretty stupid.

Resmed algo just looks at the last 90 seconds of my breathing pattern and sets up its backup based on that 90 seconds. It does not even have a manual backup rate setting. What this means is that if someone is seriously sick and their breathing pattern is all over the place, Resmed algorithm doesn't care and takes that pattern as its baseline:-)...So good luck if you average like 6 breaths per minute because Resemd ain't gonna give you more than that, if you stop breathing:-)

My 30 day AHI averages 4.5 on Respironics where as on resmed my AHI averages only 0.6. Is Resmed providing a 12 fold better therapy? It is highly doubtful.

I have severe Central Apnea disorder (>52) with less than a 10% Obstructive Apnea and I am very interested in studying my condition. For this purpose I analyze my sleep data using various software. OSCAR cpap analyzer is my choice however.

Since my therapy is with Adaptive Servo Ventilation (ASV) type of machines, I have bought both, a Respironics Dreamstation ASV and a Resmed Aircurve 10 ASV machine. Since ASV therapy monitors my respiration on a breath by breath basis, when I monitor the data I have a very detailed set to look at, like flow rate, mask pressure, tidal volume,minute ventilation and so on, on a breath by breath basis. So when I compare graphs between resmed data and Respironics, I note that at high resolution (zoomed up to 20 seconds windows), Resmed simply ignores to flag events such as Hypopnea, clear airway,Obstructive Apnea etc, on average 80% less times than Respironics algorithm does. In fact Respironics algo never misses a single event when I examine data at high res.

This explains why Resmed machines generally report a much lower AHI than Respironics. Its too bad that I can't post images here because I can post several comparison examples of sleep data to support what I am saying here.

Resmed CPAP machines tend to report a significantly lower AHI than Philips Respironics machines do, on the same patient (I know because I have both machines). Proponents of Resmed machines (like CPAP resellers and DMEs) explain this difference by alleging that Resmed machines provide better Apnea therapy than Philips Respironics machines do. However according to my own experiments and corroborated by many others, it appears that Resmed machines only report lower AHI numbers because these machines software does NOT check some critical sleep data like "Patient Initiated Breaths" or "a backup rate of Breaths Per Minute setting", or "periodic breathing" or "Clear Airway".

Have you ever come across the same question before? Tell us what your experience has been like.

Wow! That doesn't make much sense unless you have another respiratory condition that is affecting your tidal volume. With your TD that low, I suspect your Oxygen saturation would be low too. Have you been checking it? Also you definitely need to see a pulmonologist to test your lungs

Sierra;

There are several studies that were done both before and way after which debunk that study, now thought to have been purely political for business reasons. Look up Google scholar or [www.Clinicaltrials.gov] for the latest research. Here is one that is being conducted in Canada, thought to be the largest ever and due to end in Dec/2022: https://clinicaltrials.gov/ct2/show/NCT01953874

here is another one: https://www.sciencedirect.com/science/article/abs/pii/S0167527308009820 and another https://www.atsjournals.org/doi/full/10.1164/ajrccm.164.4.9908114 and another https://www.jstage.jst.go.jp/article/circj/advpub/0/advpub_CJ-10-0082/_article/-char/ja/ and one more, but there are more), https://www.jstage.jst.go.jp/article/circj/79/5/79_CJ-15-0221/_article/-char/ja/