Resmed S9 and 10 VPAP adapt (algorithim changed ?)

Has anyone else on a S9 VPAP Adapt noticed a change upon updating to a new S9 or S10 machine? Have found the newer S9 and S10 machines wait for me to begin inhalation before any support is provided. Falling asleep under these conditions is difficult but possible. However, at first Central Event the pressure support is abrupt and causes me to awaken. Background info: I have been using a VPAP Adapt since they first became available in the Resmed S7 form. Changed to S9 VPAP Adapt 36007 when they became available with no issues. New S9 and S10 machines I've tried since about 2015 have all exhibited the same pattern. Anybody have any ideas about why the support these new machines provide is different?

ikabodkrane wrote:Has anyone else on a S9 VPAP Adapt noticed a change upon updating to a new S9 or S10 machine? Have found the newer S9 and S10 machines wait for me to begin inhalation before any support is provided.

first time I've heard this theory.

they *ALL* should wait for you to begin inhalation before support is provided, that's how they work, unless you wait too long and the machine decides you're having an apnea.

palerider wrote:

ikabodkrane wrote:Has anyone else on a S9 VPAP Adapt noticed a change upon updating to a new S9 or S10 machine? Have found the newer S9 and S10 machines wait for me to begin inhalation before any support is provided.

first time I've heard this theory.

they *ALL* should wait for you to begin inhalation before support is provided, that's how they work, unless you wait too long and the machine decides you're having an apnea.

Palerider, Thank you for your response. The S7's (two of them) and S9 VPAP Adapts I have been using for many years all breathe with me as I fall asleep. I'm just looking for some newer machines that perform the same as the three old machines I now have. Please keep in mind I have central apnea so I stop breathing as I fall asleep even though I have no obstruction.

Have you tried contacting Resmed direct or thru your DME with your issues and concerns?
I Think that is really the only possible way you might find out if they did in fact make some change to the Algorithm Midway thru production of the Vpap S9 and Higher.

That might be the difference between the 36007 and the 36037

jtravel wrote:Have you tried contacting Resmed direct or thru your DME with your issues and concerns?
I Think that is really the only possible way you might find out if they did in fact make some change to the Algorithm Midway thru production of the Vpap S9 and Higher.

Jtravel, Yes Resmed says the machines are the same. My DME folks have been wonderful trying to help me find a machine that will replicate my existing machines. Unfortunately, even with their help we have not figured out why the newer machines operate differently. The Resmed firmware has changed however as the hardware has evolved. I don't know if the algorithm has changed. I have almost given up asking why. Just wondering if anybody else has had this experience. I may just search out some older equipment that matches my S9 unit and leave it at that.

grayghost4 wrote:That might be the difference between the 36007 and the 36037

Grayghost4, Yes that may be the difference. But Resmed today told my DME that the 36037 is the updated version of the 36007 that I have. They should work the same. I know that. But I also know they do not work the same! Sure would be good to find someone else who sees the pink elephant too!

I have owned a S9 Adapt model 36007 in the past and currently own a S9 Adapt model 36037.

The 35007 had 2 modes of operation.
CPAP mode
and ASV mode

The 36037 has 3 modes
Cpap mode
ASV mode like the 36007
Auto ASV mode

If you are okay with the 36007 way of doing things just select ASV mode and not Auto ASV mode on the 36037.
Make sure all the settings match including any Ti min and max settings.

Pugsy wrote:I have owned a S9 Adapt model 36007 in the past and currently own a S9 Adapt model 36037.

The 35007 had 2 modes of operation.
CPAP mode
and ASV mode

The 36037 has 3 modes
Cpap mode
ASV mode like the 36007
Auto ASV mode

If you are okay with the 36007 way of doing things just select ASV mode and not Auto ASV mode on the 36037.
Make sure all the settings match including any Ti min and max settings.

Pugsy, Thanks, Tried a 36037A last friday night. I didnt work like the 36007, but I am not sure if DME set to auto or not. I'll check and try again if it was set to auto. What is Ti ? My settings are: eep:6 min:6 max:12

You might ought to get the manual.
It explains Ti Minimum and max along with other comfort settings. Most likely your 36007 was set to the default settings but they might have been changed.
You can request the manual here.
http://www.apneaboard.com/adjust-cpap-p ... tup-manual
I can't explain it very well.

ASV mode works on the 36037 just like it did on the 36007.

Now auto ASV has an additional EPAP (Exhale) setting. Now whether that additional setting is the cause of your problem I don't know.

You need to make sure that all settings match and there are several beyond just the pressure settings.

I think the default mode for the S9 36037 is the Auto ASV mode. Maybe the tech didn't change it to the other "older" mode.

Pugsy wrote:You might ought to get the manual.
It explains Ti Minimum and max along with other comfort settings. Most likely your 36007 was set to the default settings but they might have been changed.
I can't explain it very well.

ASV mode works on the 36037 just like it did on the 36007.

Now auto ASV has an additional EPAP (Exhale) setting. Now whether that additional setting is the cause of your problem I don't know.

You need to make sure that all settings match and there are several beyond just the pressure settings.

I think the default mode for the S9 36037 is the Auto ASV mode. Maybe the tech didn't change it to the other "older" mode.

Pugsy, Thanks, I'll read that manual and reconfirm the setting was ASV not auto ASV

The 36007 has a PS Min of 3, whereas the 36037 and later models can have a PS Min of 0.

Maybe you like or are accustomed to the PS Min of 3? Maybe check PS Min settings on the newer machines to rule out that variable.

klv329 wrote:The 36007 has a PS Min of 3, whereas the 36037 and later models can have a PS Min of 0.

Maybe you like or are accustomed to the PS Min of 3? Maybe check PS Min settings on the newer machines to rule out that variable.

KLV329, Thanks for your thought. I had min pressure set to 6 when I tried the 36037A last Friday. But this forum posting has provided me with a number of investigative steps I can pursue. Meanwhile, I have purchased a nearly new S9 VPAP adapt model 36007A running the same firmware that my existing machine runs: SX474-0905. My hope is it will behave the same as my current machine. I'll have the machine next week, will post results then. Thanks again for your time and thoughts.

Not sure I follow.

I havent looked at a 36007 in awhile, but i thought the 36007 has a 1 EPAP setting, and a PS Min setting and a PS Max setting.

When you write 'min pressure' are you referring to PS Min or the EPAP setting?

In any case, it seems you have identified something that works for you.

The PS Min of 3 on the 36007 didn't suit me, but the 1 early model 36037 that I had seemed more responsive and I liked that.