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New on Bipap ASV, have a few questions
#61
RE: New on Bipap ASV, have a few questions
I agree with SleepRider that your Hypopneas are the residual of an incompletely stopped Central Apnea. There is a thing called Central Hypopnea. This is identified by the lack of breathing effort which are identified by those stress sensors that you wear around your chest and waist during a sleep study. Unfortunately, most sleep studies do not split these out, I haven't seen one yet. I think that nearly all your hypopneas are central hypopneas. The purpose of the backup is to trigger a breath when you have a central event, and in ResMeds case maintain a "constant" minute vent.
Fred Bonjour - Project Manager and Lead Tester for OSCAR - Open Source CPAP Analysis Reporter

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#62
RE: New on Bipap ASV, have a few questions
You are very likely right and my assumptions are probably wrong, I didn't even know Central Hypopnea was a thing Smile You definitely have much more experience.

I might still try the backup off for one night, just so I can lay that theory to rest Wink

With all that said, it seems my central are not properly treated, and more pressure didn't seem to help with that (and caused aerophagia), it almost sounds like the solution would be to use a resmed with the faster response then ? Is there something else I should try with this dreamstation ?
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#63
RE: New on Bipap ASV, have a few questions
So I have tried without BPM and ... it was a mixed bag, but I'd like to hear what you make of it.

Removing the swj before 11:45 the AHI was under 5 which is good for me, and I do feel like I slept pretty good.

OTH, more CA for sure but much less Hypopneas (which may confirm your theory), from the graph I can see that my breaths dropped very low (single digit), during some CA's, so yeah I probably do need some backup rate to prevent those., seems I stop breathing a few times :-/

My natural breathing rate seems to very low (9-12 or so), don't know if that's normal, I always have a low heartbeat too though, if its related (40's at night, 60's day time).  So a backup rate is probably good for me, but it might need to be set low to not interfere constantly with my "normal" breathing rate ?

Even though the AHI is better, CA's are probably worst than hypopnea right ?

Anyway does this give you any useful data, any other settings I should try ?

           
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#64
RE: New on Bipap ASV, have a few questions
I think turning off the backup rate has shown that the hypopnoeas is caused by the machine trying to induce a breath and failling to induce a full one due to the limited pressure rise as we suspected earlier.
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#65
RE: New on Bipap ASV, have a few questions
Thanks, that makes sense, that pressure rise is not configurable though, is it ?

It sounds like the resmed could potentially really help me if that's the main issue .... there seem to be a lot of stories of people having much better results with the resmed than they did with the dreamstation for some eason.

I did find a better liked DME that can get me a resmed machines provided I get my prescription and study from the clinic (trying to), so I might try to return this machine and then switch to that new DME to get a new one, hopefully Resmed.

If I was using the backup rate consistently (say 12) do you think it's possible/likely that my body would adapt to it overtime ? maybe that's what the Dr was after.
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#66
RE: New on Bipap ASV, have a few questions
Your median rate 12 and your range is 8 to 19 your backup rate should be slightly slower than your normal rate. Try backup rate of 10, a bit lower than your med is an.
Fred Bonjour - Project Manager and Lead Tester for OSCAR - Open Source CPAP Analysis Reporter

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New to Apnea? Helpful tips to ensure success
Soft Cervical Collar
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Dealing with a DME
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#67
RE: New on Bipap ASV, have a few questions
Yeah I had set it to 10 for that reason a few days ago, see post #34
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#68
RE: New on Bipap ASV, have a few questions
I have tried changing the Ti setting, a value around 1.8 seems more comfortable fo me than 1.2 ... but in any case it had no effect on the hypopneas.

I'm near 0 on CA's and OA's but with still tons of those "hypnoeas" (or mistreated CA's)

Is there anything else I can do about those ?
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#69
RE: New on Bipap ASV, have a few questions
I might have to go to the clinic in person, i messaged them and talked to them on the phone, but so far haven't been able to get my study data and raw prescription (with equipment code) ....
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#70
RE: New on Bipap ASV, have a few questions
Hope you get these items. Just don't take a hammer to them. I can't travel well right now so I'd be unable to visit you in jail.
Dave

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