ASV Min PS = 0

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ASV Min PS = 0

Postby MrBig » Sat Feb 15, 2014 12:00 am

Any of you start ASV w/ Min PS of 0? If so, why? Thanks.
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Postby MrBig » Mon Feb 24, 2014 6:12 pm

No one? lol
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Postby somnonaut » Mon Feb 24, 2014 6:25 pm

It is CPAP in that setting. I don't follow.
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Postby MrBig » Mon Feb 24, 2014 10:06 pm

I usually start with a Min PS of 4cm, myself. But the other day, I noticed a Tech had done an ASV Tx at 0cm Min PS, for the entire study. Also, I had done an ASV Tx myself, started and ended with Min PS of 4cm, and the MD scripted 0cm Min PS. I thought that was pretty strange, but thought I'd check here to see if there's just something I don't know about.
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Postby linuxgeek » Tue Feb 25, 2014 5:57 pm

Pretty much akin to an auto CPAP setting of 4-20.
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Postby somnonaut » Tue Feb 25, 2014 7:19 pm

But it would not increase EPAP, since ASV relies on the human to set EPAP.
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Postby somnus diabolus » Thu Feb 27, 2014 4:01 am

All min pressure support is, is essentially the IPAP min. So, if you have a Complex Sleep Apnea Pt that is fine with CPAP of say, 7cm on thir side, but is a trainwreck central machine on their back, but 7cm EPAP still fixed obstructive Apnea component, then ASV - EPAP 7cm, Min PS 0, Max PS of 15 would be appropriate. Pretty rare, but there it is.
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Postby somnonaut » Thu Feb 27, 2014 6:05 am

Right, but LG said "Pretty much akin to an auto CPAP setting of 4-20." So I was pointing out that it still required the human to adjust the EPAP in ASV. Yeah it will increase PS if it finds need, but the EPAP will not move by its own built-in algorithm.
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Postby somnus diabolus » Thu Feb 27, 2014 6:47 am

Right. I was answering the original question. Plus, there is Auto ASV now that adjusts EPAP as well. Never used it before though myself
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Postby linuxgeek » Thu Feb 27, 2014 5:57 pm

somnus diabolus wrote:Right. I was answering the original question. Plus, there is Auto ASV now that adjusts EPAP as well. Never used it before though myself


Yeah I was thinking this. I think even AdaptSV has added this. No?
Just put it on 'auto' and let god sort 'em out. :)
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ASV

Postby zack » Mon Mar 03, 2014 4:38 am

The Respironics ASV has an auto EPAP ( chases obstruction) and an auto PS ( chases minute volume). I guess the thinking that the therapy can be as minimal as possible if its positional or sleep stage predominant?
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