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+--- Thread: AHI problem (/Thread-AHI-problem)
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RE: AHI problem - RLSdss - 12-14-2017
Back up rate is set for Auto.
RE: AHI problem - RLSdss - 12-14-2017
Also forgot to update settings.
RE: AHI problem - Sleeprider - 12-14-2017
Ah, okay. Previously you had indicated off or zero.
RE: AHI problem - RLSdss - 12-15-2017
If you check, my machine is set for Pmax 14, APAPmax 11, APAPmin 9. PAmax 4, PSmin 0, BPM Auto. Last night with theses settings my AHI was between 1.3 and 3.5 for the whole night of 7.5 hrs.
RE: AHI problem - Sleeprider - 12-15-2017
(12-15-2017, 09:02 AM)RLSdss Wrote: If you check, my machine is set for Pmax 14, APAPmax 11, APAPmin 9. PAmax 4, PSmin 0, BPM Auto. Last night with theses settings my AHI was between 1.3 and 3.5 for the whole night of 7.5 hrs.
Some of your terminology is a bit confusing to me:
Pmax 14 (maximum pressure or IPAP max)
APAP max 11 (EPAP max maximum expiratory pressure?)
APAPmin 9 (EPAP min minimum expiratorypressure?)
PAmax 4 (PSmax?)
PSmin 0
If my understanding is correct, your minimum pressure is 9/9 (PS 0 over 9 EPAP).
Your EPAP may rise to 13/9 to 14/11 (PS 0-4 over 14/11 pressure where IPAP max is limited.
If you have a central apnea, you will need at least 8-10 cm of pressure to cause a breath, so at no time are you getting the benefit of ASV pressure support because it is limited by PSmax and IPAPmax or Pmax. To let your machine actually help you, you need a PS max of 10 to 12, not 4.0, and a Pmax (IPAPmax) of 21.0, which is 10-cm above your EPAP max. What you are currently getting is like a BiPAP Auto with very limited pressure support. Although you have a backup rate enabled, the most it is able to provide as inspiratory assist is 3-4 cm of pressure support.
For ASV you need:
EPAP min 9.0
EPAP max 11.0
PS min 0
PS max 10
IPAP max (Pmax) 21.0
RE: AHI problem - RLSdss - 12-15-2017
I meant epap and that is what is on my side bar. If I change to the settings you recommend what would you expect my AHI to be? I'm currently getting an AHI of 1.3 to 3.4.
RE: AHI problem - Walla Walla - 12-15-2017
OK I'm trying to follow this. I went back to another thread and you said you were misdiagnosed with Central's and that they were going to put you on a Auto Bipap. Now your asking about settings for the ASV and it sounds like you do get Centrals. Can you please clear up my confusion?
RE: AHI problem - Sleeprider - 12-15-2017
(12-15-2017, 09:41 AM)RLSdss Wrote: I meant epap and that is what is on my side bar. If I change to the settings you recommend what would you expect my AHI to be? I'm currently getting an AHI of 1.3 to 3.4.
Your AHI is in an acceptable range and we don't know if those events are obstructive, or CA and H which would be targeted by ASV. Your objectives for the therapy and sense of well-being are yours to define. If you want to try the full functionality of ASV, then the settings above would work; otherwise, you are using auto-bilevel. ASV can provide benefits beyond AHI reduction, but since you can't post the data, it's very hard for us to judge. Hopefully you got copies of your sleep test and have a good sense of why ASV was prescribed, or the reasons it is not needed. At the current settings, you have not experienced ASV.