Sleep Study Feedback & Initial ASV Settings for Beginner

General Discussion on any topic relating to CPAP and/or Sleep Apnea.
togapilot
Posts: 1
Joined: Mon Apr 21, 2008 1:51 pm

Sleep Study Feedback & Initial ASV Settings for Beginner

Post by togapilot » Sat Mar 23, 2024 12:15 pm

First post on the board! I completed a Home Sleep Study (Type II) about one year ago and am I'm looking for some feedback/opinions/recommendations with the understanding that advice provided here should not be construed as medical advice. The sleep study interpretation is that of mild sleep apnea primarily characterized by hypopneas with mixes of obstructive/central features with what I am told are significant desaturations given the relatively low AHI.I won't go into detail unless relevant but an attempt at using CPAP years ago was unsuccessful. I am being told that an oral appliance would not be effective given the prevalence of central apneas as well as the desaturations but this still something that I would like to consider given my past struggles with CPAP. Maybe I am wrong here but it appears to me that the majority of the hypopnea events are obstructive in nature? If so, it would seem that a reduction in the Obstructive events (possibly an oral appliance) would result in a much lower, or even "normal", AHI.

It is my nature to try and dive into reports such as this, to understand them as much as possible and to take an active role in my health - just looking for general feedback and comments on the study and the therapy recommendation from the group. I've attached a redacted copy of my original in-lab study and INCOMPLETE titration from YEARS ago as well as my most recent at-home study.

Initial In-Lab Sleep Study and INCOMPLETE Titration at the following link https://imgur.com/a/6To7l7S

Most Recent at-home study results below and at the following link https://imgur.com/a/dZMcDGv

AHI: 8.3
CA: 3
OA: 1
MA: 1
OH: 56
Average SpO2: 92.5%

Desaturation Index: 7.5 per hour

Further,

I recently purchased an AirCurve 10 ASV machine and hope to get some guidance on initial settings, along with the use of OSCAR, with the end goal being to get this machine dialed in to suite my specific needs. I'm familiar with the clinician's interface on the ASV and how to adjust the settings. I also have a general understanding of how the ASV machine operates in that the EPAP range and PS range will determine the IPAP values (EPAP + PS). I also gather that I should probably start out in auto ASV mode with ramp off. Beyond that, I really don't know where I should start on pressures and hope to get as far ahead of the curve as possible utilizing feedback from the group. I did use the machine for a couple of hours last night and noticed the increased pressure and "blowback" technique that many speak of.

Equally interested in feedback on the desaturations reported in the at-home study.

I'm certainly interested in the possibility of an oral appliance as an alternative to the ASV machine but would like to see how things go and to gather some data through OSCAR to gain some insight into my day-to-day AHI values, specific needs as well as how things like positional therapy might improve my sleep in the event that I'm unable to tolerate the use of CPAP as was the case almost twenty years ago.

AHI from the initial study was 11 with the more recent at-home study showing 8.3. As I understand it, an at-home study may have a tendency to under-report but it is worth noting that the two studies are close?

Many thanks to everyone who takes the time to review my post!

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vandownbytheriver
Posts: 265
Joined: Sat Feb 03, 2024 11:42 pm

Re: Sleep Study Feedback & Initial ASV Settings for Beginner

Post by vandownbytheriver » Sat Mar 23, 2024 2:25 pm

I would set your AC10 to APAP mode and pressures 7-10 with zero PS/EPR. Record a night or a week and examine the Oscar plots and AHI score. You haven't shown you need bi-level yet, baby steps is my advice... very much on the Mild side of things.

_________________
Machine: AirCurve 10 Vauto USA C2C CO
Mask: Fisher & Paykel Vitera Full Face Mask with Headgear (S, M, or L Cushion)
Additional Comments: I use O2Ring, Oscar, SleepHQ, and Cover Roll Stretch mouth tape.