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Does a Large Leak Cause An AHI Error?
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Does a Large Leak Cause An AHI Error?
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BlueSky1958
Posts: 161 Threads: 38 Joined: Apr 2023
Machine: AirSense 11
07-19-2023, 06:11 AM
Does a Large Leak Cause An AHI Error?
Last night had a big increase in large leak % (not sure why but I think my cushion is wearing out). Anyway, I was wondering if the leak is big enough, could that cause the machine to not be able to measure AHI accurately because of the leak? My AHI was 0.59, but I want to rule out that it could be a "false positive."
staceyburke
Posts: 3,682 Threads: 15 Joined: Jun 2020
Machine: Resmed AirCurve VAUTO
07-19-2023, 08:33 AM
RE: Does a Large Leak Cause An AHI Error?
IF you have a large leak that shows up as gray, that period of time there will be no events scored because the event will not register. Events are ones that the air meets resistance and if you have a large leak there is not enough resistance to the pressure to record an event (O or H, flow limits)
You may want to share a nights OSCAR charts and get some feedback.
Apnea (80-100%) 10 seconds, Hypopnea (50-80%) 10 seconds, Flow Limits (0-50%) not timed Cervical Collar - Dealing w DME - Chart Organizing
BlueSky1958
Posts: 161 Threads: 38 Joined: Apr 2023
Machine: AirSense 11
07-19-2023, 08:42 AM
RE: Does a Large Leak Cause An AHI Error?
Thanks for the reply - that confirms mu suspicion. Screenshot of last night attached. I looked back and typically my Large Leak % is well below 3 and usually between 1-2, and often below 1%. So I suspect I had a mask malfunction last night and that may have impacted my AHI (although being under 1% AHI happens reasonably often too).
Leak stats attached too.
Jeff8356
Posts: 2,149 Threads: 92 Joined: Oct 2019
Machine: ResMed Airsense 10 Autoset
07-19-2023, 06:07 PM
RE: Does a Large Leak Cause An AHI Error?
FWIW - for Resmed, anything 24 l/min and above the machine may not be able to reliably or accurately detect events.
Jeff8356
NOTE:
Jeff8356 has not been active on forums since October, 2023. He cannot reply to you. MacBook Air (2017, Intel) | macOS Monterey (12.7) | OSCAR v1.5.1 | VM = Win10/Win11 | How to Links: Installing OSCAR on a Mac Organizing your OSCAR charts Attaching screenshots and files for the forum OSCAR Help OSCAR - The Guide
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Does a Large Leak Cause An AHI Error?
