APAP Suddenly Not Detecting AHI (2024)

Rootkit

Posts: 11
Threads: 3
Joined: Apr 2021

Machine: Resmed Airsense 10
Mask Type: Nasal mask
Mask Make & Model: Airfit N20
Humidifier: Resmed Airsense 10
CPAP Pressure: 9
CPAP Software: myAir

Other Comments:

Sex: Female
Location: United States

06-01-2022, 12:24 PM (This post was last modified: 06-01-2022, 12:35 PM by Rootkit.)

APAP Suddenly Not Detecting AHI

Machine: Resmed Airsense for Her 10
Mask: Airfit N20
Average AHI: >1 but usually settles around 0.3 - 0.5
Tracking: MyAir
***I don't use Oscar, as it may come up***
Pressure Range: 5-9, usually 7-8 at night

I've been using this machine for about a year, with no issues. I clean the hose and tank once a week and switch my mask and filter every 2.

On Sunday, I did my usual cleaning (hose in soapy hot water and soft brush cleaning of the tank), let everything dry, and reattached everything. It was time to switch my mask and replace the filter. I woke up Monday with an AHI of 0.0. This isn't totally unusual as I get the occasional 0.0 but it isn't super common. I woke up Monday night to another AHI of 0.0 and again, this morning to another 0.0.

The machine isn't detecting any mask leaks. I checked all my connections, re-plugged in the hose attachment, thought maybe the mask replacement might be a dud and switched to a new one, adjusted the fit of the N20 head gear,and removed and reslotted the water tank. I'm WFH today, so I was able to go back to sleep to test out if any of these steps fixed the problem but I still am showing an AHI of 0.0. I'm unable to find any tears in the hose. I have back up water tank that I can switch to see if that's the problem, but I think based on what I've read AHI detection is most influenced by mask and hose leaks. I can't find any leaks though and I haven't changed how I wear the mask and haven't had a problem until Sunday. ETA: I did have the machine unplugged for most of Sunday as I needed the power outlet to run a vacuum and carpet steamer. The machine is rarely unplugged, otherwise.

It could be the case that I'm just having a hot streak of no AHIs but I really don't think that's true. I've left a message with my sleep doctor but it may take a day or two for her to get back with me. I'm getting consistent pressure at night but I'm concerned that because the machine adjusts pressure based on the apnea events it detects, I'm not getting meaningful pressure that's helpful.

Does anyone know how else I can troubleshoot this? Would resetting the machine maybe help? Is this something that can just break on the machine and do I need to look into getting it replaced or repaired?

Thanks!

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staceyburke

Posts: 3,686
Threads: 15
Joined: Jun 2020

Machine: Resmed AirCurve VAUTO
Mask Type: Full face mask
Mask Make & Model: ResMed f30 & f30i
Humidifier: ResMed
CPAP Pressure: PS 5.6 over 6.2-19
CPAP Software: OSCARmyAir

Other Comments: O2 and pulse CMS 50F

Sex: Male
Location: colorado usa

06-01-2022, 02:19 PM

RE: APAP Suddenly Not Detecting AHI

You said you don’t use Oscar but that is what gives us the data to know what is happening!

Apnea (80-100%) 10 seconds,Hypopnea (50-80%) 10 seconds, Flow Limits (0-50%) not timed Cervical Collar - Dealing w DME - Chart Organizing

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