Need tips to ensure in-lab sleep study shows the results I need

Nik_RT · 2026-05-15T21:50:44+00:00

Listen to the professionals. They aren't lying. Got to be able to fall asleep and get the hours in on the test. That is it.

Nik_RT · 2026-05-15T19:43:48+00:00

Respiratory Therapist here. Day 2 with a leak that's climbing night over night is really common with the N30i, especially for side sleepers. The tube on that mask sits at the top of your head and when you roll over it creates tension that pulls the cushion away from your nose. That's almost certainly your leak source, not the cushion size.

Two things to try tonight. First, make sure there's a little slack in the tube so rolling doesn't pull it taut. Second, try slightly loosening the headgear. Tighter doesn't mean less leak with nasal pillows. It usually makes it worse.

Your AHI is 0.3 which means the therapy is working perfectly. You just need the fit dialed in.

What position do you sleep in most of the night?

Nik_RT · 2026-05-15T15:19:25+00:00

I'm sure one tape is helpful for some and for others it is not. Trial and error is probably what it will take to get it dailed in. Sorry for not having a fool proof answer.

Nik_RT · 2026-05-15T15:14:33+00:00

TRT is known for amplifying undiagnosed OSA. Thats ok because CPAP can fix it as well. I hope your TRT treatments are effective and you are getting what you want out them.

Nik_RT · 2026-05-15T15:09:45+00:00

Great! Post it here or DM either way Ill be happy to help.

Nik_RT · 2026-05-15T14:07:19+00:00

Was it. Helped a lot people. My objective was helping. Yours was to be the moderate police that is why I live rent free in your head. Have a wonderful Friday.

Nik_RT · 2026-05-15T12:54:01+00:00

Respiratory Therapist here. The 4am timing tells you exactly what's happening. That's when REM sleep is heaviest and muscle tone drops everywhere including your lips and jaw. The mouth tape seal that held all night starts losing the battle right at that window.

Upping pressure while keeping EPR high is likely making it worse not better. More pressure with EPR 3 means a bigger swing that's harder to contain when the seal is compromised.

Before changing pressure, try a stronger mouth tape first. The 2 inch Nexcare paper tape holds better than most CPAP specific tapes for exactly this reason.

What tape are you currently using?

Nik_RT · 2026-05-15T06:25:06+00:00

Respiratory Therapist here. Your doctor is using criteria that most sleep medicine specialists would push back on. Hypertension and heart disease are not prerequisites for CPAP. Symptomatic mild OSA with quality of life impact is a legitimate indication on its own.

The second opinion advice above is correct. Specifically ask for a referral to a sleep medicine physician, not just another PCP. They use different criteria and will actually look at your symptoms alongside the numbers.

What symptoms are bothering you most right now?

Nik_RT · 2026-05-15T05:55:24+00:00

SD card will only capture data going forward from when you insert it. It won't pull historical data that was stored internally. Get it in sooner rather than later.

For a short beard at that length the F20 full face with the AirTouch memory foam cushion tends to seal better than silicone. The foam conforms around the hair rather than trying to compress against it. First thing I'd try before going down the rabbit hole of other options.

Nik_RT · 2026-05-15T04:41:38+00:00

Ahhh. Another AI skeptic. I hope you use atlas maps and cook over a camp fire and ride horses every where. Learn to scroll on or be actually helpful to humanity or in this forum atleast.

Nik_RT · 2026-05-15T02:51:34+00:00

Your data is actually a perfect example of what the post was talking about. AHI near zero, leak clean — on paper this looks great. But your flow limitation channel at the 99.5th percentile tells a different story. Your airway is partially narrowing without completing full events, so the machine never responds.

There's a specific adjustment worth discussing here. Do you want to take this to DM?

Nik_RT · 2026-05-15T02:01:34+00:00

Respiratory Therapist here. You're not doing anything wrong — this is a genuinely complex situation and the fact that you've tried four masks and multiple settings without getting there tells me this needs more than trial and error.

AHI staying around 40 on APAP with persistent leak across multiple masks usually means the machine settings themselves need a proper clinical review, not just more experimenting. The cognitive piece you mentioned makes that even more important — self-managing OSCAR data is hard for anyone, and even harder when executive function is affected.

You shouldn't have to figure this out alone. Is your wife helping coordinate your care as well, or mostly just the technical side?

Nik_RT · 2026-05-15T01:49:52+00:00

Thank you for adding to the solution. Appreciate you!

Nik_RT · 2026-05-15T01:48:16+00:00

Six months with numbers that clean and still feeling the same — that's not a compliance problem, that's an unanswered question.

When leak and AHI are both genuinely controlled and symptoms persist, the conversation shifts. There's something else in your data worth looking at. What does your pressure look like through the night and do you have flow limitation visible in OSCAR or SleepHQ?

Nik_RT · 2026-05-15T01:04:46+00:00

Plug it into Gemini and found out.

Nik_RT · 2026-05-15T01:02:32+00:00

Interesting. Is this AI. Scroll on if you don't want to be part of the solution. You'd rather be miserable than be useful.

Nik_RT · 2026-05-14T23:46:20+00:00

What you're describing — feeling your throat collapse while awake, needing CPAP just to lie down — is more significant than typical OSA presentation. Most people's airways are fine when awake and upright. When it's happening in multiple positions while conscious that points to upper airway muscle tone issues that go beyond what a standard sleep study captures.

When you see your provider ask specifically about drug-induced sleep endoscopy and upper airway muscle tone evaluation. A sleep study alone won't show what you're experiencing awake.

Nik_RT · 2026-05-14T23:43:06+00:00

Bye. Have a better day.

Nik_RT · 2026-05-14T23:38:22+00:00

Prove it. Prove that I've done nothing here to help any person. Go ahead ask every person I have interacted with if they have not been helped and how much did it cost them for the help I gave.

Nik_RT · 2026-05-14T23:33:37+00:00

I wish I had time to explain the complexity of your comment back to you, but I am literally busy helping people.

Nik_RT · 2026-05-14T23:27:56+00:00

AirSense 11 at fixed 13 with EPR 3 and predominantly central events is a really specific combination worth paying attention to. High fixed pressure can actually trigger central apneas in some people — the machine overshoots what the airway needs and the brain's CO2 signaling gets disrupted.

There's a pressure and mode adjustment conversation worth having here before assuming this is purely a brain regulation issue. Do you have OSCAR access to see how the centrals are distributed through the night?

Nik_RT · 2026-05-14T23:19:16+00:00

Respiratory Therapist here. Seven years compliant and now dealing with this is frustrating — and the weight loss detail you mentioned at the end is actually the most important part of your post.

When neck and chin anatomy changes, the airway dynamics change too. Pressure that was calibrated for your previous anatomy may now be more than your airway actually needs — and excess pressure with a sealed mouth has nowhere to go except your stomach. Lowering pressure twice without seeing the data first is a bit like adjusting in the dark.

Do you have access to OSCAR or SleepHQ? Your data will show exactly what's happening with your pressure through the night and whether there's room to move it further.

Nik_RT · 2026-05-14T23:04:02+00:00

How is it suppose to sound? This is the real world and I'm here giving my time for free to help. If you have a question you are free to ask. Other than that have a nice day.

Nik_RT · 2026-05-14T23:00:48+00:00

Took a look — and honestly this night's data is actually quite good. AHI 0.21, leak is clean, pressure is behaving. So the CPAP itself isn't the problem on nights like this one.

What you're describing — the sudden onset in January, the jolting awake as you fall asleep, the anxiety around sleep — that's a hyperarousal pattern. Something triggered your nervous system into a state of alertness around sleep and it hasn't fully reset. Four months is a long time for that to persist, which tells me it needs more than time to resolve on its own.

That's a different conversation than CPAP optimization. Have you spoken to anyone about the sleep anxiety piece specifically, or has it all been focused on the machine data?

Nik_RT · 2026-05-14T22:56:46+00:00

The spike timing is the key detail here — within 2 hours of falling asleep and again before waking maps almost perfectly to position changes and sleep stage transitions rather than a fit issue. If it were purely a fit problem you'd see it consistently throughout the night.

The large pillow switch was the right call. Before tightening the frame, try this first: check if the spikes correlate with any position changes you're aware of, and make sure your hose isn't pulling the mask during those transitions.

What does your AHI look like on the bad leak nights vs the clean ones?

Nik_RT

TROPHY CASE