PRODUCT

What your CPAP pressure is really doing

Your prescription sets a range. Your machine decides, breath by breath, where inside it to sit. Pressure insights shows your CPAP pressure P95 against that range night after night, alongside EPR and respiratory rate, so you can see whether the machine is comfortable, cramped or coasting.

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Explore pressure view in a browser frame: 90-night P95 line inside the shaded set range with a dated 6 Mar change marker, AHI overlay, and side tiles for P95 12.4, EPR 2, respiratory rate 14 and the What changed? log

What it is

Pressure insights is the part of Apnealytics that reads the pressure your ResMed machine actually delivered, compares it with the limits you or your clinician set, and dates every change to those settings. It is informational: Apnealytics never changes a setting, and we will always tell you to talk to your clinician before you do.

Pressure chart over 90 nights: P95 hugging the 13 ceiling for five weeks, then a dated settings change (8–13 → 9–14, EPR 3 → 2) after which P95 settles mid-range and AHI falls

How it works

Read from the card
Each night's pressure P95 and the configured minimum and maximum pressure come from the summary file in your SD card import.
Plot against the range
Trends draws P95 inside the shaded band of your set range, so a night pressed against the ceiling is obvious.
Mark settings changes
When the card shows a new pressure range, EPR level or mode, What changed? drops a dated marker on the chart.
Show the detail
Open a night to see pressure P95, the set range, EPR and respiratory rate, and on Pro the pressure waveform itself, including ramp and the exhale drop.
Connect to outcomes
Overlay AHI, leak and event composition to see how your numbers moved after each change.

What you'll see

Pressure P95 and set range
The pressure your machine stayed under for 95 percent of the night, drawn inside the range you set. A P95 that hugs the maximum, night after night, is a pattern worth raising with your clinician; a P95 far below the maximum with a good AHI suggests the range is comfortable.
EPR
Your expiratory pressure relief level per night. Because EPR lowers pressure on exhale, a change in EPR often shows up as a change in comfort, in leak and sometimes in residual events. Apnealytics dates EPR changes so you can see the before and after.
Respiratory rate
Breaths per minute for the night, read from your card. It is a useful context figure when pressure or events move.
What changed?
A list of settings changes with dates: pressure range, EPR, mode. Each one is a tappable marker on the Trends chart and a line in the night detail, so your therapy history reads like a log rather than a mystery.
Pressure waveform (Pro)
The pressure trace for any night in the breath-by-breath viewer: the ramp climbing at the start, the small drop on each exhale from EPR, and the rises the machine makes when it responds to events or flow limitation.

Night detail: P95 12.4 marker inside a 9–14 range gauge, EPR 2, respiratory rate 14, AHI 2.8, and a Pro pressure waveform showing the ramp and EPR exhale drops

Free vs Pro

Pressure P95, set range, EPR, respiratory rate and the What changed? log are free for your last 30 nights. Pro adds full history, so you can review pressure across every settings change you have ever made, and the per-night pressure waveform.

See pricing

FAQ

Questions people ask

Help center →

What is pressure P95 on a CPAP machine?

The pressure level your machine stayed at or below for 95 percent of the night. It is a better summary than the maximum because a brief spike to the ceiling does not define the night, and better than the average because it shows where the machine needed to be when events were happening. ResMed reports it on the machine; Apnealytics shows it over time.

Is it bad if my pressure is always at the maximum?

Not necessarily, but it is worth a conversation. A P95 that sits at the top of your range means the machine may want more than it is allowed. Whether raising the maximum is right depends on your AHI, leak, comfort and diagnosis, which is a decision for you and your clinician. Apnealytics shows the pattern; it does not recommend a setting.

What does EPR do?

Expiratory pressure relief lowers the pressure slightly each time you breathe out, by one, two or three cmH₂O on ResMed machines, to make exhaling more comfortable. Some people find higher EPR increases residual events, others find it essential to keep the mask on. Our guide to pressure, EPR and ramp explains the trade-offs.

Can Apnealytics change my CPAP pressure?

No. Apnealytics reads data from your SD card and never writes to it or to your machine. Settings changes belong with your clinician, and any change you make yourself should be discussed with them first. Apnealytics helps by showing clearly what happened after a change.

How do I know when my settings were changed?

What changed? reads the settings recorded on your card for each night and lists every change with its date. You do not need to remember or log it yourself, although you can add a journal note for context.