How to Adjust Air Pressure on a ResMed AirSense 11: A 7-Step Field Checklist

Six years ago I took the role of clinical equipment coordinator at a hospital-based sleep center. My job includes programming every PAP device before it goes out to a patient. I have kept a mistake log since year one: ten significant errors so far, adding up to roughly $3,800 in wasted supplies, staff time, and callback visits. In January 2024 I turned that log into the checklist below, and in the first four months it caught 47 potential setup errors before patients ever saw the devices.

This guide explains how to adjust air pressure on a ResMed AirSense 11 in seven steps. It also covers the ResMed AirCurve 10 VAuto bi-level machine — a device many people still describe as a BiPAP machine — because its settings follow a different logic. That difference cost me one of my dumber mistakes. If you are a patient looking for a way to change your own pressure, this is not that guide. Stop here and call the clinician who manages your therapy instead.

The Seven-Step Pressure Setup Checklist

Step 1: Confirm the full order before you touch the device

Read the whole order, not just the number. The AirSense 11 will accept whatever you type. It does not sanity-check the pressure against the prescription, so the safety net is you. Before entering the clinical menu, confirm the following:

• Mode. An AirSense 11 programmed as CPAP delivers one pressure on every breath. The same machine in AutoSet delivers a range. They are not interchangeable.
• EPR. Expiratory pressure relief drops the pressure by up to 3 cmH₂O when the patient exhales. If the prescription says EPR 3 and the device still has EPR off from the previous patient, the patient is not getting the therapy that was ordered.
• Mask type. Nasal pillows, nasal masks, and full-face masks have different intentional leak rates. If the mask setting does not match what the patient is using, your leak data will not mean what you think it means.

In my first year, I set eight devices to the number in the "maximum allowed" column of a spreadsheet instead of the actual prescription column. Eight devices, three hours of rework, and a very quiet walk back to my desk. The device did what I told it to do, not what the physician ordered. That is the uncomfortable thing about programming these machines: they trust you completely.

Step 2: Enter the clinical menu

The AirSense 11 hides therapy settings on purpose. You cannot change pressure from the patient home screen, and that is not an oversight. Put the machine in standby, then press and hold the My Sleep View and My Options controls together for about three seconds. The clinical settings screen should appear.

On the AirCurve 10 VAuto and other AirSense 10-era hardware, the idea is the same but the controls are different: from the home screen, press and hold the Home button and the dial together for three seconds.

This was accurate as of May 2024 on the firmware our center uses. ResMed does update software, so if the combination does not work on your unit, check the current provider guide instead of tapping through every option for ten minutes like I did in my first month. (Note to self: those ten minutes are still missing from my life.)

Step 3: Match the mode to the prescription before entering pressures

In the clinical menu, mode is the first decision. If the order says fixed CPAP 10, choose CPAP and you will get a single Treatment Pressure field. If the order says APAP 8–12, choose AutoSet and you will get Min Pressure and Max Pressure fields. Do not assume the last programmed mode is the right one.

Everything I had been taught in training said the mode was an obvious checkbox. I only started taking it seriously after I sent a patient home with the machine still in AutoSet when the order was fixed CPAP. The unit spent the night adjusting to a range the physician had not ordered. The patient called the next morning and asked if the device was broken. It was not broken. I was wrong.

Step 4: Enter the pressure values — CPAP or AutoSet

Now the actual numbers:

• Fixed CPAP: set Treatment Pressure to the prescribed value, shown in cmH₂O.
• AutoSet: set Min Pressure and Max Pressure to the prescribed range.

Then set EPR and ramp if the prescription includes them. If the order is silent on ramp, do not invent an aggressive ramp time; keep it simple and note what you chose. If the order includes EPR, treat it as part of the therapy, not as a comfort extra that can wait until later.

Read the numbers back after you enter them. Readback is not for people who do not trust themselves. It is for people who know how easy it is to skip a digit. I once typed 11.0 when the order said 10.0. The device accepted it silently. It was a small difference and still the wrong setting. Now I read every field aloud after keying it, and if a second person is nearby, they read it back from the screen.

Step 5: If the device is an AirCurve 10 VAuto, put away the CPAP mindset

The AirCurve 10 VAuto is a bi-level machine. It delivers a higher pressure during inspiration (IPAP) and a lower pressure during expiration (EPAP). The difference between those two pressures is called pressure support (PS). This device does not have one "pressure" field the way an AirSense does. You will be setting a minimum EPAP, a maximum IPAP, and PS.

This is where my error log gets expensive. In March 2023 I received an order for IPAP 18, EPAP 10. I set Min EPAP to 10 and Max IPAP to 18, then left PS at whatever was already stored in the machine. The patient came back saying the new AirCurve felt weaker than the demo unit. The data confirmed why: PS was 4, so with an EPAP of 10, the device was delivering an IPAP around 14. The ordered target was 18/10 — an 8 cmH₂O difference, not a 4 cmH₂O difference.

Before programming an AirCurve 10 VAuto, do the math: IPAP = EPAP + PS. If the prescription gives you IPAP and EPAP, the PS is the gap between them. If the clinician expects fixed bi-level pressure, confirm whether they want VAuto mode or a fixed mode. Entering the numbers without understanding how the device uses them is how people like me end up in a mistake log.

Step 6: Save, re-enter, read back, and run a mask fit

After you save and exit, go back in. Re-enter the clinical menu and read every value on the screen back against the prescription. It takes about sixty seconds and it catches mistakes that feel impossible until they happen.

Then run a Mask Fit cycle with the patient's actual mask connected. Mask fit tests the seal between mask and skin. It will not tell you whether the pressure is clinically correct, but it will tell you whether the setup is usable. If the mask leaks heavily at the prescribed pressure, the patient will rip it off at 2 a.m. and you will get an angry call the next day. I have received that call.

Step 7: Recheck the clinical data after a week

Completing a pressure adjustment does not end at the device screen. It ends when the data shows the therapy is actually working. In our center, the device sends data to the clinical review system automatically, so follow-up does not require an extra visit. If your patients bring in an SD card or you use a different platform, build the same habit.

After the first week, review the key numbers: residual AHI, leak, and 95th percentile pressure. If the patient's pressure is pinned at the maximum every night, or the leak is consistently high, that is a conversation for the prescribing clinician — not a reason to silently turn the dial. The 95th percentile pressure tells you what the device actually delivered, and it is often different from what you typed. If you and the physician do not look at it, you are flying without instruments.

The conventional wisdom in our department used to be that pressure is set once and only revisited if the patient complains. The data changed my mind. I only believed that after a patient's 95th percentile pressure stayed above the prescribed ceiling for two weeks without anyone flagging it. The machine was doing its job — adjusting upward to treat events. The problem was that the treatment plan was never updated to match. A pressure adjustment is the start of a feedback loop, not the end of it.

Quick checks when a "correct" setup still looks wrong

If you followed every step and the patient's data or complaints still do not match the prescription, check these before you change anything:

• Mode again. The most common cause of a "correct" pressure being wrong is that the mode is wrong. A fixed pressure entered in an auto mode behaves differently.
• EPR and ramp. These fields can silently change how the therapy feels and how much pressure the patient actually receives on exhalation.
• Mask type. The data can look like a leak problem when the real problem is a full-face mask programmed as nasal pillows.
• Copying from a previous patient. It is tempting to use the last device as a template. Take the extra minute and clear the old settings. Stale settings have caused more than one mystery.

And when you document the change, write down what you set, the date, and your initials. An entry that says "pressure adjusted" with no number does not help the next person. It also makes it nearly impossible to audit later.

One more thing worth saying plainly: PAP therapy treats obstructive sleep apnea. It does not cure it. The word choice matters in patient education and in the medical record, so I keep it accurate.

If you are the patient who found this because you wanted to change your own AirSense 11 pressure: I understand the temptation, but please do not. The clinical menu is hidden for a reason. Your physician can review your therapy data and adjust the prescription when it is appropriate. An informed patient asks good questions and gets better care. That is the path I would take.