Quick answer: Bilevel positive airway pressure (BPAP, often called BiPAP) delivers different pressure levels when you breathe in and out. It is a prescription therapy used for certain breathing conditions. The appropriate device, mode and settings depend on your diagnosis and should be selected with your clinician and equipment provider. Bilevel is not automatically better than CPAP for every person with sleep apnea.
What is a bilevel PAP machine?
A PAP machine delivers pressurized air through a mask. A bilevel device can provide a higher pressure during inhalation and a lower pressure during exhalation. A CPAP device generally provides a continuous pressure; an auto-adjusting PAP device varies pressure within a prescribed range. The National Heart, Lung, and Blood Institute explains these types and recommends discussing which is appropriate with a healthcare provider.
Some bilevel devices and modes have different intended uses and capabilities. The exact condition, prescribed pressures and other medical needs determine whether a device is appropriate. Do not change a prescribed mode or pressure on your own.
When might a clinician prescribe bilevel therapy?
For some people, continuous pressure is difficult to tolerate, or another condition calls for a different type of breathing support. The FDA’s sleep-apnea overview notes that a clinician may prescribe bilevel therapy for some patients who cannot use CPAP because of continuous pressure. It is not a recommendation to switch therapies without clinical review.
Features to discuss with your care team
- Prescription and mode: Confirm the device and prescribed settings match your diagnosis. Not all bilevel devices offer the same modes or are intended for the same patients.
- Mask fit: Compare nasal and full-face interfaces with your provider. Leaks or discomfort can interfere with use.
- Humidification: Ask whether a humidifier or compatible heated tube may help with dryness. Follow the manufacturer’s instructions.
- Data and follow-up: Ask what information your care team can review and how they will check whether your treatment is working.
- Power and travel: Verify the exact model’s power needs, battery compatibility and airline requirements before a trip.
- Costs and supplies: Ask about insurance, rental versus purchase, replacement filters, tubing and masks, and the provider’s return and service policies.
Models named in the earlier article
The earlier version mentioned the ResMed AirCurve 10 VAuto, Luna G3 BPAP 25A and DeVilbiss IntelliPAP AutoBilevel. They are retained as historical examples, not a current ranking or a recommendation for your medical needs. Their availability, intended uses, features and prices need confirmation with the manufacturer and equipment provider. Yawnder may earn a commission from qualifying purchases.
Using and caring for your equipment
Follow your clinician’s prescription and the device and mask instructions. If your mask leaks, you feel uncomfortable or dryness makes use difficult, contact your care team rather than stopping or changing settings without advice. The NHLBI’s living-with-sleep-apnea guide covers fit, follow-up and care. Use the manufacturer’s cleaning instructions for your exact equipment and keep replacement supplies current.
Frequently asked questions
Is bilevel PAP better than CPAP?
Not for everyone. Your diagnosis, pressure needs and experience with treatment determine which option your clinician recommends.
Can I adjust the pressure myself?
Discuss pressure or mode changes with your prescribing clinician or equipment provider. Do not alter prescribed therapy based on a website.
Do all bilevel machines have the same features?
No. Modes, humidification, data, power options and intended uses vary by model. Check the exact device against your prescription.
What if my mask or machine is uncomfortable?
Contact your care team. They can assess fit, leaks, dryness and whether equipment or prescribed settings need review.