Difference between CPAP and BIPAP
Difference Between CPAP and BiPAP Machines
If you’ve recently been diagnosed with sleep apnea, or if you’re exploring your therapy options, you’ve likely heard of both CPAP machines and BiPAP machines. But what exactly are they, and how do they differ? Understanding these differences is key to choosing the right treatment and feeling comfortable with your therapy.
This guide, written in a friendly, easy-to-read style, explains how CPAP and BiPAP machines work, why one might be recommended over the other, and what practical factors you should consider. Whether you’re a first-time user or a seasoned CPAP user wondering if BiPAP might be right for you, we’re here to help. Remember, the team at Sove CPAP Clinic is always ready to assist you with expert guidance, machine fittings, and accessories to make your therapy as comfortable and effective as possible.
Learn How CPAP and BiPAP Deliver Pressure Differently
CPAP and BiPAP machines both treat sleep apnea by providing pressurised air to keep your airway open while you sleep. However, they do this in slightly different ways.
A CPAP (Continuous Positive Airway Pressure) machine delivers a single, constant air pressure throughout the night. This steady stream of air acts like a pneumatic splint, preventing your throat from collapsing and helping you breathe freely. CPAP therapy is highly effective for treating obstructive sleep apnea (OSA) and is often the first choice for most patients. Popular CPAP models include the ResMed AirSense 11 AutoSet and the Philips DreamStation Auto, both known for their reliability and comfort features.
In contrast, a BiPAP (Bilevel Positive Airway Pressure) machine provides two levels of pressure: a higher one when you inhale (IPAP) and a lower one when you exhale (EPAP). This dual pressure makes breathing feel more natural and comfortable, especially for people who require higher pressures or those who struggle to exhale against constant pressure. The ResMed Lumis 100 VPAP S is a leading BiPAP option, offering advanced features like auto-adjusting pressure support and comfort settings to suit individual needs.
Real-world tip: If you find exhaling against CPAP pressure challenging, ask your doctor whether BiPAP could be a better fit. The team at Sove CPAP Clinic can arrange a machine trial to help you compare and decide which is most comfortable for you.
ResMed Lumis 150 VPAP ST-A 4G with Built-in Wireless Connectivity, ...
ResMed Lumis 150 VPAP ST with Built-in Wireless Connectivity, Humid...
Philips Respironics DreamStation Auto CPAP Machine with Humidifier
Find Out What Your Sleep Study Says About Your Condition
Choosing between CPAP and BiPAP therapy starts with understanding your sleep study results. Your sleep specialist or GP will analyse data from a sleep study (polysomnography or home-based sleep test) to determine the severity of your apnea and the best treatment plan.
If your sleep study shows obstructive sleep apnea (OSA) — where your airway physically collapses during sleep — CPAP is usually the recommended therapy. CPAP is highly effective at preventing airway collapse and restoring normal breathing patterns.
However, if your sleep study reveals central sleep apnea (CSA) — where your brain doesn’t consistently send the right signals to your breathing muscles — or a combination of obstructive and central events (known as mixed sleep apnea), BiPAP might be recommended. BiPAP can deliver a backup breathing rate and adjust to your unique needs, making it more effective in these cases.
Real-world tip: Always review your sleep study report carefully with a professional. Sove CPAP Clinic can help interpret the data and explain whether CPAP or BiPAP would be better for you. Our team can also liaise with your sleep physician to adjust settings or recommend the right device.
Compare Comfort and Usage Needs Before Choosing
Comfort is a big part of successful sleep therapy. CPAP machines are generally simpler, with fewer adjustable settings, making them easier to use for many people. They deliver a constant pressure that’s set to the minimum needed to keep your airway open all night.
BiPAP machines, with their separate inhale and exhale pressures, can feel more comfortable for people who need higher pressures. The lower exhalation pressure can make breathing out feel more natural, reducing the feeling of “air hunger” that some users experience with CPAP.
Other factors to consider include:
Mask Fit: Both CPAP and BiPAP machines use similar mask styles—nasal, nasal pillows, and full-face masks. The right fit can improve comfort and reduce air leaks.
Humidification: Most modern machines, like the AirSense 10 and AirCurve 10 VAuto, have built-in heated humidifiers to prevent dryness.
Noise Levels: Both machine types are designed to be quiet, but some BiPAPs may have slightly more motor noise due to the more complex pressure delivery.
Data Tracking: Both devices can track usage and therapy effectiveness. Apps like myAir (ResMed) and DreamMapper (Philips) can help you monitor progress.
Real-world tip: If you’re unsure which feels better, ask to try both at Sove CPAP Clinic. A brief in-clinic trial or home loan can help you experience the difference firsthand before making a final decision.
Talk to Us
Navigating the world of sleep therapy can feel overwhelming, especially if you’re new to it. That’s why Sove CPAP Clinic is here to help. Our expert team can explain the differences between CPAP and BiPAP in detail, answer your questions, and help you choose the right machine for your needs.
We offer:
- Personalised consultations: To assess your breathing needs and preferences.
- Machine trials: To let you experience both types of therapy before you buy.
- Mask fittings: To ensure the best comfort and seal.
- Ongoing support: To help with settings, cleaning, accessories, and any concerns that arise.
Real-world tip: Don’t let confusion or discomfort keep you from getting the sleep you deserve. Book an appointment with Sove CPAP Clinic, and let’s make sleep therapy easy and effective for you.
ALWAYS FOLLOW THE DIRECTIONS FOR USE. CPAP is used for Obstructive Sleep Apnoea treatment. When considering whether a sleep study or CPAP is right for you, speak to your doctor. Medicare criteria and T&Cs apply.
Frequently Asked Questions
Why Would a Patient Need a BiPAP?
A patient might need a BiPAP if they require higher pressures than a CPAP can comfortably deliver, or if their breathing is more complex than simple obstructive sleep apnea. BiPAP is often prescribed for central sleep apnea, complex sleep apnea, or patients with underlying health conditions like COPD or neuromuscular disorders. The machine’s dual pressure system makes exhaling easier and can be more comfortable at higher pressures. If your sleep study shows that your apnea events persist despite CPAP therapy or if you’re intolerant to CPAP, your sleep physician might recommend BiPAP as a better option. Sove CPAP Clinic can help assess your needs and arrange a trial if BiPAP is recommended.
Does BiPAP Need an Oxygen Cylinder?
No, BiPAP machines themselves do not require an oxygen cylinder to function. They work by delivering pressurised room air through a mask. However, in some cases, your doctor may prescribe supplemental oxygen to be added to your BiPAP therapy, especially if you have low blood oxygen levels or certain lung conditions. In that case, an oxygen cylinder or concentrator would be connected to the BiPAP machine using a special port. Sove CPAP Clinic can help coordinate with your medical team to set up oxygen therapy if required.
Which Is Better for Work of Breathing: CPAP or BiPAP?
For people who find it difficult to exhale against a constant pressure—particularly those with higher pressure needs—BiPAP often feels more comfortable and easier to use. Its lower exhalation pressure reduces the effort needed to breathe out, which can be especially beneficial for patients with COPD or restrictive lung diseases. CPAP, on the other hand, maintains one steady pressure and is usually sufficient for most obstructive sleep apnea cases.
What Conditions Is CPAP Used For?
CPAP is most commonly used to treat obstructive sleep apnea (OSA), where the airway collapses during sleep. It’s also sometimes used for mild hypoventilation. CPAP therapy delivers a constant pressure to keep the airway open and is considered the gold standard for OSA treatment. CPAP is generally well-tolerated and easy to use, making it a great first choice for many patients. Sove CPAP Clinic can help you get started with CPAP therapy and support you throughout your journey.
Is BiPAP Considered Life Support?
No, BiPAP is a non-invasive therapy designed for sleep apnea and certain breathing difficulties. While it provides important respiratory support, especially for patients with complex sleep apnea or respiratory muscle weakness, it’s not considered a form of life support like a ventilator. BiPAP is used in home and hospital settings to help patients breathe more comfortably and effectively. If you have concerns about your therapy, Sove CPAP Clinic can explain how BiPAP works and when it’s appropriate to use.
When Should I Switch from CPAP to BiPAP?
Switching from CPAP to BiPAP might be recommended if you’re experiencing persistent symptoms despite good CPAP use, or if your pressure needs are too high to comfortably exhale against. Your doctor might also recommend BiPAP if your sleep study shows significant central apnea events or if you have certain co-existing health conditions like COPD.