Does Oxygen Therapy Help With Sleep Apnea? Here’s What You Should Know

If you have sleep apnea, you may wake up feeling tired even after spending a full night in bed. One reason is that sleep apnea can repeatedly interrupt normal breathing and cause blood oxygen levels to fall during sleep.

This often leads people to ask: Does oxygen therapy help with sleep apnea? And can an oxygen concentrator with CPAP provide better nighttime respiratory support?

The short answer is: oxygen therapy may help some people with sleep-related low oxygen levels, but oxygen alone does not usually treat the underlying airway blockage caused by obstructive sleep apnea (OSA). For many people with OSA, CPAP remains a primary treatment because it helps keep the airway open during sleep.

Understanding the difference between oxygen therapy and positive airway pressure can help you have a more informed conversation with your healthcare provider.

What Happens to Oxygen Levels During Sleep Apnea?

Sleep apnea is a sleep-related breathing disorder in which breathing repeatedly stops or becomes restricted during sleep.

With obstructive sleep apnea, the upper airway can become blocked or narrowed while you sleep. When this happens, airflow decreases or stops temporarily. Oxygen levels in the blood can also fall before breathing resumes.

These events can happen repeatedly throughout the night. NHLBI notes that sleep apnea is associated with serious health risks, including cardiovascular conditions, high blood pressure, stroke, and other complications.

A sleep study can help determine whether you have sleep apnea, what type you have, and how severe it is. Sleep testing can also monitor oxygen levels during sleep.

Does Oxygen Therapy Help With Sleep Apnea?

It can help improve blood oxygen levels in certain situations, but oxygen therapy is not the same as treating sleep apnea itself.

Supplemental oxygen provides additional oxygen to breathe. It may be prescribed when a person has clinically significant oxygen desaturation during sleep or has another respiratory or medical condition that contributes to low oxygen levels.

However, if the primary problem is an obstructed airway, simply adding oxygen does not physically open that airway.

This is an important distinction.

Research reviewed by the American Academy of Sleep Medicine found that supplemental oxygen can improve oxygen saturation in people with obstructive sleep apnea, but oxygen therapy should not be considered equivalent to therapies that address the airway obstruction.

In other words:

• Oxygen therapy: Helps increase the amount of oxygen available for breathing.
• CPAP: Uses positive airway pressure to help keep the airway open.
• Oxygen + CPAP: May be appropriate for some patients when supplemental oxygen is medically indicated in addition to PAP therapy.

The right approach depends on the individual's diagnosis, oxygen levels, sleep study results, and other health conditions.

Why Is CPAP Commonly Used for Sleep Apnea?

A sleep apnea machine, such as a CPAP machine, works differently from an oxygen concentrator.

CPAP stands for continuous positive airway pressure. The machine delivers pressurized air through a mask while you sleep. The pressure helps keep the airway open so breathing can continue.

NHLBI identifies positive airway pressure as a common treatment for sleep apnea. CPAP provides continuous pressure, while other PAP devices can provide different pressure levels depending on the patient's needs.

This is why someone diagnosed with obstructive sleep apnea should not automatically replace CPAP with an oxygen concentrator.

If your doctor has prescribed CPAP, continue using it as directed unless your healthcare provider recommends a different treatment.

What Is an Oxygen Concentrator With CPAP?

An oxygen concentrator with CPAP generally refers to a setup where supplemental oxygen from an oxygen concentrator is used alongside a CPAP or other PAP device.

The oxygen concentrator takes oxygen from room air and provides concentrated oxygen for supplemental oxygen therapy. The CPAP machine, meanwhile, provides positive airway pressure.

The two devices therefore have different jobs.

CPAP helps with:

• Keeping the upper airway open
• Reducing breathing interruptions caused by airway obstruction
• Supporting more consistent airflow during sleep

An oxygen concentrator helps with:

• Providing supplemental oxygen when medically prescribed
• Supporting blood oxygen levels when supplemental oxygen is needed
• Providing a continuous source of concentrated oxygen during therapy

For some patients, a healthcare provider may recommend using both. AASM guidance on PAP titration describes circumstances where supplemental oxygen may be added during PAP treatment when oxygen saturation remains low despite appropriate PAP therapy.

Do not add supplemental oxygen to your CPAP setup without medical guidance. Your healthcare provider should determine whether oxygen is appropriate and what flow rate is needed.

Can You Use an Oxygen Concentrator and CPAP Together?

In some cases, yes. But the combination should be based on medical advice.

VARON Serene 5, for example, is a 5L home oxygen concentrator designed to provide oxygen at a concentration of 93% ± 3%, with adjustable flow from 0.5 to 5 L/min. The manufacturer states that the device is compatible with VARON CPAP/BiPAP machines sold separately.

This makes the Serene 5 an option to discuss with a healthcare professional if supplemental oxygen has been prescribed as part of a nighttime respiratory support plan.

VARON Serene 5 for Home Oxygen Support

The VARON 5L Premium Home Oxygen Concentrator Serene 5 is designed for continuous home oxygen delivery.

Key features include:

• 93% ± 3% oxygen concentration
• 0.5–5 L/min adjustable flow
• Quiet operation at under 43 dB
• LCD control panel
• Large humidification bottle
• Nebulizer function
• Four universal wheels
• Safety indicators
• Automatic shutdown timer
• 24/7 continuous operation capability
• Compatibility with VARON CPAP/BiPAP machines

The built-in humidification bottle may also make oxygen therapy more comfortable for people who experience dryness during use.

However, these features do not mean the Serene 5 is a standalone treatment for obstructive sleep apnea. Its role is supplemental oxygen delivery, while CPAP is designed to provide positive airway pressure.

When Might Oxygen Be Recommended for Sleep?

Whether oxygen therapy is appropriate depends on why your oxygen level is falling.

A healthcare provider may consider supplemental oxygen when testing shows clinically significant oxygen desaturation that requires additional support. During PAP titration, AASM guidance has recommended considering supplemental oxygen in specific circumstances when oxygen saturation remains at or below 88% under defined conditions.

There are also different forms of sleep apnea.

Obstructive sleep apnea

This occurs when the upper airway becomes blocked or collapses during sleep. PAP therapy is commonly used because it directly addresses the airway obstruction.

Central sleep apnea

Central sleep apnea involves a different mechanism involving the brain's control of breathing. Treatment can be different from OSA, and oxygen may be considered for certain patients depending on the underlying cause and clinical situation. AASM guidance includes oxygen among potential therapies for some forms of central sleep apnea.

That is another reason not to self-treat sleep apnea with supplemental oxygen.

Is an Oxygen Concentrator Better Than a Sleep Apnea Machine?

They are not interchangeable devices.

If you have obstructive sleep apnea, a CPAP or other appropriate PAP device may be prescribed to address the airway obstruction.

An oxygen concentrator is different. It provides supplemental oxygen but does not provide the same airway-opening pressure as CPAP.

A simple way to remember the difference is:

If your doctor recommends both therapies, an oxygen concentrator such as the VARON Serene 5 may be used as part of the prescribed setup.

Signs You Should Talk to a Healthcare Provider

If you regularly experience symptoms such as loud snoring, witnessed pauses in breathing, gasping during sleep, morning headaches, or excessive daytime sleepiness, talk with a healthcare professional.

A sleep study may be recommended to determine whether sleep apnea is present and how severe it is.

You should also discuss your treatment if:

• Your CPAP treatment does not seem effective
• You continue to have low oxygen readings at night
• You frequently wake up gasping or short of breath
• You are considering adding supplemental oxygen
• You have another condition affecting your breathing or oxygen levels
• You want to combine an oxygen concentrator with CPAP or BiPAP

Do not change CPAP pressure settings or oxygen flow rates on your own.

Final Thoughts: Does Oxygen Therapy Help With Sleep Apnea?

So, does oxygen therapy help with sleep apnea?

It can help improve oxygen levels for certain patients, but oxygen therapy does not generally correct the airway obstruction that causes obstructive sleep apnea. CPAP works differently by providing positive airway pressure to help keep the airway open.

For people who have both sleep apnea and medically confirmed nighttime oxygen needs, a healthcare provider may recommend CPAP together with supplemental oxygen.

If supplemental oxygen has been prescribed for you, the VARON Serene 5 5L Premium Home Oxygen Concentrator provides adjustable 0.5–5 L/min oxygen flow, 93% ± 3% oxygen concentration, quiet operation, and compatibility with VARON CPAP/BiPAP machines.

Before combining an oxygen concentrator with CPAP, ask your healthcare provider whether supplemental oxygen is appropriate for your condition and what settings should be used.

Learn More About VARON Home Oxygen Concentrators

Explore VARON's home oxygen concentrator options to find a model that fits your prescribed oxygen therapy needs. For questions about setup, compatibility, or operating instructions, consult your healthcare provider and the product manual.