What Is an APAP Machine?

APAP Machine vs. CPAP Machine

APAP and CPAP machines have a similar setup, featuring a small motorized unit that filters and pressurizes air, which is then delivered via tubing and a mask. Many machines also contain a humidifier, to add moisture to the air that’s delivered. However, the difference between them is that CPAP machines are programmed to deliver a set level of pressure throughout the night, and an APAP can adjust pressure as required. 

APAP machines typically cost more than CPAP devices because they feature more complex technology. Outside of insurance, a CPAP will typically cost between $500 and $1,000, while an APAP may cost $600 to $1,600.

More: APAP vs. CPAP

Who Should Use an APAP Machine?

People who struggle with the fixed pressure of a CPAP may prefer an APAP. 

Also, research shows that APAP may be more effective than CPAP in cases of patients with positional OSA⁵, which is when apnea severity changes depending on the sleeping position. This same study found that some patients experienced an increase in dry mouth on CPAP due to the fixed air pressure drying up saliva and that switching to APAP resolved this.⁵ 

Changes in body weight can affect the severity of sleep apnea, so people whose weight frequently fluctuates may also benefit from APAP⁶.

Who Should Use a CPAP Machine?

CPAP machines are the most common form of treatment for OSA⁷ as they’re cheaper and more widely available, so CPAP could be the first type of machine offered to you. If treatment is effective and tolerated, you will likely remain on CPAP as most insurers won’t pay for a more expensive machine if it’s not necessary. 

Some light sleepers⁸ may prefer the consistent pressure of CPAP if they’re likely to feel disturbed by the fluctuating pressure of APAP. 

APAP Machine Benefits

An APAP delivers the lowest possible effective pressure, which some people find less disturbing than the constant pressure of a CPAP.⁶ A 2019 systematic review showed that many people experience less pressure discomfort and less nasal irritation⁹ with APAP, and some patients also reported that APAP machines were quieter.

Potential APAP Machine Drawbacks 

While some people prefer the adjusting pressure of an APAP, some patients might experience discomfort or disturbed sleep due to the fluctuating pressure. Some users may also find apnea events returning once the pressure has decreased.⁹

APAP machines are sensitive to air leaks, as mentioned in a 2022 study¹⁰ that saw increased leakage over time. In the case of significant air leaks, APAP machines may not be able to detect apnea events accurately, which may result in them delivering incorrect levels of air pressure. Researchers hypothesize that incorrect pressure increases can lead to some patients developing central sleep apnea.⁹ 

Additionally, a 2016 randomized clinical trial¹¹ on 322 patients with OSA found that CPAP machines were more effective at lowering blood pressure over a 24-hour period than APAP machines.

What to Do if You Think You Need an APAP Machine 

Symptoms of sleep apnea¹² include gasping for air during sleep, loud snoring, waking up with a headache and/or dry mouth, low mood and irritability, extreme daytime sleepiness, and difficulty focusing. However, signs of sleep apnea may overlap with other medical conditions, so it’s important to get checked out by your doctor to confirm a diagnosis. If they suspect you have sleep apnea, they’ll likely recommend you take a sleep study, either at home or in a clinic. 

If you receive a sleep apnea diagnosis, you’ll receive a prescription for the appropriate treatment, which may consist of a CPAP, APAP, or other PAP device.

How to Buy an APAP Machine 

You must have a prescription from a healthcare professional to buy an APAP machine. Once you have your prescription, you can purchase an APAP machine yourself or through insurance if they cover an APAP. When going through insurance, most insurers will have an approved list of suppliers. You cannot buy an APAP if your prescription is for a CPAP. 

Frequently Asked Questions

What is an APAP machine?

An APAP is a form of sleep apnea treatment that delivers pressurized air to the patient while they sleep to help keep their airway open. The APAP is programmed with a set pressure range determined by your prescription, and the pressure can change throughout the night based on your breathing patterns, which are monitored by a sensor.

Is an APAP machine better than a CPAP machine?

APAP machines are more complex and often more expensive than CPAP machines because they provide auto-adjusting air pressure rather than the fixed air pressure of a CPAP. However, neither machine is better than the other; it all depends on the individual needs of the patient.

Most people with obstructive sleep apnea will start on CPAP, and those who are sensitive to pressure changes may prefer the fixed pressure of a CPAP. However, people who aren’t successful with a CPAP may prefer APAP, and patients with positional OSA may find an APAP more effective.⁵

If you’re struggling to sleep with your PAP device, always speak to your healthcare provider. They may be able to suggest machine adjustments, a different type of machine, or an alternative to PAP therapy.

Where can I buy an APAP machine?

As long as you have a valid prescription, you can buy an APAP machine online or at a brick-and-mortar store. Some people prefer to shop in person to try on different mask styles and find one that’s more suited to them. However, some online retailers offer AI mask-fitting technology, which can be useful for people who cannot easily access a store.

You can also opt to go through your health insurance if they will help cover your APAP device.