“I’ve Tried CPAP and It Doesn’t Work For Me”
As sleep physicians, this is one of the most common statements we hear.
Many patients arrive convinced they have “failed” CPAP. They may have purchased a machine online, tried therapy for a few weeks and then given up. Others may have used CPAP for years but still feel tired and frustrated.
The reality is that most patients do not fail CPAP.
More commonly, CPAP has failed to be properly tailored to the patient.
CPAP Remains the Gold Standard
CPAP is the most effective treatment available for moderate to severe obstructive sleep apnoea.
When used correctly it:
• Prevents airway collapse
• Improves oxygen levels
• Reduces snoring
• Improves sleep quality
• Reduces daytime sleepiness
The challenge is that achieving success often requires more than simply supplying a machine.
The Most Common Reasons CPAP Fails
Poor Mask Selection
Many patients are fitted with the wrong mask.
A side sleeper may struggle with a bulky full-face mask.
A mouth breather may fail with nasal pillows.
Choosing the correct interface is one of the most important decisions in successful therapy.
Incorrect Pressure Settings
Pressure requirements vary considerably between patients.
Too little pressure allows ongoing obstruction.
Too much pressure can cause discomfort, leaks and treatment-emergent central apnoeas in susceptible patients.
Unrecognised Mouth Leak
Patients may believe CPAP is working while significant mouth leak is reducing effectiveness.
Common symptoms include:
• Dry mouth
• Air escaping through the mouth
• High leak readings
• Persistent fatigue
Nasal Obstruction
Blocked noses are one of the most under-recognised causes of CPAP intolerance.
Conditions such as:
• Allergic rhinitis
• Deviated nasal septum
• Chronic sinus disease
can dramatically affect comfort.
Treatment-Emergent Central Sleep Apnoea
Occasionally CPAP reveals or induces central events.
Patients may describe:
• Difficulty adapting
• Persistent sleep disruption
• Ongoing fatigue despite good compliance
This is where specialist review becomes particularly important.
Why Online CPAP Purchases Often Fail
Online suppliers can provide equipment.
They cannot always provide:
• Detailed sleep study interpretation
• Pressure optimisation
• Mask troubleshooting
• Identification of central sleep apnoea
• Investigation of persistent symptoms
Success often depends on ongoing support rather than the machine itself.
When Patients Are Still Tired Despite CPAP
Sometimes CPAP is working perfectly.
The problem lies elsewhere.
Other possibilities include:
• Insufficient sleep
• Circadian rhythm disorders
• Restless legs syndrome
• Medication effects
• Depression or anxiety
• Narcolepsy
• Residual respiratory events
A specialist assessment can help identify these issues.
How We Approach CPAP Failure
At Breathe Well we assess:
- Sleep study findings
- Device data downloads
- Leak patterns
- Residual AHI
- Mask fit
- Comfort issues
- Alternative sleep disorders
The goal is to identify the specific barrier preventing success.
The Bottom Line
Most patients who believe they have failed CPAP can achieve successful therapy with the right support and troubleshooting.
The machine is only one part of treatment. Expertise, education and follow-up are often the factors that determine long-term success.
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