CPAP FAQ: all your questions answered | VivaRespire

CPAP FAQ: All Your Questions Answered

Whether you are just starting CPAP therapy or have been using your device for a while, questions will arise. This page compiles the most frequently asked questions from CPAP users, with clear and practical answers.

What CPAP pressure is right for me?

Your CPAP pressure is set by your sleep physician following a titration study. It is expressed in centimeters of water (cmH₂O) and typically ranges from 4 to 20 cmH₂O depending on the patient. If you use an auto CPAP (APAP), the machine automatically adjusts pressure within a prescribed range - this is now the recommended setting for most new patients. To check whether your pressure is correct, look at your residual AHI in the device data: an AHI below 5 indicates effective treatment. Never adjust the pressure yourself without medical advice.

Do I need to use distilled water in the humidifier?

Yes, distilled water is strongly recommended for your CPAP humidifier. Tap water contains limescale and minerals that accumulate in the chamber, promote bacterial growth, and damage the equipment over time. Distilled water is available at pharmacies and supermarkets. Empty and rinse the chamber every morning, and refill with fresh water each evening.

How do I clean my CPAP mask and device?

  • Every morning: wipe the mask cushion with a damp soft cloth. Empty and rinse the humidifier chamber.
  • Once a week: wash the full mask (cushion, frame, headgear) in warm water with mild unscented soap. Rinse thoroughly, air dry away from direct sunlight. Soak the tube in warm soapy water, rinse and let dry.
  • Avoid: alcohol-based products, antibacterial wipes, dishwasher, hot air dryer. These degrade the silicone.

How long does a CPAP mask last?

  • Silicone cushion: 3 to 6 months - the fastest-wearing part
  • Mask frame: 6 to 12 months
  • Headgear (straps): 6 to 12 months
  • Tubing: 12 months, or sooner if cracking appears

Can I travel by plane with my CPAP?

Yes. CPAP is recognized as medical equipment by the vast majority of airlines. It is generally allowed in the cabin in addition to your standard carry-on, provided you notify the airline at booking and carry your medical prescription. Empty the distilled water reservoir before security. Most modern CPAPs work on 100-240V - check your adapter for your destination. For frequent travel, consider the ResMed AirMini, the most compact travel CPAP available.

I have a beard - which mask should I choose?

Beards are one of the most common causes of CPAP mask leaks. Solutions:

  • Nasal pillows mask: the cushions insert directly into the nostrils and do not contact the beard. Best option for beard wearers. The ResMed AirFit P10 is particularly suitable.
  • Fabric-seal nasal masks: some models with fabric (gel-fabric) seals tolerate beards better than standard silicone seals.
  • Avoid beard oil: it degrades silicone.

How do I get used to sleeping with the mask?

  • Wear the mask while awake for 20-30 minutes before lights out, with the machine running
  • Activate the ramp function: pressure starts low and rises gradually as you fall asleep
  • Adjust straps while lying in your sleep position
  • Do not over-tighten: one finger should fit under the strap
  • Persist beyond 3 weeks: most patients who get through this period become long-term users

My CPAP is noisy - is that normal?

Modern CPAP devices run at 25-30 dB - quieter than a refrigerator. If yours is louder, check for mask leaks (almost always the source of hissing sounds), a clogged air filter, tube vibrating against bedding, or an aging device (5-7+ years old).

Does the INAMI convention reimburse my CPAP?

The INAMI/RIZIV convention does not reimburse a CPAP purchase. It organizes a provision of equipment by an approved sleep center - the patient uses the device but never owns it. Patient cost is approximately €0.25/day (€7.50/month). VivaRespire offers an alternative: you purchase and own your CPAP directly. For full details: CPAP reimbursement in Belgium.

My residual AHI is still high - what should I do?

A residual AHI above 5 deserves attention. Most common causes: mask leaks, insufficient pressure, sleeping on the back (worsens AHI), or central apneas developing under CPAP. If your residual AHI stays above 10 despite good usage, consult your sleep physician.

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