(HealthDay News) -- CPAP (continuous positive airway pressure) is a device used to improve breathing in people with chronic conditions such as sleep apnea.

The system may have to be adjusted after initial use to help ensure the best treatment. The U.S. National Heart, Lung, and Blood Institute offers these signs that a specialist may need to adjust your CPAP:

  • You have gained or lost a significant amount of weight since starting the device.
  • You continue to feel sleepy during the day.
  • You are using another sleep apnea treatment, such as a mouthpiece.
  • It's been a month since you first started using your CPAP, or six to 12 months since your last adjustment.