Notice: Users may be experiencing issues with displaying some pages on stanfordhealthcare.org. We are working closely with our technical teams to resolve the issue as quickly as possible. Thank you for your patience.
An auto titration PAP machine, also called a "smart" machine, adjusts the air pressure in response to changes in your breathing pattern, allowing the pressure to vary across the night. The auto titrating machines have an algorithm that increases the air pressure when your breathing is compromised and lowers the air pressure after a period of normal respiration.
Auto-titrating machines are ideal for people who need a significantly higher pressure during just a portion of the night, for instance when sleeping on their back or in REM sleep because you don't need to fix the pressure to the highest level needed. Instead, the changing pressure allows you to have the lowest pressure possible throughout the night. Auto-titrating machines also work well to compensate for minor weight changes or use of alcohol or other sedatives. However, the algorithms are not perfect, and factors such as a mask leak can interfere with the machine's feedback loop, which may result in the wrong pressure being delivered.