Ramp

This is a common feature on most CPAP machines. The ramp function increases the pressure gradually until the machine reaches the prescribed pressure. Some users find this gradual increase to the prescribed pressure more comfortable. The ramp time is usually measured in 5-minute intervals and typically ranges between 5 and 45 minutes to reach the prescribed pressure setting.

Example: Ramp Starting point: 4cm H2O. Ramp Time: 20 Minutes. Prescribed pressure: 10cm H2O. This means the CPAP machine would start at 4cm H2O and over the next 20 minutes gradually increase the pressure to 10cm H2O.