The interval throughout which a CPAP machine regularly will increase air stress from a low start line to the prescribed therapeutic stress is called its preliminary stress enhance characteristic. This characteristic permits customers to go to sleep extra simply with decrease stress, then comfortably obtain the complete therapeutic stress as they sleep. For instance, a machine would possibly start at 4 cm H2O and slowly enhance over 45 minutes to a ultimate stress of 12 cm H2O.
This gradual stress enhance improves consolation and reduces frequent points like issue exhaling in opposition to excessive stress when first falling asleep, claustrophobia, and aerophagia (air swallowing). This characteristic has grow to be a regular inclusion on trendy CPAP units, contributing considerably to raised affected person compliance and profitable remedy. Early CPAP machines lacked this consolation characteristic, making remedy initiation more difficult for some customers.