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Auto CPAP or APAP Machines. Similar to the CPAP machine, auto adjusting or APAP machines automatically calculate a patientâs required pressure and adjust to a comfortable level without any pre-set programming. These machines are ideal for patients who have various pressures during the night.
In summary, the primary difference between CPAP and BiPAP, or bilevel, machines is the pressure differential. While CPAP has one pressure. BiPAP has two pressures. The ordering sleep physician usually decides what type of breathing treatment should be used.