Bi-Level Machines

Bilevel machines (BiPAP) are devices that deliver two pressure settings. One pressure is set to inhalation (IPAP), and one is for exhalation (EPAP). An example of a bilevel setting is 14 cm/10 cm H2O. Bilevels are most often prescribed for people who are intolerant of high CPAP pressures or have limited lung function that restricts exhalation and can cause CO2 retention. Bilevel devices are available in fixed pressure, auto adjusting, and advanced models.