Nasal continuous positive airway pressure (CPAP) 'splints' the airway and prevents inspiratory collapse of the upper airway in patients with obstructive sleep apnea. Nine nasal CPAP machines were compared for the ability to maintain airway pressure at various simulated inspiratory flows. Each machine was connected to a vacuum system at 20, 40, and 60 L/min flow after it was initially set at test pressures of 5, 10, or 15 cm H2O and the system or 'mask' pressures were measured. In all machines, mask pressure fell during simulated inspiration and the declines in mask pressure were as high as 5 cm H2O. Because machines varied in their ability to maintain a test pressure, it is recommended that the nasal CPAP mechine used in the home be the same as that which was tested in the sleep laboratory. If a different machine is used, it may require adjustment to assure efficacy.
|Original language||English (US)|
|Number of pages||4|
|State||Published - Jan 1 1991|
- nasal continuous positive airway pressure
- sleep apnea treatment
- sleep disordered breathing
ASJC Scopus subject areas